How To Insulate Roof With Exposed Rafters

Place the plastic sheeting on top of the rolled insulation.

How to insulate roof with exposed rafters.

The basic approach to insulating a roof with exposed rafters involves placing insulation on the exterior side of the finish ceiling and covering the insulation with a layer of sheathing. Use either two layers of reflective foil insulation installed back to back or one layer of a double polished reflective material which is shiny on both surfaces. Following ten years of extensive testing isoboard thermal insulation has developed a proven solution to fixing its thermal insulation boards above rafters trusses or beams. How to expose rafters and still provide insulation step 1.

Isoboard thermal insulation fitted as a ceiling following the roofline allowing the opportunity to create additional space or a liveable loft conversion. Cut the boards along the marked lines by placing a. Spread foam adhesive onto the back of the first board with a. Measure the space between the roof rafters.

For rolled insulation place it between roof rafters. The bigger issue comes around when you are dealing with a roof that has exposed trusses cathedral ceilings or specialty open ceilings. The roof would then have about the same insulating value as r 11 fiberglass against downward heat flow. Then feed the rolled insulation under wires and pipe if either is present.

By zuerita june 5 2017. With a regular roof insulation isn t a problem. To insulate the underside of the ceiling between rafters you ll want to add insulation to the exterior portion of the finished ceiling. The space should be ventilated with continuous soffit and ridge vents.