Core Natural Resources 8-K Regulation FD Disclosure

Exhibit 99.1

2011 Investor Presentation January

Certain statements and information in this presentation may constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and Section 27A of the Securities Act. The words "believe," "anticipate," "plan," "intend," "foresee," "guidance," "potential," "expect," "should," "will" or similar expressions are intended to identify forward-looking statements (including those contained in certain visual depictions) in this presentation within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements reflect the Company's current expectations and/or beliefs concerning future events. As a result, these forward-looking statements rely on a number of assumptions, forecasts, and estimates and, as a result, these forward-looking statements are subject to a number of risks and uncertainties that may cause the Company's actual performance to differ materially from that projected in such statements. Among the factors that could cause actual results to differ materially include, but are not limited to, industry cyclicality and seasonality and adverse weather conditions; ability to service the Company's debt; fluctuations in customer demand and other patterns; raw material pricing and supply; competitive activity and pricing pressure; general economic conditions affecting the construction industry; financial crises or fluctuations in the U.S. and abroad; changes in laws or regulations; and the volatility of the Company's stock price. See also Item 1A "Risk Factors" in the Company's Annual Report on Form 10-K for the fiscal year ended October 31, 2010, which identifies other important factors, though not necessarily all such factors, that could cause future outcomes to differ materially from those set forth in the forward-looking statements. The Company expressly disclaims any obligation to release publicly any updates or revisions to these forward-looking statements to reflect any changes in its expectations. This presentation may also contain non-GAAP financial information. The Company's management uses this information in its internal analysis of results and believes that this information may be informative to investors in gauging the quality of the Company's financial performance, identifying trends in our results and providing meaningful period-to-period comparisons. For a reconciliation of any non-GAAP measures presented in this document, you may find a reconciliation of that measure to the most directly comparable financial measure calculated according to GAAP in the Appendix section of this presentation as well as on the Company's web site by following the Investor Relations link to access statements filed by the Company with the Securities and Exchange Commission. 2 Safe Harbor

Mission Statement It is our mission to produce sustainable products and systems, for the metal construction industry, of enduring quality that enhance the beauty, form and function of structures in which people work, live, play, learn, worship and use for storage and protection. 3

It is the vision of NCI to be the undisputed leader in the U.S. building construction industry by providing superior products and services through our metal coil coating, metal components and custom metal building systems divisions. 4 Vision Statement

The Market

6 Nonresidential Market Segments

Significant operating expertise Management averages 16 years of experience in the Metal Building Manufacturing industry Proven ability to operate and grow the business and in the current downturn to execute cost reduction initiatives Leading market positions in all operating segments High quality, well respected stable of brands marketed through a broad network of builders and distributors Large variety of products and services Participates in highly fragmented markets and has attractive spread of risk in terms of geography, end market applications and customer concentration 32 manufacturing plants located throughout North America operated in an efficient "hub-and-spoke" network Places manufacturing and distribution operations closer to our customers Affiliated builder network and architectural relationships provide substantial and extended channels to market Each segment uses same type of steel Ability to receive contract pricing without long-term contracts Significant ability to flex manufacturing infrastructure and ESG&A levels to changes in volume Vertically integrated producer enabling faster turnaround times - majority of orders are completed in 1 - 3 months Positioned to capitalize on material conversion trends and green initiative Actively pursuing market leading initiatives Leading Market Positions and Strong Brands Motivated and Experienced Management Team Integrated Business Model Well Positioned for Growth Efficient Distribution Model High Volume Producer with Flexible Cost Structure 7 NCI's Strategic Positioning

Segment Metal Coil Coating Metal Components Engineered Building Systems Focus Cleaning, treating & painting flat rolled metal coil substrates Metal roof & wall systems, metal partitions, metal doors, etc. Engineered building systems for low rise nonresidential markets Key Products Product Utilization Used by manufacturers of metalcomponents and engineered building systems (NCI's other segments used approximately 54% of production). Also sold to other manufacturers of painted metal goods, such as the appliance industry. Roof and wall systems with specialized product lines such as insulated metal panels and standing seam roof panels for architectural and commercial/industrial applications, as well as traditional single-skin, thru-fastener panels primarily used for agricultural and residential facilities; secondary structural (purlins and girts), as well as ancillary accessories such as doors and trim. Custom designed, engineered, ready for assembly primary structural framing,secondary structural members (purlins, girts) and metal roofs/walls. NCI Companies FY2010 % of Total Revenue 7% 38% 55% FY2010 % of Total EBITDA1 37% 62% 1% Segment EBITDA excludes Corporate Costs of $42.4 MM 1 8 Three Integrated Segments

State as of close of 2010 unless otherwise noted 172 330 5 54% 30% 16% 9 Cleans, treats, coats and paints flat-rolled metal coil substrates Slits and/or embosses coated coils Manufacturers of painted steel products: Metal Buildings Light Fixtures HVAC Water Heater Jackets Walk-in Coolers PRODUCTS CUSTOMERS Light Gauge Coil Coating Light Gauge Coil Coating Light Gauge Coil Coating Est. Rank % Market Share Precoat Metals Division 1 18% Roll Coater, Inc. 2 15% NCI 3 12% Steelscape 4 9% SDI 5 8% Others N/A 38% Total 100% Heavy Gauge Hot Rolled Steel Coating Heavy Gauge Hot Rolled Steel Coating Heavy Gauge Hot Rolled Steel Coating Est. Rank % Market Share NCI 1 41% Hanna Steel 2 26% Midwest Metal Coaters 3 16% SDI 4 10% Others N/A 7% Total 100% Source: 2010 NCI Estimates STATS (Volume in tons) Internal: External: Construction All Other MARKET SHARE PERFORMANCE No. of Customers: No. of Employees: No. of Plants: Metal Coil Coating END USE (FY 2010)

