Flash foam and Roxul?
geol2
| Posted in Energy Efficiency and Durability on
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?
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Replies
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.