What's the R-value? would this work on cinder block walls to keep more heat in? I'm thinking of buying this product lining my block walls in it with the white/ foil backing so i dont have to paint an also is this good for ceilings? I'm making a drop ceiling outa 2x4s using r13 then stable this on ceiling
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Foil bubble insulation
- Thread starter Blkctsv05
- Start date
Tim The Tool Man
Well-known member
R-value would be listed right on the product and from my experience it is not very high at all. It is better than nothing but there are many other more efficient and cheaper options out there. Although if you want it for the look then go for it...
theoldwizard1
Well-known member
Some of the double foil faced insulations are claiming claiming very high R ratings, but you have to read the fine print.
To achieve their high ratings they are installing their double foil faced bubble/¼" fiberglass in the center of a 2x4 cavity securely stapling it on all sides and then covering both sides with ¾" OSB/plywood. (When was the last time you saw a home built with ¾" roof decking ? I had to pay extra to get ½ decking ! And ¾" on the inside ?)
It is the dead air above between the sheathing and their insulation that is actually providing the insulation. The only thing better than dead air is no air - a vacuum (Google Dewar's flask).
To achieve their high ratings they are installing their double foil faced bubble/¼" fiberglass in the center of a 2x4 cavity securely stapling it on all sides and then covering both sides with ¾" OSB/plywood. (When was the last time you saw a home built with ¾" roof decking ? I had to pay extra to get ½ decking ! And ¾" on the inside ?)
It is the dead air above between the sheathing and their insulation that is actually providing the insulation. The only thing better than dead air is no air - a vacuum (Google Dewar's flask).
anthony666
Well-known member
the LISTED r value of that stuff depends on the application .. it's NOT insulation though, it's a radiant barrier and in order for it to have any chance to work at all it needs an air gap .. i use it in in-joist radiant floor applications to make the heat go up into the floor rather than down into whatever space is below
jack stand
Well-known member
Go outside, face into the wind and piss. Same thing! Nail up some foam.