Insulating Concrete Walls With Foam Board

When gluing the foam board on the concrete walls there will be voids behind the foam board where it doesn t contour exactly to the wall.

Insulating concrete walls with foam board.

Helix is mixed in with the concrete as a replacement for rebar to increase its strength and durability. The correct method of using rigid foam is to run continuous 4 foot by 8 foot sheets of the foam across the concrete basement wall making the rigid foam the de facto wall. Structural foundations footings slabs walls shotcrete and precast. Use a premade kit for this type of project.

It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches. Applications for helix include but are not limited to. Todd poured concrete walls are not perfectly flat. Polystyrene foam boards commonly called foamboard are a clean lightweight convenient way to insulate bare concrete walls.

Foam board insulation is easy to use and is a great diy way to add some insulation. Or is the foam board still insulating enough to stop moisture from forming in the voids. There is almost no mess and the foam isn t itchy like fiberglass. For new construction use rigid boards to insulate slabs and the outside of foundation walls.

Is this a concern for moisture or mold in the void. Kingspan insulation r 3 common. 0 56 in x 4 ft x 8 ft. Interior insulation refers to insulation applied to the interior side of the concrete masonry as shown in figure 1.

The insulation may be rigid board extruded or expanded polystyrene or polyisocyanurate closed cell spray polyurethane foam cellular glass fibrous batt or fibrous blown in insulation note however that fibrous insulation is susceptible to moisture. Attach the tongue and groove insulation boards to the concrete wall with adhesive. Some types of thicker foam board insulation are available but they may need to be special ordered. 0 56 in x 4 ft x 8 ft 1 unfaced polystyrene foam board insulation item 511270 model 100000050497.

Follow with a 2x4 frame wall and. The insulating board also works for insulating uninsulated spaces and for shallow frost protected foundations. After that thin furring strips are installed on top of the foam to provide a firm base for the drywall screws and drywall but can you run rigid foam between the studs just as you would do with fiberglass rolls or spray foam.