Radiant barrier foil - Page 2

workaholic · 01-14-14, 11:39 AM

The advantage of the more expensive product would be in the toughness. Trying to stretch and staple the thin, food grade foil on the underside of rafters without tearing would be enough to try the patience of most people.

iamgeo · 01-14-14, 05:56 PM

I would put it on the underside of the roof decking just like the techshield..

Exeric · 01-14-14, 06:24 PM

Quote:

Originally Posted by iamgeo

I would put it on the underside of the roof decking just like the techshield..

That wouldn't work. You need an air space between the foil and roof surface or otherwise heat conduction will replace radiation reflection. They are two different heat transfer mechanisms and foil only works with radiation reflection.

Exeric · 01-14-14, 06:35 PM

That's assuming you are trying to keep heat out, of course. If you are trying to keep heat in it would work, although I don't know why you would use this method over standard ceiling insulation as insulation is much better for that application.

01-14-14, 11:39 AM	#11
workaholic Lurking Renovator Join Date: Jan 2011 Location: evansville, indiana Posts: 18 Thanks: 1 Thanked 1 Time in 1 Post	The advantage of the more expensive product would be in the toughness. Trying to stretch and staple the thin, food grade foil on the underside of rafters without tearing would be enough to try the patience of most people. __________________ If there are two ways to do a job always choose the hardest; it'll take twice as long but you will learn twice as much.

01-14-14, 05:56 PM	#12
iamgeo Apprentice EcoRenovator Join Date: Aug 2010 Location: Lakehills, Tx Posts: 168 Thanks: 4 Thanked 10 Times in 9 Posts	I would put it on the underside of the roof decking just like the techshield..

01-14-14, 06:35 PM	#14
Exeric Apprentice EcoRenovator Join Date: Aug 2012 Location: California Posts: 274 Thanks: 19 Thanked 37 Times in 28 Posts	That's assuming you are trying to keep heat out, of course. If you are trying to keep heat in it would work, although I don't know why you would use this method over standard ceiling insulation as insulation is much better for that application.