Roof Plywood Delamination

Good glue coverage is essential to prevent delamination of layers.

Roof plywood delamination.

I had my roof sheathing replaced a year ago. Between the years of around 1964 to 1975 homes being built saw the installation of what was first generation fire retardant plywood. Roof decking plywood delamination if you have a home twenty five years or older you may want to consider the condition of the plywood. Delaminations commonly affect single ply and fully adhered roofs.

The more layers the better. If the environment is humid moisture can get trapped between the membrane and insulation. High moisture levels break down the glue in the plywood and allow the plies to delaminate. It was plywood and had delaminated.

The causes of plywood delamination plywood anatomy. This is sometimes accompanied by buckling. The contractor thought it might have been due to excess moisture in the attic. When the membrane and insulation separate.

Particularly on the roof. Although delamination can be caused by several factors separation often occurs as a result of improper manufacturing processes. One of the implications of high moisture levels from either condensation or leakage is delamination of plywood sheathing. This winter i went up.

Plywood is a sandwich of thin veneers glued together with heat. Even the best manufacturing equipment. Plywood is created by gluing layers of thin veneers together and delamination occurs when these layers separate.