Roof Seam Tape

Roof seam tape is the go-to solution for sealing laps, joints, and penetrations across modern roofing systems. From single-ply membranes to metal panels and self-adhered underlayments, the right tape delivers a watertight, airtight bond that stops leaks, resists weather, and extends roof life. This category includes butyl seam tape, TPO seam tape, EPDM seam tape, PVC cover tape, aluminum-faced metal roof seam tape, and underlayment seam tape for OSB or plywood deck seams.

Key benefits you’ll notice on the roof and at the bottom line:
- Clean installation compared to mastics, reducing labor hours and callbacks.
- Long-lasting waterproof seals that tolerate expansion and contraction.
- Improved energy performance by limiting air infiltration at laps and edges.
- Strong adhesion in a wide temperature range, with UV- and weather-resistant facings.

How to choose roof seam tape:
- Match the tape to the substrate: TPO, EPDM, PVC, modified bitumen, metal, or wood sheathing. Use manufacturer-approved tapes for membranes.
- Pick the adhesive chemistry: high-tack butyl for broad compatibility, acrylic for high heat and UV.
- Size for the joint. Common widths are 2–8 inches; wider tapes add forgiveness and peel strength.
- Check service temperature, elongation, and UV rating for your climate.
- Confirm warranty and code compliance with the roofing system supplier.

Application tips for pro-grade results:
- Clean and dry surfaces; use membrane cleaner and primer where specified.
- Lay tape without stretching; round corners to reduce lift.
- Roll firmly with a silicone or steel hand roller to activate adhesion.
- Overlap ends 1–2 inches and seal terminations if required.
- Test a small area on aged or coated surfaces.
- Store rolls flat, in the shade, and above freezing before use.

With the right roofing seam tape, you can seal lap seams, flash skylights and vents, reinforce ridge and hip details, and create a durable secondary weather barrier—fast, reliable, and built to last.