27,423 916 18 28% 49% 20% 3% State as of close of 2010 unless otherwise noted PRODUCTS 10 CUSTOMERS Small, medium and large contractors Specialty roofers Engineered building fabricators Distributors/lumberyards End users Pre-formed metal roof and wall systems Insulated metal panels Secondary structural members Flashings and accessories Roll-up doors and interior partition systems Metal Components Metal Components Metal Components Est. Rank % Market Share NCI 1 12% Fabral 2 8% Metal Sales 3 7% McElroy 4 5% Firestone 5 5% Others N/A 63% Total 100% Source: 2010 NCI Estimates No. of Customers: No. of Employees: No. of Plants: STATS (Volume in tons) Internal: External: Commercial & Industrial Ag & Res Retail END USE (FY 2010) MARKET SHARE PERFORMANCE Metal Components

State as of close of 2010 unless otherwise noted 3,382 2,026 9 (CHART) 11 Custom engineered buildings Self-storage mini-warehouses Long Bay(r) System Engineered Building Systems Engineered Building Systems Engineered Building Systems Est. Rank % Market Share NCI 1 28% BlueScope Buildings 1 28% Nucor Building Systems 3 24% Others N/A 20% Total 100% PRODUCTS CUSTOMERS Builder network General contractors Developers Custom fabrication customers End users No. of Builders: No. of Employees: No. of Plants: STATS (Volume in tons) Commercial & Industrial Institutional Agricultural END USE (FY 2010) MARKET SHARE PERFORMANCE SALES CHANNEL 61% 25% 14% Authorized Builders/Erectors Direct Sales Resellers/Private Label Non-Affiliated Builders Engineered Building Systems Source: 2010 NCI Estimates

12 Architectural Market Activity ARCHITECTURAL BILLINGS INDEX (CHART)

(CHART) Square Feet (in millions) 13 Nonresidential Construction Activity Historical and Forecast Volume for Square Feet Millions of Square Feet Source: McGraw-Hill McGraw-Hill Linear Trend

(CHART) Nonresidential Industrial Vacancy Rates 14 Vacancy Rate Square Feet (in millions) Nonresidential Industrial Vacancy Rates vs. Construction Activity

(CHART) 15 GDP vs. Construction Activity Percentage Change Correlation 0.85 % Change GDP % Change Construction Activity Source: McGraw-Hill

(CHART) 16 Historical Performance & Nonresidential Activity Adjusted EBITDA (Dollars in millions) U.S. Nonresidential Construction (Square Feet in billions) Source: McGraw-Hill (Dotted line represents projection)

(CHART) 17 Historical Performance & Steel Price Activity Adjusted EBITDA (Dollars in millions) CRU Index in October

Steel Price Activity The CRU North American Steel Price Index has been published by the CRU since 1994. It's based on a survey of industry participants and is commonly used in the settlement of physical and financial contracts within the steel industry. The prices surveyed are purchases for forward delivery, according to lead time, which will vary by approximately one to two months. To better align with NCI's fiscal year, the values shown are from October of each year. (1994 Index = 100) NCI Plan 18 CRU North American Steel Price Index (CHART)

(CHART) 19 Material Cost Comparisons Over Time Producer Price Index thru October 2010

Financial Overview

Historical Financial Perspective 21

(CHART) 22 Adjusted Operating Segment Results Fiscal Year 2009 THIRD PARTY SALES $965 million Fiscal Year 2009 ADJUSTED OP PROFIT $59 million (1) (1) Before corporate expenses, in addition see Appendix for the reconciliation of the non-GAAP financial measure to the GAAP financial measure. (2) Engineered Building Systems incurred an adjusted operating loss for fiscal year 2010. (CHART) (CHART) Fiscal Year 2010 THIRD PARTY SALES $871 million Fiscal Year 2010 ADJUSTED OP PROFIT $29 million (1) (CHART) Fiscal Year 2009 vs. Fiscal Year 2010

Strategy

24 Five-Year Growth Strategy Corporate-Wide Initiatives Fixed cost containment as the nonresidential construction market improves is our top corporate-wide initiative Continue to identify and assess opportunistic acquisitions Enhance plant utilization through expanded use of our Hub & Spoke Distribution model Continue to focus on leveraging Technology and Automation to be lowest cost producer Coatings Division Diversify external customer base to substantially increase toll and package sales Continue to leverage efficiency improvements to be lowest cost producer Open our recently purchased Middletown, Ohio coating facility Components Division Expand Insulated Panel product offering utilizing our new state-of-the-art manufacturing facility in Jackson, MS and other future locations Accelerate and expand Nu-Roof, our retrofit roofing product Buildings Division Marketing and Sales initiatives that enhance geographic and end market focus Reduce cycle time and costs through virtual centralization of Engineering and Drafting based on common suite of engineering applications Improving manufacturing efficiencies through the enhancement of our supply chain

25 2009 Operational Restructuring Buildings Group Reduced manufacturing facilities from 16 to 9 Maintained customer touch points (sales/service) Transitioned to a single leadership role for both RCC & NCI buildings groups Manufacturing operations reorganized Engineering and Drafting reorganized Components Group Reduced manufacturing facilities from 22 to 18 Maintained the necessary footprint to service external customers and provide support for the Buildings group's needs

Employee Reduction (CHART) 26 Employee Count

MANUFACTURING PLANTS BEFORE AFTER COATERS COMPONENTS BUILDINGS TOTAL 5 22 16 43 5 18 9 32 27 NCI Manufacturing Plants After Reductions Before After

28 Significant Cost Reductions Completed Cost Reduction Summary (in thousands) Cost Reduction Cost Reduction Cost Reduction Cost Reduction Headcount Reduction Headcount Reduction Headcount Reduction By Segment Fixed Costs 1 Direct Variable Costs 2 Total Cost Savings % Reduction Number % Reduction Buildings $88,205 $374,188 $462,393 48.2% 1,530 41.8% Components 23,016 152,532 175,548 33.9% 547 36.7% Coaters 2,321 29,326 31,647 46.8% 40 10.3% Corporate 7,703 5,319 13,022 20.2% 61 25.3% Total $121,245 $561,365 $682,610 42.4% 2,178 37.7% By Cost Line Item Cost of Goods $71,250 $522,664 $593,914 44.8% 1,619 43.3% Engineering 19,004 3,573 22,577 41.9% 217 33.0% SG&A 30,991 35,128 66,119 28.6% 342 24.7% Total $121,245 $561,365 $682,610 42.4% 2,178 37.7% (1) Fixed cost reductions represent 30% of total 2008 fixed costs. (2) Direct variable costs include such items as Materials, Bonus, Commission, etc. that will vary based on NCI's performance without any other action.

