ThermalBuck

The ThermalBuck is an innovative high-performance window and door buck designed to extend the building’s insulation layer right to the rough opening. Made from a high-density, closed-cell foam core with a waterproof coating, it eliminates thermal bridging, improves energy efficiency, and protects against moisture damage.

ThermalBuck is lightweight, easy to cut, and installs quickly, making it a practical solution for high-performance construction. It’s compatible with all types of cladding and integrates seamlessly with weather barriers and flashing systems.

Installing windows on a building with exterior insulation isn’t easy. The window and the rigid foam or mineral wool need to line up on the same plane for good drainage, proper cladding attachment, and to prevent compression of the insulation. Rough openings have always been the weakest spot on any building for air and water infiltration, and “bumping” the window out only makes it more difficult to achieve a good air and water seal.

 

ThermalBuck solves the challenge of installing nail flange windows & doors with exterior insulation by extending the mounting point to create a flush plane for cladding. It also insulates the rough opening, limiting thermal bridging around windows & doors.