Is A Radiant Barrier Necessary With Metal Roof

Metal roof and radiant barrier questions paging rox the wife and i have been researching some energy saving ideas.

Is a radiant barrier necessary with metal roof.

Our main house has a barrier and it is a great help in cooling. Radiant barriers are utilized to reduce summer heat gain in attics and help to improve the efficiency of green building envelopes. Radiant is designed to control energy radiated over space not a conductive barrier. When the sun heats a roof it s primarily the sun s radiant energy that makes the roof hot.

Do we need the radiant barrier if it is a metal roof. In these attic space applications there is an air space below the radiant barrier. The radiant barrier should be installed in a manner to minimize dust accumulation on the reflective surface. A radiant barrier can lower heat transfer from attics to the building below keep the attic space cooler and lower cooling costs by up to 17 in warmer climates.

It s a permanent solution that will help lower your energy bills. Installing the radiant barrier in direct contact with the roof only serves the purpose of protecting the roof from radiant heat from the inside of the home. A radiant barrier can be effective with an asphalt shingle roof only when installed inside the attic either to the underside of the roof decking or to the underside of the roof rafters. Thank you for your help on this and all you have given us over the years.

The problem with using. It works by reflecting radiant heat away from the surface. Unlike fiberglass insulation radiant barrier foil insulation blocks radiant heat instead of absorbing it. Obviously not its intended purpose here.

Much of this heat travels by conduction through the roofing materials to the attic side of the roof. We ll add a vapor barrier so the moist air does not flow up through the insulation and condense on the roof. We take a look at how radiant barriers work the different types of radiant barriers and some of the. Our house is relatively new approaching 10 years old.

We were thinking about replacing the current roof composite. For a shingled roof there isn t really a way to add a radiant barrier unless you were re decking or building a new roof on top of the old one the new roof being metal or tile with the required air space minimum the foil needs. But a preinstalled membrane may be even more effective at removing condensation.