29 Insulated Panels: Product & Process Photos Polyisocyanurate Insulation Exterior Metal Skin Interior Metal Skin Wide range of market and construction applications Improves thermal performance Increases energy efficiency Supports many LEED and green requirements Reduces a building's operational expenses Easy installation accelerates construction schedules

30 Retrofit Roofing BEFORE Structural Build-Up AFTER Provides a sloped roof solution that overcomes issues commonly associated with a flat roof including water runoff Can be applied over existing roof system, eliminating tear-off and accelerating production schedule Has all the benefits provided by a metal roofing system including: Low maintenance and associated costs Improves aesthetics of existing roof Highly durable with a life expectancy of up to 40-years

Financial Data

(CHART) 32 Historical Performance * Adjusted Earnings (Loss) per Diluted Share is a non-GAAP financial measure which is reconciled to the most comparable GAAP financial measure as indicated in the Appendix. The Adjusted Earnings (Loss) per Diluted Share has been retrospectively adjusted for the Reverse Stock Split that occurred on March 5, 2010. * Adjusted EBITDA is defined in the Company's credit facilities and is calculated within the Appendix. Adjusted Earnings (Loss) Per Diluted Share* Adjusted EBITDA* (CHART) (CHART) Sales (in millions) (in millions)

(CHART) 33 *Sales amounts have been retrospectively adjusted as a result of certain reclassifications due to the further integration of RCC and the rationalization of our operations. Seasonal Trends For Fiscal Q1 2004 through Q4 2010 Sales (in millions) Adjusted EBITDA (in millions)

34 NCI Capital Structure Over Time $234 $333 $408 (CHART) (CHART) NCI Sales NCI's Capital Structure (in millions) (in millions) (CHART) Overall Nonresidential Construction Spending (in billions)

Cash Flow 35 (750,796) 33,531 759,597 53,004 95,336 - - - - (21,657) 2,589 (19,068) (235,874) - - - - 250,000 (54,659) (451) (12,967) (53,951) (99) 22,218 a Includes $622.6 million for goodwill and other intangible asset impairment, $97.6 million debt extinguishment charge, $40 million lower of cost or market charge, $11.2 million change of control charges, $9.1 million restructuring charges and $6.3 million asset impairment. 2007 2005 2004 2003 2006 2008 44,890 22,974 10,029 (54,163) 23,730 - - - - (9,327) 3,316 (6,011) (243,750) 200,000 - - - - - - - - 20,049 (23,701) - - - - (5,982) 22,800 23,007 4,284 19,177 69,268 (4,310) (17,912) 3,891 (18,331) (48,550) - - - - - - - - (114) 2,401 (46,263) - - - - 4,674 51,337 24,488 14,540 27,902 118,267 (27,399) (19,524) 1,118 (45,805) (23,700) 180,000 - - - - (40,676) 4,408 120,032 - - - - 192,494 68,946 31,092 13,804 7,672 121,514 (366,598) (27,056) 308 (393,346) (78,511) 200,000 - - - - (37,572) 12,104 96,021 133 (175,678) 58,568 36,242 6,418 36,397 137,625 (20,086) (42,041) 5,764 (56,363) (91,447) 90,500 - - - - (36,122) 5,444 (31,625) 379 50,016 ($ in thousands) 2009 Net Income (Loss) Depreciation & Amortization Other Non-cash items Changes in Working Capital Operating Cash Flow Acquisitions Capital Expenditures Other Investing Cash Flow Debt Repayment Debt Issuance Convertible Preferred Stock Refinancing Costs Stock Repurchases Other Financing Cash Flow Exchange rate changes Net Increase (Decrease) in Cash Operating Cash Flow Investing Cash Flow Financing Cash Flow a a b 73,278 36,333 19,727 (89,144) 40,194 - - - - (24,803) 6,113 (18,690) (26,529) - - - - - - - - (2,226) (1) (28,756) 399 (6,853) b Includes ($13.0) million and ($10.1) million for restricted cash for cash collateralized letters of credit from fiscal 2009 and 2010, respectively. 2010 (26,877) 34,504 5,311 (6,632) 6,306 - - - - (14,030) 767 (13,263) (15,669) - - - - - - - - (125) (381) 10,140 (6,035) (8) (13,000) b

36 Capitalization

- - Building complexities - - Financial - - sustainability Appendices

End Uses for Complexity Classifications 38

Financial Appendix

40 Convertible Preferred Stock Key Terms Regarding Dividend Payments Dividends may be paid in cash (8% annual rate) or in-kind (12% annual rate) at the Company's option: Dividend payment dates: March 15th, June 15th, September 15th and December 15th. Credit facility restrictions: Both our ABL Facility and Term Loan Credit Facility restrict our ability to pay cash dividends until the first quarter of fiscal 2011. Thereafter, cash dividend payments are generally limited to 50% of the consolidated net income accumulated subsequent to August 2, 2009, subject to specified adjustments, less the sum of all previous distributions. Dividend Elimination or "knock-out": The dividend rate becomes 0% permanently, if at any time after April 2012 the trading price of our common stock exceeds $12.75 (adjusted for stock splits, etc.) for 20 consecutive trading days. However, in the event of a default, as defined, certain penalty dividends may be required. * *Subsequent to October 31, 2010, the Company paid $5.55 million of accrued dividends in cash instead of in kind. Therefore, the total number of shares of common stock if converted was reduced to 43,658,276.

41 Simplified Illustration of Diluted EPS Earnings are allocated between those securities that have rights to participate in future dividend distributions based on their relative weighted average ownership interests. Losses are not allocated to participating securities because they are not contractually obligated to fund or otherwise share in those losses. Example B assumes that stock options are dilutive after having applied the treasury stock method. If using the "if converted" method resulted in lower diluted earnings per share than the two class method, the lower amount would generally be reported. However, given the Company's capital structure, this is not likely to occur.

