How To Install Blanket Insulation Under A Flat Roof

Blanket insulation can cause roof leaks under flat metal roofs most new metal roofs now have a layer of blanket insulation installer underneath.

How to install blanket insulation under a flat roof.

Overlap seams by about 3 inches. Allow upper blanket a to abut the lower blanket s bulk insulation position over blanket b s exposed facing and commence rolling out. As part of insulating your flat roof be sure to contain and seal all bypasses. Trim and peel away the bulk insulation from blanket b that crosses over truss rafter exposing the rfl.

Installing blanket flat roof insulation can be done by even a novice do it yourselfer. Remove bulk insulation from the lower portion of the roll width. At least 100mm of rigid board insulation must be positioned on top of the vapour control layer the vapour control layer stops any moisture within the building. To install foil insulation roll it out parallel to the ridge and cut it with a utility knife starting at the drip edge and working your way up.

What insulation to use. Blanket insulation or rigid styrofoam will be the least expensive but depending on the accessibility it may be difficult to. White metal roof with rigid insulation duration. Of the three basic types blown in insulation is the easiest to install but it requires a skilled professional.

Matt risinger 379 102 views. One of the main benefits you will receive from installing a warm flat roof is condensation will not become an issue because of the positioning of the insulation. It is a nice handy way to insulate the roof cavity and also cut down on a bit of rain noise.