People say that foam will pull away from the studs as the wood moves and dries out. Can this happen?
If the foam is not properly installed anything is possible over time. Also if the there is a contaminate on the wood foam’s adhesion can be compromised over time. However, when properly installed and on a clean and dry substarte there is no reason for the foam to pull away. The movement of building materials that are structurally sound cannot exceed the elongation and tensile strength of the foam. BASF backs this up with a warranty for Walltite. Remember foam is used as an integral part of structural panels like garage doors and has been extensively used in ready to move homes (RTM). These homes see the most severe flexing of the walls and ceilings with foam installed in them. Sprayed polyurethane foam is after all urethane. Urethane is one of the best construction adhesives known.
