Underlayments - Question & Answers

What is the exposure time to sunlight for WIP?

Which CCW Water & Ice Protection product should I use under a metal roof?
What is the difference between 300HT and 403HR?
Can CCW WIP be used in vertical applications under metal wall panels?

What product would you recommend for a 2” sloped roof?

Can water seep through CCW WIP once roofing nails puncture it?

What is the exposure time to sunlight for WIP?
WIP 100 – 14 days
WIP 200 – 30 days
WIP 300HT – 30 days
WIP 400LT – 30 days
WIP 403HR – 30 days
Back

Which CCW Water & Ice Protection product should I use under a metal roof?
Use CCW WIP 300HT or WIP 403HR under metal roofing. Back

What is the difference between 300HT and 403HR?
300HT is rubberized asphalt on a 4 mil poly, whereas 403HR is butyl-modified asphalt on a 6.5 mil poly. Back
 

Can CCW WIP be used in vertical applications under metal wall panels?
Yes, 300HT or 403HR are commonly used vertically under metal wall panels. CCW-702 Primer should be applied first to ensure proper adhesion. Back

What product would you recommend for a 2” sloped roof?
For low-sloped roofs, use WIP-400 or WIP 403HR. Back

Related

Steep-slope roof systems require different underlayment installations

When specifying steep-slope roof systems, match underlayments with a roof's slope and anticipated service life. In addition, climate, manufacturers' warranties, fire ratings and building codes should be addressed

Joan P. Crowe, AIA  describes function, design considerations and current NRCA recommendations for the use of underlayments with different steep-slope roof coverings.

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