Channel Vent™ Base Sheet

CertainTeed’s Channel Vent Base Sheet is designed for use as a base sheet for both hot and cold applied SBS modified bitumen, APP modified bitumen or built-up roofing systems where additional venting is desirable. It is suitable for use as the first ply in the construction of various types of roof membrane assemblies for new construction, reroofing and re-cover applications. Channel Vent Base Sheet is used over nailable, non-nailable and insulated substrates. It is particularly suitable for use over lightweight insulating concrete decks, as an underlayment for insulation over monolithic decks, and for recovering over existing roof membranes. When applied as directed, Channel Vent will vent at all eaves, edges and parapet walls by permitting lateral transmission of vapor. The use of roofing vents, spaced one per 600 sq. ft. of roof area, in the field area of the roof completes the ventilation system.

Channel Vent Base Sheet is manufactured using a high performance, fiber glass mat which is impregnated and coated with asphalt on both sides. The bottom surface is covered with mineral granules and then embossed to provide positive channels for the escape of moisture vapor. Venting channels are approximately 1/4" wide, spaced approximately 1-1/4" apart, and run the length of the roll. Channel Vent Base Sheet is dusted with a fine mineral surfacing on the top side.

• Support Mat: A high performance, fiber glass mat
• Back Surface: Fine sand
• Coating: Asphalt
• Product Weight: 78 lbs. per roll
• Dimensions: 39 - 3/8" x 32' 11" (108 square feet)
• Coverage: One Squares
• Thickness: 3.0mm (120 mils)

For additional technical resources please refer to the CertainTeed Commercial Roof Systems Manual or click on the Technical Information link located on the left navigation area.

Roof systems constructed with CertainTeed's Channel Vent Base Sheet as the base ply shall be applied in accordance with installation procedures contained in the CertainTeed Commercial Roof Systems Manual.

Substrates that receive a roof system shall be firmly attached, smooth, dry, clean and free of sharp projections and depressions. Flashing details shall be in place, ready to receive roofing with roof accessories available prior to application of materials. Substrates requiring priming shall be primed with suitable asphalt primer such as FlintPrime™ and be allowed to completely dry. Substrates shall provide positive drainage. Roof insulation shall be tapered to drains.

Outstanding Warranty Options

CertainTeed backs its commercial roofing systems with the confidence of three warranty choices:

Limited Product Warranty
NDL Roof Membrane Limited Warranty*
Integrity Coverage Warranty*

Owners and specifiers who choose the NDL or Integrity Coverage warranty options have the added security of manufacturer involvement in the sometimes difficult process of contractor qualifying and workmanship inspection. Consult with the roofing contractor and your CertainTeed commercial roofing territory manager to decide which CertainTeed warranty is best for your building or project.

*NDL and Integrity Coverage (IC) warranties are not available on all specifications and are only available through CertainTeed Golden and Silver Star Contractors. (IC is only available through CertainTeed Golden Star Contractors.)