In the case of a cold roof structure the insulation is placed between or between and under the rafters or at ceiling joist level and the roof is ventilated by leaving a 50mm gap above the insulation which vents air to the outside.
How to insulate your roof rafters.
Cut each piece of insulation an inch or two longer than needed to assure a snug fit.
First climb into the attic and use measuring tape to determine the square footage of the space.
If your attic is going to be converted into livable space then you will need to insulate the roof rafters.
Push the insulation in place between the rafters but be careful not to compress the material.
If you re considering turning your attic into conditioned storage or living space it s worth changing tactics to insulate between the rafters and wall joists instead of the floor.
For insulation to reach its full potential for preventing warm air migration it must maintain the.
Step 3 installing the insulation.
Hire a pro to install spray foam insulation.
Step 1 measuring the space.
When they are cut ensure there is a.
Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place.
Consumers are often told by spray foam contractors to do the rafters.
If you re not do the attic floor.
Use your straightedge to compress the insulation before cutting and use a very sharp utility knife to assure a good straight cut across the fiberglass batt.
Using rigid boards as opposed to wool is a much more precise.
You can use rigid foam panels or do as tom silva does with nearly all houses these days.
Check out our how to video at the link below.
How to insulate roof rafters.
Step 2 cutting and fitting the insulation.
Your rigid boards will need to be cut to fit the gaps between the rafters.
If you re using the attic for living space then you need to insulate the rafters.
Once you have these in place measure the length of the spaces between your rafters.
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That s how you can save up to 40 on your energy bills.
Time to get the insulation finished and get this place warm.