Before installing any insulation, it helps to research extensively to know if such a move will yield positive results or not.
Unfortunately, spray foam insulation is not always positive.
While it may boost the HVAC 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 HVAC unit in the first place. Even though temperatures are favorable, humidity can still cause discomfort as it makes people sweaty and unattractive. 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 poor quality. The contractor may have failed to seal off all leaks and vents; thus, humid air still finds its way to the attic and the house in general. Leaking ducts can also cause a problem as it creates a negative pressure in the attic. A powerful kitchen fan can also aggravate the issue. Fortunately, this is an easy one to fix. Replace the large fan with a small one, and have your HVAC 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 fix the issue. Introduce an air conditioner in the attic to create positive pressure and minimize humidity levels. Always operate from an expert level of knowledge either by consulting or conducting intense research on insulation materials.