EXHIBIT 99.1

         NOVA Chemicals and Dietrich Metal Framing Form Joint Venture to
                 Produce New, Energy-Efficient Building Systems


      PITTSBURGH--(BUSINESS WIRE)--July 20, 2006--NOVA Chemicals
Corporation (NYSE:NCX) and Dietrich Metal Framing, a Worthington
Industries company (NYSE:WOR), today announced they have formed a
50:50 joint venture that will develop and manufacture durable,
energy-saving composite construction products and systems.
      The joint venture combines Dietrich's expertise in light-gauge
steel framing with NOVA Chemicals' expandable polystyrene (EPS)
technology to produce strong, efficient building systems for
residential and light commercial use.
      "We are very pleased to partner with Dietrich, the industry leader
in metal framing, to introduce construction products that meet the
growing demand for durable, energy-saving structures that are also
cost-effective to build," said Tony Torres, vice president of NOVA
Chemicals' Building and Construction business.
      The joint venture's building products will provide many advantages
to building owners and homeowners over traditional wood construction
including lower heating and cooling costs, improved strength and
durability under adverse weather conditions and resistance to termites
and mold. The joint venture's panelized composite building systems
also are expected to reduce labor costs and time-to-completion over
"stick-built" construction.
      "By combining the extensive experience of NOVA Chemicals and
Dietrich in manufacturing and construction, we can offer innovative
construction products that feature the design advantages and strength
of steel as well as the thermal and sound insulation of EPS," said Ed
Ponko, president of Dietrich Metal Framing.
      The new joint venture is expected to be fully operational by
January 2007 and will have offices in Pittsburgh. Andy Claypole,
currently director of NOVA Chemicals' Building and Construction
business, will serve as president and general manager of the new joint
venture. "We are delighted to introduce construction products that
help builders stay competitive in a dynamic and demanding marketplace
- - and help building owners reduce ownership costs," said Claypole.

      Dietrich Metal Framing, a Worthington Industries company
(NYSE:WOR), operates 26 manufacturing locations throughout the U.S.
and Canada. Dietrich is the leading manufacturer of light-gauge metal
framing and finishing products, systems and services for commercial
and residential construction. Dietrich offers the largest selection of
cold-formed steel framing and drywall finishing products including
drywall and structural metal stud framing, contour flexible track
framing, floor joists, roof trusses, metal lath, fire-rated assemblies
including h-stud for area separation and CT studs for shaft walls.
Dietrich also offers one of the largest selection of clips and
connectors, numerous deflection systems including slotted slip track
and an extensive line of metal, vinyl and paper-faced corner beads and
trims.

      Worthington Industries is a leading diversified metal processing
company with annual sales of nearly $3 billion. The Columbus,
Ohio-based company is North America's premier value-added steel
processor and a leader in manufactured metal products such as
automotive aftermarket stampings, pressure cylinders, metal framing,
metal ceiling grid systems and laser-welded blanks.
      Founded in 1955, the company operates under a long-standing
corporate philosophy rooted in the golden rule, with earning money for
its shareholders as the first corporate goal. This philosophy, an
unwavering commitment to the customer and one of the strongest
employer/employee relationships in American industry, serves as the
company's foundation.

      NOVA Chemicals produces plastics and chemicals that are essential
to everyday life. The company develops and manufactures materials for
customers worldwide that produce consumer, industrial and packaging
products. NOVA Chemicals works with a commitment to Responsible
Care(R) to ensure effective health, safety, security and environmental
stewardship. NOVA shares are traded on the Toronto and New York stock
exchanges as NCX. Visit NOVA Chemicals on the Internet at
www.novachemicals.com.

      Safe Harbor Statement

      The company wishes to take advantage of the Safe Harbor provisions
included in the Private Securities Litigation Reform Act of 1995 ("the
Act"). Statements by the company, which are not historical information
constitute "forward looking statements" within the meaning of the Act.
All forward-looking statements are subject to risks and uncertainties
which could cause actual results to differ from those projected.
Factors that could cause actual results to differ materially include
risks described from time to time in the company's filings with the
Securities and Exchange Commission.

      (Photographs are available upon request.)

      Responsible Care(R) is a registered trademark of the Canadian
Chemical Producers' Association (CCPA) in Canada and is a registered
service mark of the American Chemistry Council (ACC) in the United
States.


    CONTACT: NOVA Chemicals:
             Stephanie Franken, 412-490-4292
             frankes@novachem.com
             OR
             Worthington Industries:
             Cathy M. Lyttle, 614-438-3077
             cmlyttle@worthingtonindustries.com