Not all flashing products are compatible. Learn how to choose tapes, sealants, and membranes that ensure long-term adhesion and continuity across building envelope systems.
Overview
Flashings and transition materials are critical in connecting windows, doors, joints, and dissimilar substrates. Product compatibility, UV resistance, elongation, and durability must all be considered. This article outlines key flashing categories and when to use each.
Material Categories
- Rubberized asphalt tapes (economical, but limited UV resistance)
- Butyl and acrylic tapes (better adhesion and aging)
- Liquid flashings (fill irregular substrates and gaps)
- Sill pan systems and corner boots
🔍 Quick Picks
- High-Bond Flashing Tape:Â 3M All Weather Flashing Tape
- Liquid Flashing Kit:Â Tremco ExoAir Liquid Flashing
- Sill Pan System:Â SureSill Window Sill Pan Kit
Conclusion
Detailing continuity with the right flashing materials ensures long-term envelope integrity. Choose systems tested for your climate, substrates, and connection complexity.
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Compatibility and Sequencing
It’s not enough to choose a high-quality flashing tape—compatibility with sealants, WRBs, and substrates matters. Always confirm chemical and adhesion compatibility using manufacturer-published technical bulletins. In the field, use primer where necessary and follow required lap shingle sequencing from bottom to top.
