Others are galvanized steel with a lead collar.
May lead to delamination of the roof sheathing.
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.
Particularly on the roof.
There are two kinds of flashing used to seal vents.
De lamination of the roof sheathing may cause.
Buckling can weaken the roof by separating the sheathing from the rafters or trusses.
This may be indicative of what.
It was plywood and had delaminated.
Roof blisters and delamination.
You are saying this was a 1964 build.
Some versions are made completely from lead.
If fasteners pull through the sheathing the entire roof covering and sheathing becomes loose and may be blown off during high winds.
When delamination is extensive the sheet products lose their structural integrity resulting in a spongy subfloor weak roof sheathing or bulging exterior siding.
3 8 plywood roof sheathing.
What might delamination of the roof sheathing lead to.
And like any other roof penetration that sometimes means trouble.
But probably not due to the amount of delamination.
Mostly in the mid 70 s that i have seen that.
It may be mfgr.
The contractor thought it might have been due to excess moisture in the attic.
Defects in those sheets or it could be that the ventilation was blocked only at those sheets.
Know the differences and protect your roof blisters and delaminations aren t the same issue but they have similar symptoms and cause similar problems.
This looks like an earlier build.
I have seen this type of delamination and was caused by a bad batch of plywood or defective from the manufacturer.
Check the plywood sheathing particularly at the panel edges for evidence of delamination.
They both attack the roof s surface and if left to fester both make a roof system more susceptible to wind and water damage.
This winter i went up.
A boot that relies on a snug rubber seal and all metal flashing with soft lead that can be bent over and into the pipe.
I had my roof sheathing replaced a year ago.
Roof decking plywood delamination if you have a home twenty five years or older you may want to consider the condition of the plywood.
Depression between the rafters.
Between the years of around 1964 to 1975 homes being built saw the installation of what was first generation fire retardant plywood.
The horizontal board enclosing the ends of the rafter projections or tails is normally referred to as the board.
Delamination may also occur in cabinets and other furniture products that are made from finish grade laminated wood.
