Interior Insulation for Foundation/Basement Walls
Last week I talked about how to insulate exterior foundation walls to improve the energy efficiency of the Plasti-Fab Home. The next step in insulating the Plasti-Fab Solutions Home is to insulate the interior basement walls. Below you can read instructions to get you started on insulating your basement using ***DuroFoam insulation. Remember, you can also use *PlastiSpan and **PlastiSpan HD in this situation as well.
When insulating a basement wall, make sure the wall surfaces are clean, dry and free of foreign materials and sharp projections. Start from a corner, and attach DuroFoam insulation to the basement wall using PL300. This is a foam safe adhesive. There are other foam safe adhesives you can use, BUT make sure they say “foam safe.” Measure and cut the DuroFoam to fit around windows. When cutting DuroFoam insulation use a utility knife or fine tooth hand saw like a drywall saw to fit openings such as windows.
You don’t need to wear gloves or a mask when cutting rigid insulation like you would with conventional fibreglass insulation. To create a vapour barrier, the DuroFoam insulation should be tightly butted together. Joints should be no wider than 1 mm. You can ensure this by applying adhesive between the boards (or tape the seams using any polypropylene tape with acrylic adhesive, also known as house wrap tape.)
Now to frame the wall, construct a separate wood framed wall and install it in front of the DuroFoam insulation to support the ½” drywall. The vertical framing should be at least 2”x2” and separated at either 16” or 24” on center. To attach the framed wall, fasten it to the upper floor joists and basement floor leaving a small gap between the PlastiSpan insulation and the framed wall. Electrical can be placed within the framed wall by running wiring in the small gap behind the framing. Shallow electrical boxes are the best fit in this application.
You can attach your drywall to your framed wall when this is complete. Following these simple steps for insulating your basement walls will help increase your energy savings and decrease your heating costs.
Next week: Building the Foundation using Insulated Concrete Forms