Fitting Roof Insulation Board

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.

Fitting roof insulation board.

Fitting the insulated plasterboard. Batts between rafters in would require adding ventilation between the insulation roof deck. The bottom of the insulated plasterboard should meet the floor level of the roof space. Use a chalk box to snap chalk lines on the roof deck.

Install it anywhere from the roof to the foundation. Butt the ends of the boards up together. One of the more popular methods of placing metal roofing on a home is to lay down purlins across the existing shingles. They keep your home at a comfortable temperature without the need to crank your heat.

Rigid foam insulation also known as insulating boards provide high r values. After cutting the plasterboard to width so that it fits between horizontal centres of rafters screw the insulated plasterboard to the rafters. Some types of thicker foam board insulation are available but they may need to be special ordered. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches.

This technique is the same for all rigid insulation such as kingsp. Make sure that the insulation you are using is the same thickness so that the metal roof will fit better. Foam board insulation is easy to use and is a great diy way to add some insulation. Hack n stack sealed foam board between the rafters would be better since it s at least an air impermeable insulation but even that would require a vent gap below the roof deck to meet code and you d still be under r38 on that 2x6 rafters unless you fattened it out per holladay s recommendation.

Here is how we cut and fit our pir insulation to insulate the walls and roof of the house. You can even place it under the foundation slab. Stagger the horizontal joins. 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. Stagger the joints to. Composed of a closed cell polyisocyanurate foam core bonded in the foaming process to 1 2 thick duraboard an expanded perlite mineral aggregate board on one side and a fiber glass reinforced facer on the other. Rigid roof insulation board.