I have a twenty-two year old home. I am assuming that the builder
quality shingles used in construction of the house mean I should be
looking at a new roof...soon!

This will be the first roof I have ever replaced. One company,
check-rated in the local consumer guide, came and gave me an estimate
for reshingling over the old roof.

Another company, with a good reputation but not check-rated in the
same guide, said they would not re-roof over an old roof and gave me
what sounded like reasonable reasons for so arguing.

Leaves me up in the air: two seemingly good companies, one saying
reshingle, the other saying don't.

What's the common wisdom on this? Reshingle or tear up the old
shingles and do a new roof?

Many thanks,
bob