Basement walls should be insulated with non water sensitive insulation that prevents interior air from contacting cold basement surfaces the concrete structural elements and the rim joist framing.
Foil faced insulation for basement walls.
Best methods for insulating basement walls.
Attach the tongue and groove insulation boards to the concrete wall with adhesive.
When to use paper faced.
Allowing interior air that is usually full of moisture especially in the humid summer months to touch cold surfaces will cause condensation and.
Now do i do the floors next with the same r igid boards plywood on top then my studded walls filled with pink insulation or do i put my studded walls after my rigid foam on the walls and then the floors with rigid foam.
Johns manville aptm foil faced insulation sheathing board is an excellent choice for insulating interior below grade walls.
Use a premade kit for this type of project.
Interior basement wall.
I have insulated my basement so far with closed cell rgid boards 1 5.
Polyiso provides one of the highest r values per inch of any rigid insulation r 6 at 1 inch.
Spray foam is also an option but usually a lot more expensive than foam boards.
Understanding when and how to use faced or unfaced insulation in walls is critical.
And that s what s going on when you attempt to hang faced fiberglass.
I ve written several articles on insulating basement walls and evolved some of my methods over time.
Basements are a challenge because of high moisture levels and cooler temperatures.
This is an even more dense and more expensive foam board insulation.
Ap foil faced insulation is lightweight and easy to install.
Basements provide for a very challenging insulation problem.
It is important not to mix them nor use the wrong faced insulation product for each task.
Mostly paper faced insulation is the best choice for neophytes in insulation installations.
You may be allowed to leave foil faced insulation uncovered check with your local building department.
Follow with a 2x4 frame wall and insulate it with batt insulation.
I have a concern about insulating my basement.
A well insulated home keeps you toasty in the winter and cool in the summer but it should do more than that too because it is a big part of creating the vapor barrier that protects your drywall.
If you are planning to finish the basement however insulation faced with foil facing is not a good choice as it can trap moisture.
For a basement remodeling project consider insulating basement walls with foam board.
Just buy un faced batts install them to grade 1 and build your air and moisture control systems in another layer big separate discussion.
One common use of extruded polystyrene foam board is for foundation insulation panels.
The damn facing obscures your work slowing down the installation and resulting in a poor insulation grade.