May Lead To Delamination Of The Roof Sheathing

But probably not due to the amount of delamination.

May lead to delamination of the roof sheathing.

3 8 plywood roof sheathing. The soffits didn t appear to be congested with insulation however the ridge vent had a filter in place. Depression between the rafters. Delaminations commonly affect single ply and fully adhered roofs.

When the membrane and insulation separate. If the environment is humid moisture can get trapped between the membrane and insulation. In the attic the roof sheathing appears to be delaminating and some staining was observed. Incidental roof leaks particularly ones that go unnoticed can delaminate plywood sheathing or cause osb to swell.

The attic was vented by soffit and a ridge vents. The contractor thought it might have been due to excess moisture in the attic. Leaks around deteriorated flashing are the most common. What might delamination of the roof sheathing lead to.

Roof decking plywood delamination if you have a home twenty five years or older you may want to consider the condition of the plywood. Between the years of around 1964 to 1975 homes being built saw the installation of what was first generation fire retardant plywood. Defects in those sheets or it could be that the ventilation was blocked only at those sheets. Particularly on the roof.

The worst cases result in patches of rot. One of the implications of high moisture levels from either condensation or leakage is delamination of plywood sheathing. De lamination of the roof sheathing may cause. This is sometimes accompanied by buckling.

That being said what the home inspector saw may or may not be mold. This may be indicative of what. I had my roof sheathing replaced a year ago. 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.

To improve it make sure your home has continuous ridge and soffit ventilation. It may be mfgr. What is the spacing requirements between the insulation and the roof deck sheathing at the location of the vent. In determining if it is.

Like blisters delamination can come from improper installation in inclement weather. This winter i went up. First deal with the cause which is inadequate attic ventilation. Every re roof requires a close inspection of the substrate.

High moisture levels break down the glue in the plywood and allow the plies to delaminate. It was plywood and had delaminated. Panel type roof sheathing may lift off the rafters in a regular pattern.