- Foam/tape method
- Filling the void between the window frame and the rough stud
- Polyurethane spray foam serves as the air barrier
- Use low expansion spray foam to avoid excessive pressure on the frame
- If spray foam is cut and trimmed, additional sealant like tape will be required to ensure a sealed barrier is installed
- Add tape to the exterior of the foam to seal the sheathing to the window.
- Plywood wrap method
- Used for metal and PVC windows
- Seal wood panel sheathing liner at interior edge to the wall with polyethylene or drywall
- often uses gaskets and sealants for connections
- Drywall method
- Commonly used with wood windows
- Opening is sealed with drywall caulked to the window frame
- often uses gaskets and sealants for connections