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TIPS
- Make sure the framed wall stands on the moisture barrier.
- Moisture barrier can be fastened to the foundation wall or, if the wall is nailed together laying down on the floor, stapled to the back of the wall studs.
- The air-vapour barrier is ALWAYS installed on the "heated side"
- If the poured concrete foundation wall is not straight snap the chalkline 4 1/2" out from the wall.
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| Basement Wall Insulation - From Interior Side |
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Batt insulation. Moisture barrier. Air-vapour barrier. Wood or steel studs.
THERMAL RESISTANCE OF INSULATION.
The thermal resistance (or RSI) value is a measure of a material's ability to resists heat flow. The higher the R value, the better the material insulates. |
| WARNING. All styrofoam (or rigid board) insulation is a fire hazard if not properly protected by non-combustible materials such as drywall. |
The basement should not be insulated from the inside if there is a moisture problem, unless corective measures are taken to eliminate the moisture problem. For more information on how to deal with a damp or wet basement click here. |
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A proper and effective way of insulating the basement wall is to install a wood frame or steel stud wall with batt insulation as illustrated.
1- The moisture barrier extends up to the exterior grade level. Leave extra at the bottom to protect the wall from possible water damage (see also TIPS).
2- The batt insulation should fit snugly between the wall studs and joist header area.
3- An air-vapour barrier is installed on the warm, or room, side of the insulation. If the walls are fairly straight and plumb, rigid board insulation can be used.
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