Attach it to the purloins with double stick tape to hold it in place until you.
How to install foil roof insulation.
Reflective foil insulation installation on a roof is usually done in the ceiling attics or other spaces that separate the roof from the ceiling.
To install foil insulation roll it out parallel to the ridge and cut it with a utility knife starting at the drip edge and working your way up.
After you are done cut to adjust the length and get ready to work the next layer.
Use a stick 1 4 furring strip with nail in the end works well to help push the barrier into the tight spaces of your attic.
Starting at one end of your attic install our ultima foil breathable radiant barrier across attic floor joists plywood decking or existing insulation.
Overlap seams by about 3 inches.
Install it vertically be sure to start from a high point and roll the insulation down.
Run the unfaced strips perpendicular to the joists and butt each strip tightly together to form an airtight blanket of insulation.
How to install foil insulation on roof.
The process is more tricky than installing foil insulation during the construction of a property but can be undertaken if need be.
Attaching radiant barrier insulation to the rafters is the most effective method to employ but both methods have their advantages and disadvantages.
If there is already insulation between the joists increase the r value by installing unfaced roll insulation right on top.
Remember to apply a decent amount of tension when stapling and to do it at 50 to 100 mm intervals.
The first is stapling foil to the bottom of the roof rafters the second is laying it out over the existing attic ceiling insulation.
When installing foil insulation you must use a quality stapler.