Window Rough Opening Prep for High-Performance Windows

Posted May 8, 2026

Built by Finlay Butler

01 · ABOUT THIS PROJECT

Built by

Finlay Butler

I prepared rough openings for high-performance window and door installation using advanced air sealing and waterproofing membranes. Working on site with Greening Homes and VETTA Windows & Doors, I flashed the window sills using EXTOSEAL ENCORS stretchable butyl adhesive tape. For the head and side jambs of the window bucks, I pre-applied VISCONN liquid air barrier to ensure continuous vapour-permeable, waterproof protection and a rapid final installation.

SCOPE AND TRADES ON THIS BUILD

Air Sealing

Waterproofing

passive house door and window installation

Vapour Barrier

Basic Flashing

02 · PHOTOS

Measuring a window buck jamb with a tape measure next to flashing tape and an application squeegee.

Window sill rough opening lined with black butyl flashing tape and blue seam sealing tape.

Framed window rough opening buck looking out toward exterior brick and trees.

Timber buck boards with black liquid-applied air barrier coating drying against a wall.

Wooden drying rack holding timber buck pieces coated with black liquid membrane.

Workspace table with rolls of flashing tape, mounting brackets, fasteners, and shims.

High-performance glazed door standing ready for rough opening installation.

Prepared window rough opening with flashed sill, level tool, and staged window frame.

Created: May 8, 2026

03 · DISCUSSION

Dan RobinsonMay 8, 2026

Did you get a chance to meet Chris? I love his vision for responsible building techniques, he is someone you can learn from just by being in the same room!

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PROJECT FACTS

Status

Ready

Posted

May 8, 2026

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