Metal Roof Over Rigid Insulation

Place the sheets close together but don t let them overlap.

Metal roof over rigid insulation.

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. They keep your home at a comfortable temperature without the need to crank your heat. The first step with roof installation is to prepare the roof deck by getting rid of all dirt dust and contaminants. Rigid foam insulation also known as insulating boards provide high r values.

The roof deck can be plywood metal concrete or wood planks. The bottom layer of a single ply membrane roofing system is the roof deck or substrate. Fill this space completely with insulation. According to the manufacturer s instructions install the metal roofing panels over the insulation.

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. You will need to hire some well trained roofing insulation experts to make a more energy efficient home. Install roofing over a wind barrier like spun olefin. Payback is not the way to do it at least not in my.

This could be metal or roof sheathing and shingles. The energy argument is argumentative. Or you may also consider metal roofing over rigid insulation details even though it might be a bit pricier. Rigid board can easily be over torqued and mess with panel alignment.

I agree to that extent and always recommend a solid deck or some sort of strapping to prevent this. Use rigid foam insulation to cover wider spans of roof sheathing between joists. Jd i don t recall todd saying that he didn t like insulation just that metal directly over insulation i e. Install it anywhere from the roof to the foundation.

Rigid foam insulation installation prepare roof deck. Make a grid frame work of 2 dimensional to make space for the insulation. I like rock all because of its higher r value fire and moisture resistance and good cost per r value 6. Cut each sheet to the desired size using a utility knife then fasten it in place using staples or adhesive.

You can even place it under the foundation slab. Rigid insulation is one of the best tools to reduce your energy costs. Avoids nails or screws which could penetrate the metal roof and cause leaks.