42 Simplified Beneficial Conversion Feature (BCF) Charge Illustration for Paid In-Kind Dividends The daily dividend amount is determined quarterly based on the underlying amount of convertible preferred stock outstanding. The daily dividend amount is accrued at an annual rate of 12% but if it is later paid in cash instead of in-kind, the excess 4% dividend and the related beneficial conversion feature charge would be eliminated in the period in which it is paid. The Company has the option to pay the dividends in cash at 8% or in-kind at 12%, subject to restrictions in the credit facilities for our term loan and ABL revolver. Further, if at any time after April 2012, our stock trades above $12.75 for 20 consecutive trading days, the underlying basic preferred stock dividends are permanently eliminated thereafter. The conversion price of $6.374 reflects the adjustment for the one-for-five reverse stock split that occurred in March 2010. The amount of the beneficial conversion feature charged in any quarter will be the sum of the daily BCF amounts calculated as illustrated above and will depend on the daily closing price of our stock in relation to the $6.374 conversion price. The charge is limited or "capped" at the underlying dividend amount. As an example, based on a daily stock price ranging between $8 and $15, the estimated quarterly charge would be $2 million to $7.9 million. The following table illustrates a few selected dates out of a full quarter's calculation of the BCF charge on our Paid In-Kind Dividends:

43 Adjusted Earnings (Loss) Per Diluted Share 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Earnings (loss) per diluted share, GAAP basis $12.15 $4.55 $(9.05) $6.00 $11.20 $12.08 $15.91 $13.89 $18.49 $(171.18) $(17.07) Goodwill and other intangible asset impairment - - - - - - 17.45 - - - - - - - - - - - - - - - - - - 136.26 - - - Debt extinguishment and refinancing costs - - - - - - - - - - - - 1.45 - - - - - - - - - - - - 21.70 - - - Lower of cost or market adjustment - - - - - - - - - - - - - - - - - - - - - - - - 0.45 5.85 - - - Convertible preferred stock beneficial conversion feature - - - - - - - - - - - - - - - - - - - - - - - - - - - 2.39 13.73 Change in control charges - - - - - - - - - - - - - - - - - - - - - - - - - - - 1.56 - - - Restructuring charge - - - 0.48 - - - - - - - - - - - - - - - - - - 0.15 1.27 0.12 Asset impairment - - - - - - - - - - - - - - - - - - - - - - - - - - - 0.88 0.03 Interest rate swap - - - - - - - - - - - - - - - - - - - - - - - - - - - 0.43 - - - Environmental and other contingency adjustments - - - - - - - - - - - - - - - - - - - - - - - - - - - 0.16 0.01 Gain on embedded derivative - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (0.03) Executive retirement costs - - - - - - - - - - - - - - - - - - - - - - - - 0.45 - - - - - - Group medical benefit - - - - - - - - - - - - - - - (0.30) - - - - - - - - - - - - - - - Adoption of FAS 123 (R) - - - - - - - - - - - - - - - - - - 0.50 - - - - - - - - - - - - "Adjusted" diluted earnings (loss) per share a,b $12.15 $5.03 $8.40 $6.00 $12.65 $11.78 $16.41 $13.89 $19.54 $(0.68) $(3.21) a The Company discloses a tabular comparison of "Adjusted" earnings (loss) per diluted share and net income (loss), which are non-GAAP measures because they are referred to in the text of our press releases and are instrumental in comparing the results from period to period. "Adjusted" diluted earnings (loss) per share and net income (loss) should not be considered in isolation or as a substitute for earnings (loss) per diluted share and net income (loss) as reported on the face of our statement income. b On March 5, 2010, the Company filed an amendment to its Certificate of Incorporation to effect the Reverse Stock Split at an exchange ratio of 1-for-5. As such, we have retrospectively adjusted basic and diluted earnings per share, common stock, stock options, and common stock equivalents for the reverse stock split in all periods presented.

44 2009 Recapitalization * On March 5, 2010, the Company filed an amendment to its Certificate of Incorporation to effect the Reverse Stock Split at an exchange ratio of 1-to-5. As such, we have retrospectively adjusted the shares of common stock.

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Net income (loss) applicable to common shares, GAAP basis $44,407 $16,535 $(33,773) $22,800 $44,890 $51,337 $68,946 $58,568 $73,278 $(753,633) $(311,227) Goodwill and other intangible asset impairment - - - - - - 65,087 - - - - - - - - - - - - - - - - - - 599,966 - - - Debt extinguishment and refinancing costs - - - - - - - - - - - - 5,766 - - - - - - - - - - - - 95,559 (49) Lower of cost or market adjustment - - - - - - - - - - - - - - - - - - - - - - - - 1,687 25,773 - - - Convertible preferred stock beneficial conversion feature - - - - - - - - - - - - - - - - - - - - - - - - - - - 10,526 250,294 Change in control charges - - - - - - - - - - - - - - - - - - - - - - - - - - - 6,880 - - - Restructuring charge - - - 1,745 - - - - - - - - - - - - - - - - - - 652 5,576 2,296 Asset impairment - - - - - - - - - - - - - - - - - - - - - - - - 97 3,875 696 Interest rate swap - - - - - - - - - - - - - - - - - - - - - - - - - - - 1,893 - - - Environmental and other contingency adjustments - - - - - - - - - - - - - - - - - - - - - - - - - - - 687 116 Gain on embedded derivative - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (609) Executive retirement costs - - - - - - - - - - - - - - - - - - - - - - - - 1,748 - - - - - - Group Medical Benefit - - - - - - - - - - - - - - - (1,250) - - - - - - - - - - - - - - - Adoption of FAS 123 (R) - - - - - - - - - - - - - - - - - - 2,116 1,748 - - - - - - - - - "Adjusted" net income (loss) applicable a to common shares $44,407 $18,280 $31,314 $22,800 $50,656 $50,087 $71,062 $60,316 $77,462 $(2,898) $(58,483) a The Company discloses a tabular comparison of "Adjusted" earnings (loss) per diluted share and net income (loss), which are non-GAAP measures because they are referred to in the text of our press releases and are instrumental in comparing the results from period to period. "Adjusted" diluted earnings (loss) per share and net income (loss) should not be considered in isolation or as a substitute for earnings (loss) per diluted share and net income (loss) as reported on the face of our statement income. 45 Adjusted Net Income (Loss) Applicable to Common Shares

