In addition to what Larry and doug said, it may be that you have a 15 year
shingle on your roof and they are approaching their max life. Start
planning now using what the other guys have saide with with regard to
ventilation and color. Color has been sown to be one of the biggest factors
in reflecting/ absorbing heat toward the interior. Also, if you find that
you have adequate soffit and ridge ventilation you might also consider a
powered ventilating fan in the roof. It made an amazing difference in my
house.


"Sean" wrote in message
...
Hi all,

I have some shingles (not sure what type) on the house I just bought. The
shingles are about 13 years old. Some of them are starting to curl up a
bit.
I'm wondering, how to you know exactly when you should be replacing the
shingles?

Thanks for any info!