TruDefinition Duration FLEX

TruDefinition Duration FLEX is a polymer-modified laminated asphalt shingle from Owens Corning for steep-slope roofing in the United States. It appears in the Owens Corning shingle specification as TruDefinition Duration FLEX Impact Resistant (Algae Resistant) Shingles, within the asphalt shingle roofing family.

The shingle uses SBS modified asphalt. It includes SureNail Technology, a woven fabric reinforcing strip in the nailing zone on the top surface.

• Nominal size of each shingle: 13-1/4 in (337 mm) by 39-3/8 in (1000 mm).
• Exposure: 5-5/8 in (143 mm).
• Shingles per square: 64.
• Bundles per square: 3 bundles of 20 or 22 shingles.
• Coverage of a square: 98.4 sq ft (9.1 sq m).

The shingle carries UL 2218 and FM 4473 Class 4 impact resistance.

• ASTM D228
• ASTM D3018 (Type 1)
• ASTM D3161 (Class F wind resistance)
• ASTM D3462
• ASTM D7158 (Class H wind resistance)
• ASTM E108/UL 790 (Class A fire resistance)
• UL 2218 and FM 4473 (Class 4 impact resistance)
• PRI ER 1378E01
• Florida Product Approval
• Miami-Dade County Product Approval

Color is selected from the manufacturer's full range. The algae resistant version is the one named for this shingle.

FLEX is entry M under asphalt shingles in section 07 31 13.13, Fiberglass-Based Asphalt Shingles and Accessories, and follows Duration STORM. Its SBS modified asphalt is the construction detail that sets it apart in the Duration entries.

Other Duration shingles in the same specification are Duration, Duration COOL, Duration COOL Plus, Duration Designer, Duration MAX, Duration STORM and Duration FLEX. These entries are listed with a 13-1/4 in by 39-3/8 in nominal size, a 5-5/8 in exposure and 64 shingles per square.