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Insulating Interior Basement Walls

Renovation Solutions - Insulating Interior Basement Walls

Energy Tip

Continuous insulation applied over the interior surface of basement walls
eliminates thermal bridges and ensures the wood frame wall cavity will
remain warmer .

Follow these simple How-to steps to install your PlastiSpan insulation to have an insulated interior
basement wall.

1.Follow the building code. Be sure to follow the building code requirements applicable
in your region.

4. Frame the Wall.
Construct a wood framed wall to be installed in front of the insulated basement wall to support the 1/2" thick gypsum board. The vertical framing members should at least 2'x2' spaced at 16" or 24" on centres.

2. Start From a Corner.
The wall surfaces must be
clean, dry and free of foreign materials and sharp
projections. Starting from a corner, attach insulation
boards to the basement wall using an adhesive compatible with expanded polystyrene (EPS) insulation.

5. Install the Wall. Fasten the framed wall to the upper floor joist and basement floor leaving a small gap between the insulation and the back of the framed wall. Electrical wiring can be placed by running it in the small gap behind the framing. Use shallow electrical boxes.
Vapour Barrier.
A separate vapour barrier will be required when using PlastiSpan insulation less than 5 inches thick.

3. Measure and Cut.
LMeasure and cut insulation board with a utility knife or
fine tooth hand saw such as a keyhole type or drywall saw
to fit openings such as
windows. Insulation boards should be tightly butted together.

6. Attach Gypsum.
Attach 1/2" thick gypsum board to the face of the framed wall.