How To Install Blanket Flat Roof Insulation

If there is already insulation between the joists increase the r value by installing unfaced roll insulation right on top.

How to install blanket flat roof insulation.

Depending on the height of your ceiling you may need to use a step ladder to place the insulation. Put the long runs in place first. Colorbond flat roof video presentation by rainshield roofing. Then use the remnants to fill in the smaller spaces.

Then install r 30 fiberglass batts between the rafters. Installing flat roof insulation can be a bit challenging. Run the unfaced strips perpendicular to the joists and butt each strip tightly together to form an airtight blanket of insulation. However with the proper tools any do it yourselfer can complete the job.

Use a straight edge and use an utility knife to cut the material. Place the strips and then fill the little spaces that will surely remain. The insulation material usually comes in rolls and you will need to cut strips to fit the spaces in the ceiling. Place the insulation between the joists with a bit of pressure.

Blowing insulation into a ceiling below a flat roof will require quite a few tools and materials. 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. It should be installed on tapered 2x furring strips in order to slope the surface of the roof to drains. Blanket insulation can cause roof leaks under flat metal roofs most new metal roofs now have a layer of blanket insulation installer underneath.

This shows you a guide to installing an insulation blanket watch this and other related films here.