Insulating Low Pitch Attic

In older buildings the usual method is to install fiberglass batts or cellulose on top of the leaky ceiling with a gap of a few inches or sometimes a few feet between the top of the insulation and the roof sheathing.

Insulating low pitch attic.

But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates. Eric dymond lives in a 1920s baltimore row house that needs a new roof. It is made from cellular plastic or fibrous materials and pressed into boards. You want to keep condensation from forming anywhere in your attic.

Rigid board insulation is the most common type of insulation used in low slope commercial roofing. Because the simplest and cheapest way to insulate an attic is to add material to the floor. To create a warm pitched roof insulation such as kingspan kooltherm k7 pitched roof board should be fitted between and over the rafters. Although some builders insulate a low slope roof with the same techniques used for a house with a big attic they should be using a different approach.

There are lots of ways to insulate a low slope roof and most of them are wrong. He plans on replacing the low slope built up roof with an epdm membrane and the question is how to insulate it correctly. Gaps in the framing need to be sealed any holes from electrical wiring must be filled and so on. As this requires fitting insulation above the rafters the roof covering will have to be removed in order to fit the insulation.

Stage 2 of insulating a low slope roof. Plan to pull up the flooring and layer new insulation on top of the old. Insulfoam sp is specifically designed for low sloped roof applications that employ mechanically fastened or ballasted tpo pvc and epdm as well as low sloped built up modified bitumen and fully adhered single ply roofs that incorporate cover boards or slip sheets. If the roof is vented the ceiling must be air sealed to prevent moisture laden air from reaching the attic.