Core Natural Resources POS AM Prospectus update (post-effective amendment)

Exhibit 12.1

NCI Building Systems, Inc.

Computation of Ratios of Earnings to Fixed Charges

(in thousands)

	Years Ended										Six Months Ended
	Oct. 31, 2000		Oct. 31, 2001		Nov. 2, 2002		Nov. 1, 2003		Oct. 30, 2004		Apr. 30, 2005
Income from continuing operations	$	44,407	$	16,535	$	31,314	$	22,800	$	44,890	$	21,454
Income taxes for continuing operations		32,866		16,151		19,535		14,758		29,767		14,482
		77,273		32,686		50,849		37,558		74,657		35,936
Fixed charges, as defined:
Interest		39,069		33,090		21,591		19,777		15,126		6,719
Interest component of rentals charged to operating expense		655		657		621		540		469		241
Deferred financing charges		—		—		—		—		9,879		—
Total fixed charges		39,724		33,747		22,212		20,317		25,474		6,960
Earnings, as defined	$	116,997	$	66,433	$	73,061	$	57,875	$	100,131	$	42,896
Ratio of earnings to fixed charges	$	2.95	$	1.97	$	3.29	$	2.85	$	3.93	$	6.16