Roof Deck Protection

What This Service Involves

Roof deck protection refers to the full assembly of leak barriers and underlayment that keeps your wood decking dry beneath the finished roof. In the Pacific Northwest, where roofs stay damp for weeks at a time, a properly layered deck system is what prevents the rot, mold, and sheathing failure we see on neglected roofs. We combine self-adhered barriers at the high-risk zones with a continuous underlayment field so no part of the deck is left exposed to intrusion. The result is a warrantable, integrated system rather than a patchwork of loose materials.

Benefits

Creates a continuous moisture barrier over the entire roof deck; Prevents sheathing rot and mold in consistently damp attics; Combines eave, valley, and field protection into one integrated system; Helps qualify the roof for enhanced manufacturer system warranties; Reduces the risk of interior leaks during prolonged wet spells

Our Process

1) Strip the roof and inspect every sheet of decking for damage; 2) Replace compromised sheathing and secure the deck; 3) Apply leak barriers to eaves, valleys, and penetrations first; 4) Cover the remaining field with lapped underlayment to complete the system

What Affects the Cost

Total roof area needing full-system coverage; Combination of leak barrier and underlayment products selected; Extent of decking replacement found during tear-off; Roof complexity with multiple planes, valleys, and details; Height and access constraints affecting labor

Best Time of Year

A full deck protection system is best installed during a dry stretch so the sheathing stays dry between tear-off and final cover.