Roof Plywood Delamination

This winter i went up.

Roof plywood delamination.

Blows are a. Plywood is created by gluing layers of thin veneers together and delamination occurs when these layers separate. Delaminations commonly affect single ply and fully adhered roofs. The more layers the better.

The contractor thought it might have been due to excess moisture in the attic. The causes of plywood delamination plywood anatomy. Particularly on the roof. Good glue coverage is essential to prevent delamination of layers.

I had my roof sheathing replaced a year ago. One of the implications of high moisture levels from either condensation or leakage is delamination of plywood sheathing. This is sometimes accompanied by buckling. Even the best manufacturing equipment.

Although delamination can be caused by several factors separation often occurs as a result of improper manufacturing processes. Panel type roof sheathing may lift off the rafters in a regular pattern. If the environment is humid moisture can get trapped between the membrane and insulation. Roof decking plywood delamination if you have a home twenty five years or older you may want to consider the condition of the plywood.

When the membrane and insulation separate. Plywood is a sandwich of thin veneers glued together with heat. High moisture levels break down the glue in the plywood and allow the plies to delaminate.