Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same.
Rigid foam insulation on basement concrete walls.
Choose rigid insulation wisely and consider the effect its characteristics will have on the performance of the your project overall product cost and the best way to get the bang for your buck.
When insulating interior basement walls in a finished basement use our styrofoam brand insulation.
After that thin furring strips are installed on top of the foam to provide a firm base for the drywall screws and drywall.
Lay a panel of polystyrene.
If necessary address moisture problems and seal cracks before you begin.
Usually made of fiberglass and it typically has some type of facing attached.
Is rigid foam insulation the right insulation for your basement.
The place to control vapor migration is on the exterior of the basement wall in the form of waterproofing or damproofing.
The concrete should be dry and free from cracks before installing foam insulation boards.
But before i glued the foam board to the walls i painted them with some of that white drylok paint specially designed to seal against moisture leaks.
Allows spacing for electrical wiring and other utilities.
I also used rigid foam board on my basement walls before putting in studs insulation and sheetrock.
On the interior the best insulation to place against the concrete or block is rigid foam without any facing such as foil or plastic sheeting.
Creates a finished appearance.
Let s take a look.
This allows for some drying to take place as foam board is somewhat permeable.
Your choice really comes down to blanket insulation aka fiberglass or xps.
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.
Paper foil or vinyl.