How To Insulate A Flat Metal Roof

Install plywood or oriented strand board osb to act as structural roof sheathing.

How to insulate a flat metal roof.

The most popular kinds of materials utilized for a roof underlayment are mats that are made from nylon filaments and also foam insulating panels. Lay the plywood perpendicular to the roof joists and. If you have a flat garage roof and an attic above you can install the garage insulation from below using a standard ladder. There are two main types of flat roof that require different approaches to installation.

There are at least two good reasons why this approach makes more sense than installing the insulation under the roof sheathing. 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. The best material for use with metal roof insulation is in the form of foam batting. Overlap each sheet.

Cut panels on roof. The type that is right for your flat roof insulation job depends upon the state of the roof expert opinion on the best type and your budget. Lay the insulation loosely over the purlin or truss structure the horizontal framework of beams helping to support the roof. 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.

6 tips for installing metal roof insulation. The panel attachment in combination with the purlin or truss structure will secure the insulation. Lay insulation on paper liner. It should be installed on tapered 2x furring strips in order to slope the surface of the roof to drains.

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. How to insulate a metal roof hunker. This is different from the normal roll up. Gable roofs hip roofs intersecting roofs butterfly roofs mansard.

Then install r 30 fiberglass batts between the rafters. Layer building paper over the sheathing to help protect against moisture and leaks. Leave gaps between panels. Insulation material is placed on top of the roof rather than in between the ceiling and the decking.

In either case you will need to follow the general steps below to insulate your garage roof.