May Lead To Delamination Of The Roof Sheathing

This may be indicative of what.

May lead to delamination of the roof sheathing.

Depression between the rafters. One of the implications of high moisture levels from either condensation or leakage is delamination of plywood sheathing. Like blisters delamination can come from improper installation in inclement weather. If this is the case the solution is twofold.

Roof decking plywood delamination if you have a home twenty five years or older you may want to consider the condition of the plywood. Defects in those sheets or it could be that the ventilation was blocked only at those sheets. High moisture levels break down the glue in the plywood and allow the plies to delaminate. Between the years of around 1964 to 1975 homes being built saw the installation of what was first generation fire retardant plywood.

This is sometimes accompanied by buckling. But probably not due to the amount of delamination. The worst cases result in patches of rot. To improve it make sure your home has continuous ridge and soffit ventilation.

The soffits didn t appear to be congested with insulation however the ridge vent had a filter in place. Every re roof requires a close inspection of the substrate. De lamination of the roof sheathing may cause. The horizontal board enclosing the ends of the rafter projections or tails is normally referred to as the board.

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 contractor thought it might have been due to excess moisture in the attic. If the environment is humid moisture can get trapped between the membrane and insulation. Panel type roof sheathing may lift off the rafters in a regular pattern.

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. In determining if it is. Incidental roof leaks particularly ones that go unnoticed can delaminate plywood sheathing or cause osb to swell.

That being said what the home inspector saw may or may not be mold. What might delamination of the roof sheathing lead to. Particularly on the roof. What is the spacing requirements between the insulation and the roof deck sheathing at the location of the vent.

The attic was vented by soffit and a ridge vents. First deal with the cause which is inadequate attic ventilation. It may be mfgr. Leaks around deteriorated flashing are the most common.

I had my roof sheathing replaced a year ago. Delaminations commonly affect single ply and fully adhered roofs. When the membrane and insulation separate.