May Lead To Delamination Of The Roof Sheathing

The contractor thought it might have been due to excess moisture in the attic.

May lead to delamination of the roof sheathing.

To improve it make sure your home has continuous ridge and soffit ventilation. I had my roof sheathing replaced a year ago. It was plywood and had delaminated. The attic was vented by soffit and a ridge vents.

Depression between the rafters. When the membrane and insulation separate. Panel type roof sheathing may lift off the rafters in a regular pattern. Between the years of around 1964 to 1975 homes being built saw the installation of what was first generation fire retardant plywood.

It more likely may be the early stages of decay and delamination of the roof sheathing. In the attic the roof sheathing appears to be delaminating and some staining was observed. But probably not due to the amount of delamination. What is the spacing requirements between the insulation and the roof deck sheathing at the location of the vent.

Delaminations commonly affect single ply and fully adhered roofs. 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. The soffits didn t appear to be congested with insulation however the ridge vent had a filter in place. This may be indicative of what.

If this is the case the solution is twofold. Defects in those sheets or it could be that the ventilation was blocked only at those sheets. One of the implications of high moisture levels from either condensation or leakage is delamination of plywood sheathing. Roof decking plywood delamination if you have a home twenty five years or older you may want to consider the condition of the plywood.

Leaks around deteriorated flashing are the most common. Every re roof requires a close inspection of the substrate. That being said what the home inspector saw may or may not be mold. 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. In determining if it is. The worst cases result in patches of rot. First deal with the cause which is inadequate attic ventilation.

This is sometimes accompanied by buckling. De lamination of the roof sheathing may cause. It may be mfgr. This winter i went up.

Like blisters delamination can come from improper installation in inclement weather. What might delamination of the roof sheathing lead to. 3 8 plywood roof sheathing.