radiant barrier whats th eupside (how much, home, roofing)

[soda7o]

anyone added Radiant Barrier

what is the retuls? how much cooler is the house? is it worht the spend for the savings?

[MckinneyOwnr]

It's worth it if you get the "rigid foam" type, mounted underneath the roofing. My previous home had that, and it kept the attic a good 30 degrees or more cooler than an attic with nothing.

My current home has the OSB sheathing with the foil directly attached to the plywood, there is no foam part. As such, the R factor is less than a home built with a plywood roof, and then adding the foam panels. It just doesn't work as well, but I'm sure there's a benefit vs a home with nothing.

[RadiantGUARD]

If you have adequate ventilation, a breathable (perforated) radiant barrier attached to the underside of your attic rafters can bring your overall attic temperature close to the outdoor ambient temperature, which in most cases is about 30 lower than an attic without a radiant barrier.

The reason I say "adequate ventilation" is because even if you put up a high quality radiant barrier, if you don't have good ventilation, your attic temperature will not come down as low as it can with the radiant barrier. Ventilation is so important to help carry out heated air and moisture from your attic.

Radiant barriers are fairly easy to install if you are comfortable being in your attic space and if the pitch of your roof isn't too steep. You can find product and installation instructions here (http://www.radiantguard.com) Otherwise, having a service company install radiant barrier for you isn't too costly. Just make sure you get a couple of quotes to compare before you choose a company because quotes vary widely.