The Ultimate Bracket
Window Jamb Extension Clips
Window Jamb Extension Clips secure the jamb extension to the wall framing and stop the Jamb Extension from bowing when foam or fiberglass insulation is applied and there are no insulation voids.
A set of four clips comes with four 1/2" screws and four 2" screws.
Install 1/2" screws to the Jamb Extension and 2" screws into the wall framing making sure the Jamb Extension is plumb.
FREE SHIPPING on orders over $200 CAD ($150 USD). Tariff charges apply to USA orders.
Benefits of our Window Clips
Provides a professional installation every time.
Easy to Use
Simply fasten the clip to the outside of the jamb extension and fasten the other end to the framing.
No Voids
The clips stop the Jamb Extension from bowing when foam or fiberglass insulation is applied and there are no insulation voids.
Window Clips in Action
The easiest way to install a window with window jamb extension clips and the Ultimate Bracket.

Installing Windows
- No insulation voids for maximum R-value
- No bowing of the window jamb extension
- No drilling through vinyl – which can void warranty