When the sun shines it dries.
Would a roof sag if plywood got wet.
When the air underneath circulates it will dry.
Soaking wet roof decking osb roof sheathing gets rained on all the time up here and roofs are the first cover to go on a framed structure.
The underside will breathe.
I thought i would share my experience and how i managed to save those sheets.
The roof was put on in late 1997 so it isn t very old at all.
Roof problems may have started with wet plywood originally published april 28 2012 at 5 00 am updated april 28 2012 at 7 01 am home fix.
Rafters run from the peak of the roof.
When rain water comes through your roof s shingles the plywood will wrap rot or weaken and this will make the roof look like it is sagging between its rafters.
I haven t had any problems and the house is 40 years old but it bothers me when i walk on the roof and feel the roof sag under my weight.
I am thinking of having an additional layer of plywood or osb added to the roof.
The minimum plywood for roofing.
This raises a question can plywood get wet.
Remedies for a sagging roof there are a number of remedies for traditional rafter style roof frames depending on the problem and its severity.
With the shingles on it sill still breathe.
My neighbor had an additional 3 8 layer of plywood added.
The top 3 sheets of plywood got wet and were actually soaked in water.
Plywood can get wet over short periods of time and be dried out and still maintain its strength and finish.
Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component.
Often the framing can be bolstered and beefed up internally but if the roofing material needs replacement anyway it may be best to tear off the old sheathing and install larger rafters while the roof.
It is possible that the top side was wet when they put the roofing materials on and over time the wood got soft and sagged.
Some problems relating to a sagging roof line should definitely be evaluated by a professional in the roofing industry.
Also there don t seem to be any sags or dips on the east facing side of the roof or if there are they are much smaller and barely noticable.
Address any edges that are of concern to make the roof level and flat before installing the finished roof material but this should not be done until the panels have.
