2 Inch Layer Foam Roof

Slate roofs national slate association 1926.

2 inch layer foam roof. Foam is especially good at the following. Versatile and lightweight xps is a suitable for insulating walls and ceilings but it has. As my article states you need a minimum of about 1 5 inch of eps 1 inch of xps or 1 inch of polyiso. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches.

Slate roofs national slate association 1926. A spray foam roof is always coated usually w silicone. Ultimately once cleaned and prepped and verified that the roof is dry a gravel built up roof is a very ideal surface to apply foam to. Some types of thicker foam board insulation are available but they may need to be special ordered.

The roofing installation team will then apply a durable outer layer to protect the foam from the elements. Installed on the roof exterior foam makes the living space below more comfortable and reduces the likelihood of ice dams. R 3 2 polyisocyanurate rigid foam insulation board. Only xps foam to be greenguard gold certified and the first xps foam certified by scientific certification systems scs to contain a minimum of 20 recycled content.

The illustration shows two layers of osb or plywood roof sheathing. Spray polyurethane foam closed cell per inch of thickness. A lower layer conventionally nailed to the rafters and an upper layer installed as a nailing surface for the roofing material on top of the rigid foam. If you want to install rigid foam above your roof sheathing in climate zone 3 then 1 2 inch of rigid foam board is not ideal this rigid foam layer needs a minimum r value of r 5 and that s impossible with 1 2 inch of foam.

A 2 inch thick sheet of this rigid foam board insulation provides thermal resistance or r value of r 10. Spray foam roofing usually cost between 4 7 per sq. Slate roofing 1 2 inch slates. Foam board insulation is easy to use and is a great diy way to add some insulation.

In the summers here in phoenix that means that foam does a good job insulating your home and preventing heat from getting into the living spaces of your home. To boost the r value of the envelope they added 4 inches of polyisocyanurate foam in two 2 inch layers to the walls and roof. The existing t1 11 siding was structurally sound so it was left in place and covered with housewrap and foam. Standing seam metal 0 032.