Reflectix
I know there is alot of information here about Reflectix but I am having a hard time finding the precise information I need. Question is... When installing Reflectix, I understand you need apprx 1/2" ...
Forum Discussion
I would also want to put the reflex on the outside layer, where it can reflect the most heat, then if you have extra space, the fiberglass inside the wall. But if you don't have extra space, a second layer ofReflex will help. I think it is 4.7 R value without a air gap, and 6.0 with a air gap. But a double layer is not automatically 9.4, it is actually only about 7.0 Rvalue.
A double layer, with Reflectix on the outside, a 2" gap, and reflectix on the inside would give you about R-10. There is no need to have the 6 mil plastic, the Reflectix has all the qualities of the 6 mil plastic, and not allow wind or rain through it. Just tape it with aluminum tape and you will have a wind and water tight seal.
Reflectix tests wall panels in their lab, with a heat lamp, and measuring how quickly the heat goes through the walls in the lab. You can see some video's in their website.
Fred.
A double layer, with Reflectix on the outside, a 2" gap, and reflectix on the inside would give you about R-10. There is no need to have the 6 mil plastic, the Reflectix has all the qualities of the 6 mil plastic, and not allow wind or rain through it. Just tape it with aluminum tape and you will have a wind and water tight seal.
Reflectix tests wall panels in their lab, with a heat lamp, and measuring how quickly the heat goes through the walls in the lab. You can see some video's in their website.
Fred.
