Question: How does Polyurethane Foam actually work?
Answer: Urethanes are plastics that have gas-filled bubbles that make them light weight and a good insulating material.
Question: What is the difference between open-cell and closed-cell polyurethane foams?
Answer: These two types of polyurethane foams have different R-values, permeability, strength, and costs and therefore different areas of use.
Question: Do urethanes "outgas" and are they toxic?
Answer: Urethanes are non-toxic and only require protection for our operators during installations, but the finished product is completely safe and has no formaldehydes.
Question: Are urethanes good for sound insulation?
Answer: Open-cell urethanes are better than closed-cell foams for reducing air-borne sound. Both are good at sealing holes that can let sound through wall or ceiling penetrations. Structure-borne sound CANNOT be controlled with low-density infill materials such as foam.
Question: What sort of paint should I use for covering polyurethane foam?
Answer: Typically, spray-applied polyurethane foam is covered by interior or exterior wall coverings or ceiling or roofing details. That said, on occasion it is left exposed and the concern really is only that of ultra-violet light that will degrade the exposed foam over time. In exterior applications, a paint will not suffice, rather a protective coating should be used.
Question: What about mold?
Answer: Mold requires three things to grow: moisture, warm temperatures and a food source. Polyurethane Foam has no nutritional value and is not considered a food source for mold. The use of polyurethane as insulation eliminates condensing surfaces and reduces the potential to accumulate moisture. It also eliminates air movement within the wall cavity. Other insulations are less successful at controlling air infiltration and providing adequate insulation to eliminate condensing surfaces, thus increasing the possibility of an environment susceptible to mold.