Insulation vs. air flow extra expense
Hi, I’m going to have a new house built and am confused on where to spend additional money in regards to insulation and air flow.
I have talked with many builders and most offer a “standard” solution involving fiberglass batts in walls for insulation and no air control layer (other than drywall or caulking holes that they find from blower door testing).
If I am interested in anything better it will cost me more money.
I understand that “batt” insulation can be problematic in regards to having it installed correctly.
This would lend me to believe that I should spend additional money on an insulation product that is not in a batt form, a “spray” product.
But, one can argue that no matter what the product is (batt or spray); if it is installed incorrectly it will be a problem.
One can also argue that it is not the type of insulation that is being used that is of importance, but the ability to control air flow in an assembly.
Meaning that if proper controls are put in place to control air flow, it does not matter as much what insulation material is used or if it is installed properly as long as it meets the required R values of the code.
Ideally one would spend additional money for better installed insulation and on proper air flow controls.
But, if additional money is not available for both, what would be best to spend the money on? Better installed insulation like a spray product or better air flow controls?
If better air controls what are some examples? Like a liquid based coating on the outside of the house?
Posted Aug 6, 2014 3:30 PM ET
Edited Aug 7, 2014 3:37 AM ET
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