If you have a 40 year old roof there could be a problem even if it looks good from the ground how much time you ve got left.
How mamy shingles off roof before it has to be replaced.
However shingle color difference due to age and weathering does not make the shingles unavailable.
The tear off gets a lot more complicated if you have something other than asphalt up there.
Lastly the shingles have to be currently available on the market.
Moss holds moisture against the roof surface and overtime in freezing climates can cause damage to the granules on the top of the shingles.
If a shingle is missing your roof becomes vulnerable to the elements especially wind and rain.
There are many factors when an insurance adjuster inspects your roof.
If you can see original wood shingles on the underside of your roof when you re up in the attic you ll need not only to tear everything off but also to install new plywood decking all of which likely adds 5 000 or more to your costs.
There are missing shingles missing shingles will need to be replaced right away.
You may need to contact a professional roofing contractor.
Take care not to damage the shingle surface.
Most shingles have pre cut holes for nails usually three per shingle.
Five to 10 years depending on your roof s condition.
This can happen if a piece of debris has been blown into your roof thereby causing a piece of shingle to break off.
If the shingles are backed with adhesive strip remove the covering and push them into place then nail them to secure them.