Vincent i live in a 100 year old adobe in northern utah and i installed a system of exactly what you describe except i put the roofing felt over the poly iso insulation and the metal roof is a modified standing seam from metal sales that has small corrugations that let a small amount of air to flow under the panel.
How to install insulation under metal roofing.
Attach it to the purloins with double stick tape to hold it in place until you.
This reduces the need to go up and down the ladder for tools pieces of insulation and making measurements.
Be sure the larger edge is laid so that the small edge of the next panel will overlap it.
Layer building paper over the sheathing to help protect against moisture and leaks.
Choose among the insulation options based on your needs budget and preference.
Overlap each sheet.
Before you install metal roofing repair any damage to the wood under the shingles.
Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof.
Before laying the roofing panels begin to install plywood to firmly support the.
Insulation types such as foam batting.
Install the roofing screws vertically along each rib in the panel.
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.
Cut panels on roof.
Install by using staples.
It can lie down perfectly under the metal roofing without having to deal with the hassle.
Next use 1 inch nails to secure some metal edging to the perimeter of the roof.
Then cover the entire roof with a layer of insulation and secure it with a staple gun.
Install plywood or oriented strand board osb to act as structural roof sheathing.
Unroll the foil bubble wrap insulation over the metal joists or purloins that create the frame for the roof.
How to insulate a metal roof hunker.
Overlap seams by about 3 inches.
Before doing any work with the metal roof insulation you should have it brought up onto the roof.
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Lay the plywood perpendicular to the roof joists and.
Place the first screw.
But it is important to make sure that the paper liner is installed correctly between the sheathing and the insulation to prevent mold and mildew.