Damaged Roof Plywood
This roof plywood damage isn't uncommon
if your roof isn't maintained or replaced when it it can no
longer be repaired.
The wood damage was caused when the roof
shingles at the edge of the roof were damaged, allowing water to
roll underneath them.
The biggest problem with water underneath your roofing is that
it's normally easy for the water to seep into the cracks and on
top of the wood framing and sit there for long periods of time.
The roofing material acts as a moisture
barrier and will rarely let moisture evaporate that is
underneath it. This isn't good for the wood of course.
In other words, the damaged roofing materials allow the water
in, but don't let the water evaporate out. If you look at the roof rafter, you will
notice a fungus almost covering the entire bottom of the rafter.
Wood fungus is a good sign that no one was maintaining this
property.
Home Repair Tip: The damage plywood will need to be replaced,
this will involve removing the roofing, removing the plywood and
then you're going to need to check for additional roof rafter
damage.
The roof rafter in the picture above will
definitely need to be claimed and then closely examined to see
if it is still structurally sound.
The damage at the edge of the roof is extremely common and these
areas seem to suffer from not only wood rot, but termite damage.
Don't forget that moisture or wet wood often
attracts termites.