How To Insulate A Corrugated Roof

Cut panels on roof.

How to insulate a corrugated roof.

Not the cheapest option but easiest. The spray can be basically applied on top or bottom of the metal roofing surfaces. Before doing any work with the metal roof insulation you should have it brought up onto the roof. I want to insulate my garage roof to help stop the condensation.

Polyurethane spray foam metal roof insulation. The panel attachment in combination with the purlin or truss structure will secure the insulation. Lay the plywood perpendicular to the roof joists and fasten it in place using galvanized or stainless steel roofing nails. Fix some galvanised mesh to the rafters batens.

Most of the roofing sheet companies will do you insulated sheets insulation thickness varies between 20mm and about 200. I was thinking of getting some 50mm kingspan board cutting it and pushing it between the rafters. If your replacing the roofing shets why not just order insulated sheets. Lay the insulation loosely over the purlin or truss structure the horizontal framework of beams helping to support the roof.

Move onto next section. Financially speaking this spray is a great option especially when you need to renovate your roof after the application. Compared to the fiberglass batts this insulation is much better. It is a corrugated asbestos roof with wooden joists holding it up.

Install silver foil roofing insulation over the mesh. This way you ll hopefully leave a good vent space between the insulation and the corrugated sheets the sheet metal itself will be stone cold and will attract condensation which will need to be vented to keep it and the joists dry. Pre drill the holes and use 10 by 2 in 25 4 by 5 1 cm screws with polycarbonate washers. Mesh stops the insulation from sagging.

Metal roof design vented atop additional wood sheathing weather barrier diagonal 1 x 4 wood strips. Leave gaps between panels. From bottom to top of roof system wood sheathing slats vapor barrier rigid foam insulation 3 x 1 or 2 x 2 rigid foam insulation wood sheathing self adhered membrane corrugated metal roofing. Continue across the roof until it is completely covered lapping over the previous panel by at least 2 5 inches 6 4 cm minimum.

Make all cuts to the foam panels on the roof for more accurate cuts and quicker placement. Step 2 pull the insulation so that it extends over the top plate of the wall. This reduces the need to go up and down the ladder for tools pieces of insulation and making measurements. Insulating a new metal roof step 1 install plywood or oriented strand board osb to act as structural roof sheathing.