The recommended r value for attic insulation in ontario is between.
Minimum attic insulation alberta.
The average recommended level is 17 inches of r60.
After installing insulation in the existing cavities nail or screw strapping 2 x 2 or 2 x 3 on edge perpendicular to the rafters and studs.
Energy efficiency alberta s rebates are available for insulation added to a home s attic main walls exposed floors in basement and pony walls.
Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1.
R 38 shall be deemed to satisfy the requirement for r 49 wherever the full height of uncompressed r 38 insulation extends over the wall top plate at the eaves.
For diy attic insulation you ve got two choices.
The following table provides minimum estimates of how much money you can expect to get back in rebates your.
Both can be added to uninsulated attics or layered over existing material.
Don t forget that electricity is the most expensive fuel in alberta and the cheapest in quebec.
You will probably want to check the local codes before you build as the details of the national energy code or some modification of this may be the law in your municipality with specific insulation requirements for each part of your house.
Generally speaking a higher r value means better insulating properties.
In zone 7 the average minimum requirement for attic insulation is 14 inches of r49 fill.
If your attic is not too cramped consider adding strapping onto the rafter bottoms and wall studs to allow for more insulation up to the recommended minimum level for attic insulation if possible.
The effectiveness of insulation is measured in relation to its thermal resistance which is a way of saying how much conductive heat flow the product stops from going through it.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
However there is an exception.
Loose fill or batt the common term for blanket insulation.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
The 2015 irc requires r 49 insulation for ceilings with attic spaces.
Insulation level are specified by r value.
R value is a measure of insulation s ability to resist heat traveling through it.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
Once you ve decided which type is best for you examine the material options and prices to home in on the right product.
Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter.
The higher the r value the better the thermal performance of the insulation.
Watch attic insulation energy efficiency alberta video on youtube.
