R Value For Concrete Basement Walls Ontario

Ontario building code 2017 solutions for basement walls slab insulation requirements david kelly sr.

R value for concrete basement walls ontario.

Top of foundation tie in with siding. Foam plastic insulation on the interior of the building envelope must adhere to the requirements of protection of foamed plastics as per 9 10 17 10 of the national building code of canada. The r value of an uninsulated 8 inch thick basement wall built using normal weight concrete is 1 35 based on data from the 1993 american society of heating refrigeration and air conditioning engineers handbook. Space your studs either 16 or 24 apart.

Icf s have high effective r values and are mold and mildew resistant but if you re on tight budget the cost of icf is about 20 to 40 more expensive than conventional methods of framing and insulating. Build a standard wall frame using studs around your basement and place them against the concrete wall. Insulation level are specified by r value. This method works best if the basement wall is even and vertical i e.

Poured concrete or concrete block as the board material is fairly rigid. Take advantage of concrete thermal mass. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. This will allow you to cut your batts to fit comfortably between them.

Basement walls reference table 3 1 1 2 a ip zone 1 compliance packages. In such cases where r value is assigned this may decrease the r value requirement for batt insulation. The higher the r value the better the thermal performance of the insulation. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50.

Secure rigid and moisture impermeable insulation panels to the concrete using mechanically attached fastening strips and then protect the assembly by attaching 12 7 mm in gypsum drywall to the. Recommended home insulation r values. R value is a measure of insulation s ability to resist heat traveling through it.