Note: Adjusted EBITDA is defined in the Company's credit facilities, as amended from time to time. ($ in thousands) Net Income (Loss) Income Taxes Interest Expense Depreciation & Amortization Stock-Based Compensation Goodwill & Other Intangible Asset Impairment Cash Restructuring Charges Transaction Costs Lower of Cost or Market Adjustment, Net Asset Impairments (recovery) Gain on Embedded Derivative Pre-Acquisition Contingency Adjustment ADJUSTED EBITDA Q1 2008 6,100 3,823 8,522 9,144 2,871 - - - - 226 - - - - - - - - - - - - - - - - - - - - 30,686 Q2 2008 13,466 8,537 7,748 8,645 3,442 - - - - 640 - - - - - - - - - - - - - - - - - - - - 42,478 Q3 2008 30,494 18,554 7,463 8,665 1,563 - - - - 43 - - - - - - - - - - - - - - - - - - - - 66,782 Q4 2008 23,218 17,092 7,761 8,334 1,628 - - - - 150 - - - - 2,739 157 - - - - - - - - 61,079 Q1 2009 (529,981) (34,861) 6,623 8,324 1,372 517,628 2,479 - - - - 29,378 623 - - - - - - - - 1,585 Q2 2009 Q3 2009 Q4 2009 2,607 1,825 6,487 7,586 1,241 - - - - 1,213 401 - - - - 26 - - - - - - - - 21,386 (101,851) (7,495) 9,578 7,640 1,045 - - - - 1,564 107,718 - - - - 347 - - - - - - - - 18,546 (121,571) (16,382) 6,168 8,436 1,177 104,936 3,796 629 10,608 5,295 - - - - - - - - 3,092 a On October 20, 2009, the Company amended and restated its Term Note facility which defines adjusted EBITDA. Adjusted EBITDA excludes non-cash charges for goodwill and other asset impairments, lower of cost or market charges and stock compensation as well as certain non-recurring charges. As such, the historical information is presented in accordance with the definition above. Concurrent with the amendment and restatement of the term note facility, the Company entered into an Asset-Backed Lending facility which has substantially the same definition of adjusted EBITDA except that the ABL facility caps certain non-recurring charges. The Company is disclosing adjusted EBITDA, which is a non-GAAP measure, because it is used by management and provided to investors to provide comparability of underlying operational results. a, b Q1 2010 (10,486) (5,779) 4,507 7,522 801 - - - - 524 174 - - - - 1,029 (919) - - - - (2,627) a, b a, b a, b a, b a, b a, b a, b b Amounts have been retrospectively adjusted as a result of the adoption, effective November 2, 2009, of ASC Subtopic 470-20, "Debt with Conversion and Other Options" as well as certain additional reclassifications due to the further integration of RCC and the rationalization of our operations Q2 2010 (7,656) (5,536) 4,670 7,479 1,403 - - - - 829 - - - - - - - - (116) (4) - - - - 1,069 a, b Q3 2010 (3,299) (221) 4,392 7,457 1,374 - - - - 551 - - - - - - - - (64) (7) - - - - 10,183 b Q4 2010 (5,436) (1,794) 4,258 7,309 1,375 - - - - 1,628 (250) - - - - 221 (7) 178 7,482 46 Reconciliation of Quarterly Adjusted EBITDA to Net Income (Loss)

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Net Income (Loss) 37,318 44,577 44,407 16,535 (33,773) 22,800 44,890 51,337 68,946 58,568 73,278 (750,796) (26,877) Income Taxes 24,531 32,294 32,866 16,151 19,970 14,758 29,767 37,383 42,213 37,879 48,006 (56,913) (13,330) Interest Expense 20,756 35,449 39,069 33,090 21,591 19,777 15,126 16,931 27,353 36,468 31,494 28,856 17,827 Depreciation & Amortization 17,818 28,542 33,487 34,866 22,883 23,007 22,974 24,488 30,292 34,697 34,788 31,986 29,767 401(k) Stock Contributions 2,219 4,144 3,677 3,491 3,581 3,229 5,080 3,849 - - - - -- - - - - - - - - - Stock-Based Compensation - - - - - - - - - - - - - - - - - - 683 3,684 7,161 8,610 9,504 4,835 4,953 Goodwill & Other Intangible Asset Impairment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 622,564 - - - Cash Restructuring Charges - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1,059 9,052 3,532 Transaction Costs - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 108,748 (76) Lower of Cost or Market Adjustment, Net - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2,739 39,986 - - - Asset Impairment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 157 6,291 1,070 Non-Cash Real Estate Write Down,Net of Tax - - - - - - - - - 1,330 391 - - - - - - - - - - - - - - - - - - - - - Debt Refinancing - - - 1,001 - - - - - - 808 - - - 9,879 - - - - - - - - - - - - - - - - - - Cumulative Effects of Accounting Change,Net of Tax - - - - - - - - - - - - 65,087 - - - - - - - - - - - - - - - - - - - - - - - - Embedded Derivative - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (937) Pre-Acquisition Contingency Adjustment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 178 ADJUSTED EBITDA 102,642 146,007 153,506 105,463 100,147 83,962 128,399 137,672 175,965 176,222 201,025 44,609 16,107 Note: Adjusted EBITDA is defined in the Company's credit facilities, as amended from time to time. a Includes a pre-tax non-cash charge of $67.4 million from adopting SFAS No. 142, Goodwill and Other Intangible Assets. b On October 20, 2009, the Company amended and restated its Term Note facility which defines adjusted EBITDA. Adjusted EBITDA excludes non-cash charges for goodwill and other asset impairments, lower of cost or market charges and stock compensation as well as certain non-recurring charges. As such, the historical information is presented in accordance with the definition above. Concurrent with the amendment and restatement of the term note facility, the Company entered into an Asset-Backed Lending facility which has substantially the same definition of adjusted EBITDA except that the ABL facility caps certain non-recurring charges. The Company is disclosing adjusted EBITDA, which is a non-GAAP measure, because it is used by management and provided to investors to provide comparability of underlying operational results. a a b b b 47 Reconciliation of Annual Adjusted EBITDA To Net Income (Loss)

