Before installing any insulation, it helps to research extensively to think if such a move will yield positive results or not, and unfortunately, spray foam insulation is not regularly positive.
While it may boost the heating and air conditioning unit’s efficiency in general by reducing air transfer, thus ensuring balanced temperature levels, it may cause discomfort by fostering high humidity levels! This defeats the purpose of owning an heating and air conditioning unit in the first place! Even though the temperatures are favorable, humidity can still cause discomfort as it makes people sizzling and sweaty.
Unless you are willing to find alternative ways of getting rid of the excess humidity, installing a spray foam may not be worth it. So how does spray foam insulation trigger high humidity? First of all, humidity spikes sometimes happen after spray foam insulation in the attic because of bad quality. The company may have failed to seal off all leaks and vents, and humid air still finds its way to the attic and the house in general, then leaking ducts can also cause a problem as it creates a negative pressure in the attic. A powerful home office fan can also aggravate the issue, and fortunately, this is a simple one to fix! Replace the large fan with a small one, and have your heating and air conditioning repair expert seal off all leaks. Unfortunately, these measures may not guarantee success. If this happens, then you need to install an external dehumidifier to repair the issue. Introduce an a/c in the attic to create positive pressure and minimize humidity levels. Always operate from an expert level of expertise either by consulting or conducting intense research on insulation materials.