Insulation Inside Poured Concrete Walls

When insulating concrete basement walls a good idea because concrete basement walls are often cold use rigid foam board insulation if the insulation will come into direct contact with the.

Insulation inside poured concrete walls. Your only option is to cover the inside of the exterior walls with a continuous layer of insulation as though you were insulating a basement wall. For example if you have a 7 foot wall you ll need 6 foot 10 1 2 inch long studs. To ensure there s no dampness seeping through the walls conduct a simple test using plastic sheeting and duct tape. Interior insulation refers to insulation applied to the interior side of the concrete masonry as shown in figure 1.

The most important concern to address before insulating your basement is moisture. I noticed you comment this method should not be used if you have a history of water even small amounts. Basement walls made out of concrete stone concrete bloc and other masonry foundation materials have very minimal insulating properties and cause approximately 20 of heat loss in a home. Nethaniel ealy a builder in idaho who s about to pour a concrete basement foundation is trying to come up with insulation and waterproofing details that will be effective and within the budget.

I was planning on putting a 5 8 foamboard against the interior wall then a 1 inch air space followed by 2 6 framing with 6 bats of fiberglass type insulatoin. 2 cm of sprayed polyurethane foam directly on the r 4 5. To prevent interior air from reaching the cold concrete seal the perimeter of each piece of rigid foam with adhesive caulk high quality flashing tape or. 25 mm polystyrene board across the entire concrete surface r 5 or if the concrete surface is irregular in.

David caruso springfield pa. Prepping for basement insulation. Tape a small piece of plastic sheeting to a bare concrete wall with an impermeable duct tape border and wait. Rigid foam can be adhered to a poured concrete or concrete block wall with foam compatible adhesive or with special plastic fasteners such as hilti idps or rodenhouse plasti grip pmfs.

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. That is why insulating your basements walls is necessary especially when you live in areas that have very cold climate. Cut 2 by 4 lumber to the height of your concrete wall minus 1 1 2 inches for a header and footer. The current plan is to place 2 inches of extruded polystyrene xps on the outside of the foundation walls.

And there is no effective way to fill the voids in an existing concrete block wall.