Roof Radiant Barrier With Foam Insulation

Roofs with radiant barrier have the potential to lower the temp at night because the radiant barrier prevented the heat loss that would typically occur from the traditional mass insulation on the attic floor rising to heat the roof.

Roof radiant barrier with foam insulation.

A radiant barrier is designed to increase the effectiveness of your thermal envelope. To be effective the reflective surface must face an air space. It is meant to supplement insulation not replace it. Radiant barriers and reflective insulation systems work by reducing radiant heat gain.

Radiant barrier under metal and tile roofs. Radiant barrier roof sheathing helps to improve comfort in the building interior during the warm summer months and reduces energy costs. This means radiant barrier can increase the life of the roof shingles. Dust accumulation on the reflective surface will reduce its reflective capability.

I typically spray enough foam 5 lb open cell to achieve r 38 in our roofs. Builders dealers diy framers. The radiant barrier acts as your first line of defense against radiant heat and the foam closed attic acts as the second line of defense against conductive heat flow. The question arises with the use of spray foam.

By reducing the amount of radiant heat reaching the insulation in your attic the insulation remains cooler and is able to keep your home more comfortable. I am exploring the use of lp tech shield or foil faced radiant barrier in an open web truss roof. Here is some good information on how you can get radiant barrier to the outside of a foam closed attic. Because heat always moves from hot areas to cold areas radiant barrier sheathing also prevents heat transfer from the warm interior during the cooler winter months.

When installing attic insulation a case can be made for both radiant barrier sheathing with typical types of insulation as well as spray foam insulation. The radiant barrier should be installed in a manner to minimize dust accumulation on the reflective surface. May 16 2013 posted in. Radiant barrier is a highly reflective material typically made of aluminum which blocks the transfer of radiant heat by reflecting it away from its surface offering a permanent way to reduce your monthly utility costs.

Radiant barrier foil insulation systems block radiant heat energy instead of absorbing it like fiberglass insulation. All manufacturers of radiant barrier sheathing say not to spray against their product it will render it useless. The list of uses includes crawl space radiant floor attic and walls. Our product is easy to handle and install.

Radiant barrier sheathing is inexpensive and reflects thermal radiation to keep attic spaces cool.