Fitting Roof Insulation Board

Use a chalk box to snap chalk lines on the roof deck.

Fitting roof insulation board.

Stagger the joints to. Install it anywhere from the roof to the foundation. In this case simply lay the insulation between the purlins. Stagger the horizontal joins.

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. 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. With a warm roof the usual process is to split the insulation into two layers.

Foam board insulation is easy to use and is a great diy way to add some insulation. One of the more popular methods of placing metal roofing on a home is to lay down purlins across the existing shingles. Batts between rafters in would require adding ventilation between the insulation roof deck. Some types of thicker foam board insulation are available but they may need to be special ordered.

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. 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. Butt the ends of the boards up together.

Align the insulation boards with the chalk lines and lay them onto the deck. Rigid roof insulation board. Rigid insulation is one of the best tools to reduce your energy costs. After cutting the plasterboard to width so that it fits between horizontal centres of rafters screw the insulated plasterboard to the rafters.

It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches. It s light weight provides ease of handling. Fitting the insulated plasterboard. The bottom of the insulated plasterboard should meet the floor level of the roof space.