"Robert11" wrote in message
...
Hello,

Live outside of Boston.

Know there are a zillion variables involved, as well as brand and quality
level, but what is a typical
lifespan for roof shingles on a residence (when they should be replaced) ?

Assume the quality level of these original shingles was probably
"average,"
undoubtedly not the best,
or heaviest, available at the time (some 25 yrs ago).

Thanks,
Bob



20-25 year life span was normal 25 years ago. They should be replaced not
later than when they start to fail. Some signs of failure are missing
pieces, curling, bare spots with no granules, a swollen look.

That said I had some 20 year shingles nailed over a roof in 1983. I
replaced it this year. It was not failing. I could have used it for 2-3
more years or more but I had to humor an insurance company.

Colbyt