Your walls in their present state have an r rating of about 3.
Insulation for cement walls.
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.
I still have a few issues to clarify in my basement project which is a retrofit on a 1945 home.
Most homeowners require insulation with an r value between 13 and 21 in their basements where most concrete walls can be found.
According to the international energy conservation code iecc for your area mass walls ones made of thick block brick stone or adobe should be at least r 10.
For reference my basement is currently finished with concrete exterior walls then charcoal colored wrap material there seems to be an inch or two between this wrap and the exterior walls then stud framing with r12 batt insulation between the studs then a vapor barrier and finally drywall on top of the vapor barrier.
Interior insulation refers to insulation applied to the interior side of the concrete masonry as shown in figure 1.
As with attics or anywhere else in your home adding more layers of insulation to your exterior walls is key to having a higher r value and better thermal performance.
Adding 2 inch thick insofast panels will bring your walls to r 13 30 percent more than the iecc minimum.
To insulate basement walls you can use blanket insulation which you just nail or staple into the wood frame in your basement.
Or you can install drywall over the studs and then add loose fill insulation.
For an energy efficient option use sprayed foam insulation.
I will use the 1 xps installing as detailed frame with 2 4 then use 3 5in glass batts finishing with gypsum.
Foam board insulation is easy to install between wall studs and over existing blanket insulation.
Insulation is vital for concrete basement walls the basement hold the house s furnace water heaters laundry machines and essential utilities.
2 calculate how many inches of insulation you need to achieve your.
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.
Force the cement into the sunken tie rod holes using a margin trowel.
Make sure your adhesive is free of solvents which can eat away at the foam insulation.
After the cement is set apply a foam board adhesive to the rear of a polystyrene insulation panel then press the panel to the wall.
Because they are naturally located below ground level basements are mostly cool and damp.
Step by step basement insulation installation.