Oct 29, 2009 · Benefits of closed-cell spray foam by Neal Ganser Replacing long-obsolete insulation materials with closed-cell or open-cell spray polyurethane foam is a big step in the right direction for …

Oct 28, 2024 · You should only be considering closed cell spray foam for a roof application like this, especially since it appears to be an unvented assembly. Open cell has been known to hold moisture …

Jan 22, 2013 · Flash and batt insulation is one example of a new technique being implemented by insulation contractors. Flash and batt is a hybrid insulation approach combining fiberglass insulation …

Feb 17, 2010 · Spray-foam insulation has become a weapon of choice for many builders and homeowners trying to build tight, energy efficient houses. And with its long list of attributes, that's no …

Aug 17, 2022 · Accounting for the thermal bridging of the rafters, the R-value of your roof with 5" of closed-cell spray foam is R-24.4, while the R-value of 2" foam + 3.5" batt is R-24.3. The reason that …

May 10, 2020 · This is especially true for closed cell spray foam, but also applies to open cell spray foam to a lesser extent. I would recommend mineral wool over spray foam.

Jul 10, 2019 · The amount of closed cell spray foam or rigid insulation is somewhere between 20% to 50% of the R value of the overall cavity insulation depending on your climate zone.

Oct 18, 2012 · I was surprised to hear that closed cell spray foam if installed in basement has to either have (i) special paint coating to slow down the spread of fire or (ii) sheet rock over it. Is this a true? Is …

Installing Closed-Cell Spray Foam Between Studs is a Waste Open-cell spray foam has an R-value of about R-3.7 per inch, while closed-cell spray foam has an R-value that may be as high as R-6.5 per …

Mar 17, 2017 · For higher R-value and to minimize thermal bridging, open-cell spray foam between studs is better than closed-cell spray foam.