Metal Roof Over Rigid Insulation

The bottom layer of a single ply membrane roofing system is the roof deck or substrate.

Metal roof over rigid insulation.

Rigid board can easily be over torqued and mess with panel alignment. Adding the metal roof insulation can be done easily when you renovate your house. The rigid insulation over roof would have controlled the temperature of the condensing surface the underside of the roof deck so that i would not have had to use the spray foam except at the perimeter to provide the air seal to the tops of the walls. Use rigid foam insulation to cover wider spans of roof sheathing between joists.

The roof deck can be plywood metal concrete or wood planks. Cut each sheet to the desired size using a utility knife then fasten it in place using staples or adhesive. Or you may also consider metal roofing over rigid insulation details even though it might be a bit pricier. I like rock all because of its higher r value fire and moisture resistance and good cost per r value 6.

You will need to hire some well trained roofing insulation experts to make a more energy efficient home. The first step with roof installation is to prepare the roof deck by getting rid of all dirt dust and contaminants. According to the manufacturer s instructions install the metal roofing panels over the insulation. Place the sheets close together but don t let them overlap.

Payback is not the way to do it at least not in my. Install roofing over a wind barrier like spun olefin. Rigid insulation is one of the best tools to reduce your energy costs. Use duct tape to seal the seams and further protect against moisture air leaks.

They keep your home at a comfortable temperature without the need to crank your heat. Make a grid frame work of 2 dimensional to make space for the insulation. You can even place it under the foundation slab. This could be metal or roof sheathing and shingles.

Vincent i live in a 100 year old adobe in northern utah and i installed a system of exactly what you describe except i put the roofing felt over the poly iso insulation and the metal roof is a modified standing seam from metal sales that has small corrugations that let a small amount of air to flow under the panel. Avoids nails or screws which could penetrate the metal roof and cause leaks. Fill this space completely with insulation. Install it anywhere from the roof to the foundation.

Rigid foam insulation also known as insulating boards provide high r values. Jd i don t recall todd saying that he didn t like insulation just that metal directly over insulation i e. Rigid foam insulation installation prepare roof deck.