Seal Window & Door Seams the Right Way

If air or moisture is getting in around window and door openings the issue may be at the seams, joints or transition points around the frame. Flashing and construction tapes help seal these vulnerable areas, supporting a tighter air barrier and better protection against water intrusion.

These tapes are one of the best ways to reinforce window and door openings during repair or replacement work.

Even a well-sealed frame can fail if the surrounding seams and transitions are left exposed.

Common Signs

• Drafts or moisture showing up around the outer edge of a window or door
• Visible gaps at seams, joints or flashing transitions
• Old tape or flashing pulling loose, cracking or peeling
• Water stains or weather damage around openings

Quick Fix Options

• Flashing Tape: Seals window and door flanges, rough openings and transition points
• Construction Tape: Reinforces seams in air barrier and weather-resistant barrier assemblies
• All-Weather Tape: Provides durable sealing in exposed or demanding conditions

Best used during repair or replacement work: Flashing and construction tapes are most effective when sealing rough openings, flanges, sheathing seams or exterior transitions as part of a more complete air and water sealing approach.

Difficulty: Moderate
Time: 30–60 minutes

Choose the right tape below based on the seam, surface or opening you need to seal.