How To Insulate A Flat Metal Roof

Roof types the various types of roofs found on homes sheds garages and other buildings fall into one of the following categories.

How to insulate a flat metal roof.

It should be installed on tapered 2x furring strips in order to slope the surface of the roof to drains. Lay the plywood perpendicular to the roof joists and. Gable roofs hip roofs intersecting roofs butterfly roofs mansard. Overlap each sheet.

6 tips for installing metal roof insulation. There are lots of different ways to insulate this type of roof but one of the best methods calls for the installation of rigid foam insulation above the roof sheathing. Lay insulation on paper liner. Attaching an underlayment between the roofing sheathing system and the metal roof is an essential step regarding decreasing the noise that would otherwise come from the metal roof.

There are at least two good reasons why this approach makes more sense than installing the insulation under the roof sheathing. Cut panels on roof. Layer building paper over the sheathing to help protect against moisture and leaks. Insulation material is placed on top of the roof rather than in between the ceiling and the decking.

If you have a flat garage roof and an attic above you can install the garage insulation from below using a standard ladder. Then install r 30 fiberglass batts between the rafters. However if you have a cathedral style garage roof you will need a scaffolding to get into the upper areas of the roof. The best material for use with metal roof insulation is in the form of foam batting.

This is different from the normal roll up. In either case you will need to follow the general steps below to insulate your garage roof. The panel attachment in combination with the purlin or truss structure will secure the insulation. How to insulate a metal roof hunker.

Leave gaps between panels. Lay the insulation loosely over the purlin or truss structure the horizontal framework of beams helping to support the roof. Install plywood or oriented strand board osb to act as structural roof sheathing. The most popular kinds of materials utilized for a roof underlayment are mats that are made from nylon filaments and also foam insulating panels.

Framing this out and buying 30 r fiberglass insulation will cost you about 50 more than just buying 5 inches of polyiso equivalent of 30 r.