May Lead To Delamination Of The Roof Sheathing

The attic was vented by soffit and a ridge vents.

May lead to delamination of the roof sheathing.

What might delamination of the roof sheathing lead to. Delaminations commonly affect single ply and fully adhered roofs. High moisture levels break down the glue in the plywood and allow the plies to delaminate. If the environment is humid moisture can get trapped between the membrane and insulation.

De lamination of the roof sheathing may cause. This winter i went up. In determining if it is. The soffits didn t appear to be congested with insulation however the ridge vent had a filter in place.

Leaks around deteriorated flashing are the most common. Defects in those sheets or it could be that the ventilation was blocked only at those sheets. To improve it make sure your home has continuous ridge and soffit ventilation. 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 contractor thought it might have been due to excess moisture in the attic. I had my roof sheathing replaced a year ago. This is sometimes accompanied by buckling. That being said what the home inspector saw may or may not be mold.

Every re roof requires a close inspection of the substrate. It may be mfgr. 3 8 plywood roof sheathing. But probably not due to the amount of delamination.

In the attic the roof sheathing appears to be delaminating and some staining was observed. It more likely may be the early stages of decay and delamination of the roof sheathing. What is the spacing requirements between the insulation and the roof deck sheathing at the location of the vent. Depression between the rafters.

One of the implications of high moisture levels from either condensation or leakage is delamination of plywood sheathing. The horizontal board enclosing the ends of the rafter projections or tails is normally referred to as the board. When the membrane and insulation separate. Incidental roof leaks particularly ones that go unnoticed can delaminate plywood sheathing or cause osb to swell.

This may be indicative of what. Panel type roof sheathing may lift off the rafters in a regular pattern. The worst cases result in patches of rot. Between the years of around 1964 to 1975 homes being built saw the installation of what was first generation fire retardant plywood.

Particularly on the roof. 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.