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Operating income (loss), GAAP basis 79,309 108,442 113,670 64,825 72,224 57,163 96,976 104,470 137,985 131,720 154,826 (683,318) (24,587) Goodwill and other intangible impairments - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 622,564 - - - Goodwill amortization - - - 11,208 11,468 12,232 - - - - - - - - - - - - - - - - - - - - - - - - - - - Lower of cost or market charge - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2,739 39,986 - - - Change in control charges - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11,168 - - - Restructuring charges - - - - - - - - - 2,815 - - - - - - - - - - - - - - - - - - 1,059 9,052 3,532 Asset impairments - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 157 6,291 1,070 Executive retirement - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2,852 - - - - - - Environmental and other contingency adjs. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1,115 178 Nonrecurring acquisition expense 2,060 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Adjusted operating income (loss) (a) 81,369 119,650 125,138 79,872 72,224 57,163 96,976 104,470 137,985 131,720 161,633 6,756 (19,807) b, c b, c b b (in thousands) a The Company discloses a tabular comparison of Adjusted operating income (loss), which is a non-GAAP measure because it is instrumental in comparing the results from period to period. Adjusted operating income (loss) should not be considered in isolation or as a substitute for operating income (loss) as reported on the face of our statement of income. b Amounts have been retrospectively adjusted as a result of the adoption, effective November 2, 2009, of ASC Subtopic 470-20, "Debt with Conversion and Other Options." c Amounts have been retrospectively adjusted as a result of certain reclassifications due to the further integration of RCC and the rationalization of our operations. 48 Reconciliation of Operating Income (Loss) to Adjusted Operating Income (Loss) Excluding Special Charges

Operating income (loss), GAAP basis Goodwill and other intangible asset impairment Lower of cost or market charge Change in control charges Restructuring charges Asset impairments Environmental and other contingency adjustments "Adjusted" operating income (loss) a $(99,689) 98,959 8,102 - - - - 103 - - - - - - - - $ 7,475 $(130,039) 147,239 17,152 - - - - 1,306 714 - - - - $ 36,372 $(389,007) 376,366 14,732 - - - - 7,440 4,368 1,115 $ 15,014 $(64,583) - - - - - - - - 11,168 203 1,209 - - - - $(52,003) a The Company discloses a tabular comparison of "Adjusted" operating income (loss), which is a non-GAAP measure because it is referred to in the text of our press release and is instrumental in comparing the results from period to period. "Adjusted" operating income (loss) should not be considered in isolation or as a substitute for operating income (loss) as reported on the face of our statement of income. For the Year Ended October 31, 2010 For the Year Ended November 1, 2009 $(683,318) 622,564 39,986 11,168 9,052 6,291 1,115 $ 6,858 Metal Coil Coating Metal Components Engineered Building Systems Corporate Consolidated Metal Coil Coating Metal Components Engineered Building Systems Corporate Consolidated Operating income (loss), GAAP basis Restructuring charges Asset impairments Pre-acquisition contingency adjustment "Adjusted" operating income (loss) a $16,166 - - - - - - - - - - - - 16,166 $26,791 510 147 - - - - $ 27,448 $(18,438) 3,022 923 178 $ (14,315) $(49,106) - - - - - - - - - - - - $(49,106) $(24,587) 3,532 1,070 178 $ (19,807) 49 Reconciliation of Operating Income (Loss) to Adjusted Operating Income (Loss) Excluding Special Charges

39,031 26,223 12,808 3,119 86,806 16,668 70,138 1,791 101,938 2,677 99,261 5,818 227,775 45,568 182,207 12,732 ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) 62,275 42,893 19,382 2,687 145,167 21,804 123,363 9,519 226,224 7,655 218,569 20,463 433,666 72,352 361,314 18,510 ( ) ( ) ( ) ( ) Metal Coil Coating Total Sales Inter-segment Third Party Sales Operating Profit (Loss) Metal Components Total Sales Inter-segment Third Party Sales Operating Profit (Loss) Engineered Building Systems Total Sales Inter-segment Third Party Sales Operating Profit (Loss) Consolidated Total Sales Inter-segment Third Party Sales Operating Profit (Loss) Q1 2008 14% 5% 14% 34% 34% 8% 52% 61% 9% 100% 100% 5% ($ in thousands) Q1 2010 17% 7% 24% 38% 38% 3% 45% 55% 6% 100% 100% (7%) a Includes special charges: $517.6 million related to goodwill and intangible asset impairments; $29.4 million related to inventory lower of cost or market write downs; and $3.1 million related to plant closings and restructuring. a 41,501 30,077 11,424 63,760 121,480 20,438 101,042 128,607 151,848 4,511 147,337 352,214 314,829 55,026 259,803 557,833 Q1 2009 13% 4% (558%) 39% 39% (127%) 48% 57% (238%) 100% 100% (214%) b Amounts have been retrospectively adjusted as a result of certain reclassifications due to the further integration of RCC and the rationalization of our operations. b b b 50 Reconciliation of Segment Sales to Third Party Segment Sales

