While tile is ultimately the first line of defense against the elements on a roof installation, underlayments play a critical role by providing a secondary level of waterproofing protection directly on top of the wood roof deck. As a crucial barrier that contributes to the performance and longevity of the entire roof system, it is important to choose the right underlayment for your roof and your particular climate.
Westlake Royal Roof Mastic
Advanced elastomeric flashing cement formulated to provide ultimate adhesion and waterproofing with Westlake Royal TileSeal™ HT, Westlake Royal™ MetalSeal HT and similar polyester faced underlayments.
Citadel® PRO
Citadel®PRO SBS modified asphalt core self-seals around nail or screw penetrations when mechanically fixing roofing. Seals to the roof deck provide additional security agains potential leaks compared to mechanically fastened base sheets.
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