Rigid Insulation Over Wall And Floor Overhang

Rigid insulation below framing and cavity insulation finish material to underside of overhang.

Rigid insulation over wall and floor overhang. Eps is also the most inexpensive of the three types of rigid foam insulation while also meeting the required building and energy codes. Rockwool rigid stone wool boards used as a continuous layer of insulation under a concrete slab can provide the thermal efficiency and mechanical properties required as an alternative to rigid foam. Measure the size of the opening between the floor joists underneath the cantilevered overhang. Install it anywhere from the roof to the foundation.

For more information about air sealing cantilevered floors see the guide cantilevered floor. Retrofit of cantilevered wall showing details at the outside corner for installing air sealing and rigid foam insulation in the wall and overhanging floor. 6 2 4 frame wall with batt insulation and rigid board insulation. A beam supported on one end in this case by the home while the opposite end overhangs past the exterior wall and carries a load people or floor.

Rigid insulation is one of the best tools to reduce your energy costs. Seal and insulate floors that overhang the foundation. It can be applied on the roof floor and walls and it s most widely used in structural insulated panels and insulated concrete forms. Our inspectors local and state are holding us to a 3 4 to 1 maximum overhang for the sill over the foam.

It is usually possible to remove the finish underneath the overhang and air seal the space between the joists above the foundation with polyurethane foam or with caulked low permeability rigid insulation. Rigid foam insulation also known as insulating boards provide high r values. I have attached a cross section for this home to this post. Our typical home uses 2 6 exterior walls with osb on the exterior.

2 cut pieces of 1 inch nonstructural sheathing board or 1 inch rigid foam sheathing to fit inside the. They keep your home at a comfortable temperature without the need to crank your heat. Eps is by far the most versatile of the three rigid insulation options. You can even place it under the foundation slab.

How to insulate a cantilever overhang.