May Lead To Delamination Of The Roof Sheathing

One of the implications of high moisture levels from either condensation or leakage is delamination of plywood sheathing.

May lead to delamination of the roof sheathing.

Depression between the rafters. 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. I had my roof sheathing replaced a year ago.

What might delamination of the roof sheathing lead to. This winter i went up. When the membrane and insulation separate. Delaminations commonly affect single ply and fully adhered roofs.

The contractor thought it might have been due to excess moisture in the attic. The soffits didn t appear to be congested with insulation however the ridge vent had a filter in place. It was plywood and had delaminated. In the future looking for a date stamp on the affected sheet or other sheets in the same general area may help an apa rep.

3 8 plywood roof sheathing. First deal with the cause which is inadequate attic ventilation. It may be mfgr. Particularly on the roof.

To improve it make sure your home has continuous ridge and soffit ventilation. That being said what the home inspector saw may or may not be mold. If this is the case the solution is twofold. Between the years of around 1964 to 1975 homes being built saw the installation of what was first generation fire retardant plywood.

De lamination of the roof sheathing may cause. This is sometimes accompanied by buckling. Leaks around deteriorated flashing are the most common. The attic was vented by soffit and a ridge vents.

It more likely may be the early stages of decay and delamination of the roof sheathing. Defects in those sheets or it could be that the ventilation was blocked only at those sheets. Like blisters delamination can come from improper installation in inclement weather. Panel type roof sheathing may lift off the rafters in a regular pattern.

This may be indicative of what. In determining if it is. But probably not due to the amount of delamination. The worst cases result in patches of rot.

Roof decking plywood delamination if you have a home twenty five years or older you may want to consider the condition of the plywood. The horizontal board enclosing the ends of the rafter projections or tails is normally referred to as the board. In the attic the roof sheathing appears to be delaminating and some staining was observed.