Delamination problems?

Hi Michelle. There shouldn't be any delamination problems based on the binders. Phenol is as strong as UF and is moisture resistant, hence it's use in exterior sheathing. I spoke with Environ Biocomposites, makers of most wheatcore in the U.S. They use an MDI resin with no formaldehyde (they recommend a polyurethane adhesive for laminates). Lynden Doors uses these cores with either PVA or cassein laminate adhesives and has found no difference in adhesion between composites. Like all composite woods, avoid moisture and NAF and NAUF products should be just as good, or better, than UF, and without the formaldehyde emissions.

As a LEED consultant for Woodworkers, I have heard from a couple of my clients that MEDEX seems to be the best core for preventing the delamination problems.