( ) ( ) ( ) ( ) 44,759 27,663 17,096 4,092 95,069 20,693 74,376 5,613 113,403 3,302 110,101 5,649 253,231 51,658 201,573 9,157 83,790 53,886 29,904 7,211 181,875 37,361 144,514 7,404 215,341 5,979 209,362 11,467 481,006 97,226 383,780 21,889 ( ) ( ) ( ) ( ) ( ) 14% 5% n/a 38% 39% n/a 48% 56% n/a 100% 100% n/a 18% 8% 24% 37% 37% 8% 45% 55% n/a 100% 100% n/a ( ) ( ) ( ) ( ) ( ) ( ) 15% 5% n/a 37% 39% n/a 48% 56% n/a 100% 100% n/a 142,446 95,776 46,670 9,385 310,551 47,835 262,716 24,689 485,504 17,806 467,698 45,789 938,501 161,417 777,084 48,048 80,171 52,883 27,288 6,698 165,384 26,031 139,353 15,170 259,280 10,151 249,129 25,326 504,835 89,065 415,770 29,538 Metal Coil Coating Total Sales Inter-segment Third Party Sales Operating Profit(Loss) Metal Components Total Sales Inter-segment Third Party Sales Operating Profit(Loss) Engineered Building Systems Total Sales Inter-segment Third Party Sales Operating Profit(Loss) Consolidated Total Sales Inter-segment Third Party Sales Operating Profit(Loss) Q2 2008 YTD Q2 2008 15% 6% 20% 33% 34% 9% 52% 60% 10% 100% 100% 6% 16% 7% 25% 33% 33% 11% 51% 60% 10% 100% 100% 7% ($ in thousands) Q2 2010 YTD Q2 2009 17% 8% 24% 38% 37% 5% 45% 55% n/a 100% 100% n/a ( ) Includes special charges: $104.9 million related to goodwill and intangible asset impairments ($622.6 million YTD); $10.6 million related to inventory lower of cost or market write downs ($40.0 million YTD); and $9.1 million related to plant closings and restructuring ($12.2 million YTD). a a ( ) ( ) ( ) ( ) ( ) 39,526 27,313 12,213 42,982 101,554 14,874 86,680 28,117 128,795 3,407 125,388 46,350 269,875 45,594 224,281 132,018 ( ) ( ) ( ) ( ) ( ) ( ) ( ) Q2 2009 YTD Q2 2010 81,027 57,390 26,637 106,742 223,034 35,312 187,722 156,724 280,643 7,918 272,725 398,564 584,704 100,620 484,084 689,851 ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) a b b b b Amounts have been retrospectively adjusted as a result of certain reclassifications due to the further integration of RCC and the rationalization of our operations. b b b 51 Reconciliation of Segment Sales to Third Party Segment Sales

( ) ( ) ( ) ( ) ( ) ( ) ( ) 233,177 158,618 74,559 20,737 513,377 82,202 431,175 56,860 777,631 29,274 748,357 74,295 1,524,185 270,094 1,254,091 103,745 ( ) ( ) ( ) ( ) 44,256 28,196 16,060 1,016 113,216 17,134 96,082 13,128 129,819 4,101 125,718 9,042 287,291 49,431 237,860 10,227 ( ) ( ) ( ) ( ) c Includes special charges: $ 0.5 million related to plant closings and restructuring ($2.7 million YTD). 134,990 87,201 47,789 12,412 297,382 63,451 233,931 17,971 356,787 9,435 347,352 14,579 789,159 160,087 629,072 20,813 15% 6% 28% 34% 34% 13% 51% 60% 10% 100% 100% 8% 51,200 33,315 17,885 5,201 115,507 26,090 89,417 10,567 141,446 3,456 137,990 3,112 308,153 62,861 245,292 1,076 125,283 85,586 39,697 105,726 336,250 52,446 283,804 143,596 410,462 12,019 398,443 389,522 871,995 150,051 721,944 679,624 14% 6% n/a 39% 39% n/a 47% 55% n/a 100% 100% n/a Metal Coil Coating Total Sales Inter-segment Third Party Sales Operating Profit(Loss) Metal Components Total Sales Inter-segment Third Party Sales Operating Profit(Loss) Engineered Building Systems Total Sales Inter-segment Third Party Sales Operating Profit(Loss) Consolidated Total Sales Inter-segment Third Party Sales Operating Profit(Loss) Q3 2008 YTD Q3 2008 ($ in thousands) Q3 2010 YTD Q3 2009 Includes special charges: $104.9 million related to goodwill and intangible asset impairments ($622.6 million YTD); $10.6 million related to inventory lower of cost or market write downs ($40.0 million YTD); and $9.1 million related to plant closings and restructuring ($12.2 million YTD). Q3 2009 YTD Q3 2010 15% 7% 6% 40% 40% 14% 45% 53% 7% 100% 100% 4% 90,731 62,842 27,889 11,352 202,826 34,367 168,459 32,171 292,127 11,468 280,659 28,506 585,684 108,677 477,007 55,697 ( ) ( ) ( ) ( ) 15% 6% 41% 35% 35% 19% 50% 59% 10% 100% 100% 12% a ( ) a ( ) ( ) ( ) ( ) ( ) a 17% 7% 29% 37% 37% 12% 46% 56% 2% 100% 100% 1% 17% 8% n/a 38% 37% n/a 45% 55% n/a 100% 100% n/a ( ) ( ) ( ) ( ) ( ) ( ) c c c c b Amounts have been retrospectively adjusted as a result of certain reclassifications due to the further integration of RCC and the rationalization of our operations. b b 52 Reconciliation of Segment Sales to Third Party Segment Sales

