Your choice really comes down to blanket insulation aka fiberglass or xps.
Rigid foam insulation on basement concrete walls.
The concrete should be dry and free from cracks before installing foam insulation boards.
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.
I also used rigid foam board on my basement walls before putting in studs insulation and sheetrock.
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.
Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same.
The place to control vapor migration is on the exterior of the basement wall in the form of waterproofing or damproofing.
Let s take a look.
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.
Lay a panel of polystyrene.
Usually made of fiberglass and it typically has some type of facing attached.
Styrofoam brand insulation is a rigid insulation that can be placed directly on walls framing and drywall.
Allows spacing for electrical wiring and other utilities.
This allows for some drying to take place as foam board is somewhat permeable.
Paper foil or vinyl.
Is rigid foam insulation the right insulation for your basement.
This is very common mainly because it is very cost effective.
When insulating interior basement walls in a finished basement use our styrofoam brand insulation.
Most homes use fiberglass but rigid foam insulation although more costly offers a few extra features.