Why Flash and Batt Makes Sense
Closed-cell spray foam and fiberglass batts can be used together to maximize performance and minimize cost
Closed-cell spray-polyurethane foam may be the best-performing insulation available today. It seals against air infiltration, it boasts more R-valueMeasure of resistance to heat flow; the higher the R-value, the lower the heat loss. The inverse of U-factor. per inch than other forms of insulation, and it blocks the passage of water vapor. It’s also the most expensive option, and it requires dedicated equipment for large-scale installations.
[To read more of Michael Maines's article from the February/March 2011 issue of Fine Hombuilding, click the link below.]