Tips for Installing Rigid Foam Insulation Tips for Installing Rigid Foam Insulation

Rigid foam insulation can be used in different structure applications such as walls, roofs, floors, foundations, doors, or basements. It is an effective way of saving energy and improving moisture resistance in a home or building. The material is found in three main groups which include extruded polystyrene, molded polystyrene, and polyisocyanurate and polyurethane.

Installation in Basements

Insulating basements reduces heat conduction from warm living areas to the cold foundation walls. In cold climate regions, use rigid foam insulation with the highest R-value. Polystyrene or polyurethane is recommended as it is water proof too. It is also advisable to put mechanisms to prevent pests and insects from attacking the material.

Prepare the Surface for Mounting

Insure that the surface is dry and moisture free. If it is prone to moisture problems, reconstruct the area to solve the fault. Apply a water sealer as well to enhance water resistance. The surface can be finished off with a pest or insect repellent paint or vanish.


To obtain the correct size for rigid foam insulation to install on a surface, measure and cut it with a sharp knife and a goof straight edge. Attach the furring strips on the surface and make sure they are secure. Take care of the width between two furring strips, too much can cause the foam insulation not to hang properly.

When installing the foam, leave very little space between the material and the board or floor. If there is any space left, caulk or tape it to ensure maximum insulation.s


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