"JoeSpareBedroom" wrote in message
.. .
"Ben" wrote in message
...
I moved into my house not too long ago and had the first occasion to
want to go up to the roof yesterday. It looks like there are three
layers of shingles. I've read that you should never have more than
two layers of shingles because of the weight. How much should I worry
about this?

Thanks for your input,
-Ben


In addition to what the others have said, I'd pay a visit to whoever did
the home inspection and kick him in the teeth. Then get your money back.

Assuming he had a home inspector. Even so, many give the roof a cursory
inspection and pronounce it good or bad and if the top layer looks good, he
would not do any in depth inspecting.

As for the number of layers, there are probably tens of thousands of houses
with three layers. There is the potential for problems, but I'd not act too
quickly. If it has been on there for 10 years, I'd do nothing until it was
time to re-roof. Not knowing the construction, none of us can say if there
is serious danger from the weight. Pitch, snow load, type of rafter or
truss, etc. all play a part. Just look at the weight of the older slate
roofs.