Efficiency per inch for 2-lb. closed-cell spray foam
With most things with layers, each layer provides a different level of efficiency which you can then take this and apply cost to find your best number of layers to go. Does anyone know how many inches of 2# closed cell spray foam is the optimum? I talked to one contractor that said that the first 2" of the foam provide 90% efficiency. Does this sound right? Or should you be looking at going 4" or more? How does one determine how much is enough and the rest is overkill?
Posted Tue, 05/13/2014 - 13:41
Edited Tue, 05/13/2014 - 14:19
Other Questions in Energy efficiency and durability