181,874 (116,634) 65,240 16,166 415,857 (87,780) 328,077 26,791 490,746 (13,537) 477,209 (18,438) 1,088,477 (217,951) 870,526 (24,587) 46,884 (29,433) 17,451 3,754 118,475 (24,329) 94,146 8,820 133,959 ( 4,102) 129,857 (3,859) 299,318 (57,864) 241,454 (3,774) Metal Coil Coating Total Sales Inter-segment Third Party Sales Operating Profit (Loss) Metal Components Total Sales Inter-segment Third Party Sales Operating Profit (Loss) Engineered Building Systems Total Sales Inter-segment Third Party Sales Operating Profit (Loss) Consolidated Total Sales Inter-segment Third Party Sales Operating Profit (Loss) Q4 2010 YTD Q4 2010 17% 7% 25% 38% 38% 8% 45% 55% - -4% 100% 100% - -3% 16% 7% 22% 39% 39% 9% 45% 54% - -3% 100% 100% - -2% ($ in thousands) Includes special charges: goodwill and intangible asset impairments ($622.6 million YTD); inventory lower of cost or market write downs ($40.0 million YTD); $11.2 million change of control charges ($11.2 million YTD); $1.9 million related to plant closings and restructuring ($15.3 million YTD); and $1.1 million environmental and other contingency adjustments ($1.1 million YTD.) 72,480 (50,082) 22,398 8,575 201,878 (33,043) 168,835 25,242 331,484 (14,068) 317,416 33,857 605,842 (97,193) 508,649 51,202 Q4 2008 12% 4% 38% 33% 33% 15% 55% 63% 11% 100% 100% 10% 305,657 (208,700) 96,957 29,312 715,255 (115,245) 600,010 82,102 1,109,115 (43,342) 1,065,773 108,152 2,130,027 (367,287) 1,762,740 154,947 YTD Q4 2008 14% 5% 30% 34% 34% 14% 52% 61% 10% 100% 100% 9% a a b b Amounts have been retrospectively adjusted as a result of certain reclassifications due to the further integration of RCC and the rationalization of our operations. b 44,614 (31,122) 13,492 6,037 122,484 (17,156) 105,328 13,557 128,476 ( 3,988) 124,488 515 295,574 (52,266) 243,308 (3,694) 15% 6% 45% 41% 43% 13% 44% 51% 0% 100% 100% - -2% Q4 2009 b 169,897 (116,708) 53,189 (99,689) 458,734 (69,602) 389,132 (130,039) 538,938 (16,007) 522,931 (389,007) 1,167,569 (202,317) 965,252 (683,318) 15% 5% - -187% 39% 40% - -33% 46% 55% - -74% 100% 100% - -71% YTD Q4 2009 b 53 Reconciliation of Segment Sales to Third Party Segment Sales

Sustainability appendix Green and Energy Efficiency

55 Environmental and Energy Efficiency Large municipalities continue to adopt Cool Roof and/or LEED as permit requirements Dallas, TX Philadelphia, PA Chicago, IL California 2008 Building Energy Efficiency standards adopted January 1st with low and steep slope cool roof requirements California Green Building Standards (CalGreen) requires an additional 15% energy reduction for state buildings ASHRAE 189.1 adoption has been slower than expected International Green Construction Code (IgCC) continues to be developed and our industry is heavily involved. Scheduled to publish in early 2012. Will likely have Cool Roof and Air Barrier requirements

NCI Green Benefits 56 Metal construction products: Have 25%-35% post-consumer recycled content Are highly durable and have long life spans Are Virtually 100% recyclable Through the use of Cool Roof colors with improved solar reflectivity and emissivity values we are able to: Reduce the heat island effect, which increases environmental temperatures and exacerbates pollution Lower energy consumption in warmer climates Insulated Metal Panels provide higher R-Values per inch, insulation continuity, and a continuous air barrier, increasing energy efficiency. Using less energy: Decreases Green House Gas emissions Lowers operating costs Reduces dependence on foreign fuel Environmental Economic Health and Community

Regulatory Requirements 57 The building envelope is being required to support many of the regulatory demands to increase energy efficiency for the complete building system. The reduction of air infiltration is the next major step in code requirements towards improving the energy efficiency of a building envelope. NCI manufactures products that meet these requirements today. R-Value Source: American Society of Heating Refrigeration, and Air Conditioning Engineers, Energy Standard for Buildings Except Low-Rise Residential Buildings, Versions as noted. Note: These values are based on averages of all construction types, excluding mass walls and attics, of a representative climate zone (4). Assembly Air Filtration Sources: American Society of Heating Refrigeration, and Air Conditioning Engineers, Energy Standard for Buildings Except Low-Rise Residential Buildings, Addendum bf, First Public Review, June 2009. MBCI Engineering technical Bulletin Nos. 202-01-00 and 175-01-97, Revised 02-27-2002.. Note: Air infiltration volumes are measured at reference pressures that sometimes don't match depending on the applicable standard. In order to compare values, infiltration rates shown have been normalized to ASHRAE's reference pressure of 1.57 psf. Actual data ran at the reference pressure will vary somewhat from this. NCI is an authorized reseller of Metl-Span panels. (r) (r) (r) R-Value Trends in ASHRAE 90.1 Assembly Air Infiltration

Source: Athena Institute EcoCalculator, Version 3.3 for low-rise construction in ASHRAE 90.1 Climate Zone 3, obtained from http://www.athenasmi.org/tools/ecoCalculator/downloadEcoCalculator.php Note: Data shown is for framing (columns and beams) only. Data has been normalized to performance of Pre-Engineered Building System (Short Span) which will have a value of 1.0 for all impacts accordingly. Less More Impact Level 58 Life Cycle Assessment LCA Impacts for Various Types of Framing

59 Photovoltaic Systems Solar photovoltaic systems are quite suitable to metal roofs, lowering the lifetime cost per watt. Decreased installation expense Roof and module life span compatibility Lower risk due to the lack of roof penetrations These systems can be sold in three ways depending on size and viability as a Power Purchase Agreement (PPA) project: Predesigned kits Custom designed systems Turnkey PPAs through a partner Thin Film Crystalline

Photovoltaic Systems Improved efficiency in low or inclined light conditions Factory Applied Approximately 6 Watts per square foot rated capacity More efficient in bright/direct sun Inexpensive and readily available locally Approximately 12 Watts per square foot rated capacity Actual production can be predicted and design optimized using solar modeling software. The cost per watt of these two systems varies from $4.75/Watt to $3.00/Watt as the system size increases. Thin Film Crystalline 60

61 Photovoltaic Systems Metal is the only roof material that outlives PV system Saves cost of removal and replacement involved with other roof materials Penetration-free mounting Crystalline modules are mechanically connected Thin-film modules are adhered Rail systems typically used on flat roof systems can be eliminated. Price point can be justified because it protects a valuable asset Advantages of Metal Roofs

10943 North Sam Houston Parkway West Houston, Texas 77064 www.ncilp.com 010311