Door and Window Detail

Flashing Tape

Flashing Tape to Back Edge of Rough Opening

• Corners have 12" long piece, folded around corner. Or use flashing corners
• this example shows flashing tape over rough opening overlapping only about 1.5" of the front face

• Go 6" up from sill pan [1]
• Requirement is that flashing tape (self-sealing) extend beyond the window/opening flange. Since most flanges are under 2", that means 4" tape will do - to cover both window opening and to reach the house wrap. [2]

Flashing tape does not go to back of Rough Opening

• Flashing tape vs flashing corners - flex tape is used in video below.
• On sides of window (jamb) - tape is used on top of the nailing flange

Flashing Corners made from the Same Material

• This is part-count reduction friendly, eliminating a specialized product and using multipurpose components for robustness, resilience, and antifragility.
• This uses a chevron-like cutout for the corners.
• The vertical part in this design is weak - the edge can break and let water in.

• Note: the concept is to flash the sill, but under the nailing fin, not above. This allows water inside window to drain out the bottom. This is different than the jambs, where flashing is used above the nailing fin.

Rough Window and Door Opening

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