How To Install Insulation In Roof

Run the unfaced strips perpendicular to the joists and butt each strip tightly together to form an airtight blanket of insulation.

How to install insulation in roof. Replace the floorboards and then spray more insulation on top of it. With a warm roof the usual process is to split the insulation into two layers. Align the insulation boards with the chalk lines and lay them onto the deck. Before doing any work with the metal roof insulation you should have it brought up onto the roof.

Staples will also allow you to get a strong attachment without leaving a big hole yet easy to remove them when a repair is needed. Butt the ends of the boards up together. Cut panels on roof. Instead of adding insulation above your roof sheathing put it on the attic floor where it belongs.

If 180mm is to be installed then 100mm board might be introduced between the rafters there has to be a minimum 25mm air gap between the insulation and the underside of the tiles or slates with an 80mm board running across the rafters. Make all cuts to the foam panels on the roof for more accurate cuts and quicker placement. But putting insulation above the roof sheathing is misguided if you have a vented attic. This reduces the need to go up and down the ladder for tools pieces of insulation and making measurements.

If you have a solid floor covering the roof rafters use the claw end of a hammer to pull the floor up in several locations and blow the insulation under the boards. Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof. Place the first screw. Leave gaps between panels.

Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Use a chalk box to snap chalk lines on the roof deck. The materials used to insulate under the roof include batts of mineral or glass wool insulation held in place by battens of wood attached to and across the rafters alternatively polystyrene. Using staples will allow you to install the insulation easily and quickly.

If there is already insulation between the joists increase the r value by installing unfaced roll insulation right on top. Stagger the joints to. For rolled insulation place it between roof rafters.