How To Install Rigid Foam Insulation On Exterior Concrete Walls

Installation the contractor applies a layer of adhesive over the surface of the concrete blocks and then installs a vapor barrier and high density rigid foam board insulation on top of that.

How to install rigid foam insulation on exterior concrete walls.

When the entire surface is covered with the panels measure vertically down one panel so that a mark is made every 24 inches. Remove all the trim from the exterior walls window and door casings baseboards crown molding you name it and rip the drywall and studs off the block walls. Against the concrete surface with the still wet glue place the insulation panels. If necessary address moisture problems and seal cracks before you begin.

Secondly and this is the best way you can install a drywall to frame the wall before applying foam board insulation. Now as you glue the panels to the exposed concrete blocks leave a inch gap at the floor and ceiling and cut holes in the panels to fit around outlets and wall switches. Then to account for the foam s additional thickness add jamb extensions to the windows and doors and fur out around their openings. At each mark make a horizontal line using a carpenter s level.

Firstly you can apply it directly onto the house s concrete walls with the help of a construction adhesive that will hold it in place. The concrete should be dry and free from cracks before installing foam insulation boards. If this happens pull out the sheet and slightly trim down the edges with the saw. There s two ways you can go about with foam board insulation.

Place each rigid foam sheet in its own wall bay.