TRI-BUILT® Underlayment is a high strength woven synthetic roof underlayment that can save you 50% in labor & time expense. TRI-BUILT® Underlayment is stronger and more durable than Type 30# felt.

TRI-BUILT® provides quality residential and commercial building materials that deliver professional results. By focusing on the professional contractor, TRI-BUILT® has become a recognized and trusted leader in the construction industry. From roofing and siding materials, windows, coatings, and more, TRI-BUILT® is a name you can trust at a competitive price.