Roof Radiant Barrier With Foam Insulation

It is meant to supplement insulation not replace it.

Roof radiant barrier with foam insulation.

The list of uses includes crawl space radiant floor attic and walls. 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. Here is some good information on how you can get radiant barrier to the outside of a foam closed attic. A radiant barrier is designed to increase the effectiveness of your thermal envelope.

The question arises with the use of spray foam. Dust accumulation on the reflective surface will reduce its reflective capability. Radiant barriers and reflective insulation systems work by reducing radiant heat gain. All manufacturers of radiant barrier sheathing say not to spray against their product it will render it useless.

May 16 2013 posted in. I am exploring the use of lp tech shield or foil faced radiant barrier in an open web truss roof. Radiant barrier sheathing is inexpensive and reflects thermal radiation to keep attic spaces cool. 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.

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. 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. I typically spray enough foam 5 lb open cell to achieve r 38 in our roofs. This means radiant barrier can increase the life of the roof shingles.

Our product is easy to handle and install. 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. To be effective the reflective surface must face an air space. Builders dealers diy framers.

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. A number of factors should be taken into consideration when choosing between these two especially the climate zone that you re building in. Radiant barrier roof sheathing helps to improve comfort in the building interior during the warm summer months and reduces energy costs. Radiant barrier under metal and tile roofs.

The rigid foam insulation addresses the conduction and convection and adding a radiant barrier addresses radiation you ll find that adding a radiant barrier is best practice but only when there is an air space.