0 Helpful?

Flash foam and Roxul?

I understand from prior posts there are concerns with the flash foam and fiberglass insulation in terms of moisture vapor.

Would the use of proper barriers and Roxul instead of fiberglass help to abate that concern?

Asked by George Levicki
Posted Aug 29, 2014 11:58 AM ET
Edited Aug 29, 2014 12:45 PM ET

Tags:

1 Answer

Select your preferred way to display the comments and click "Save settings" to activate your changes.
1.

George,
Your question is unclear. The "flash and batt" or "flash and fill" technique works, as long as (a) you use closed-cell spray foam rather than open-cell spray foam, and (b) the foam layer is thick enough to keep the interior side of the cured foam above the dew point in January.

There is no technical reason why you can't use Roxul mineral wool insulation for a flash-and-batt job, but I don't think it would be particularly cost-effective. Other insulating approaches make more sense.

Answered by Martin Holladay
Posted Aug 29, 2014 12:43 PM ET

Other Questions in Energy efficiency and durability

Cold Pantry in a Passive House via Hot Water Heat Pump Air Exhaust

In General questions | Asked by Mike AbiEzzi | Apr 25, 18

Has anyone used Airfoil electrical boxes in Ontario Canada

In Building Code Questions | Asked by user-7049195 | Apr 25, 18

Vented and unvented ceiling, Zip System, metal roofing, underlayment question

In Energy efficiency and durability | Asked by Bridget Lamberson | Jan 10, 17

Has anyone used Airfoil electrical boxes in Ontario Canada

In Building Code Questions | Asked by user-7049195 | Apr 25, 18

Recommended European Tilt Turn Options with Thinnest Site Line

In Green products and materials | Asked by J M | Apr 7, 18
Register for a free account and join the conversation


Get a free account and join the conversation!
Become a GBA PRO!