Posted by GL on January 30, 2000 at 09:29:22:
You should have 1" of loose gravel on top of the tar to protect it from the sun. Over time it washes away and disappears into your lawn.
If you do it in real cold weather (like now)the top layer of tar can be scraped off along with the embedded gravel.
Then you recoat with tar, and put on fresh gravel.
Obviously this is easier and cheaper than replacing the whole thing, yet it results in a roof that will last as long as a new one, and for all practical purposes is new.
But you can only do it if your roof is still in good shape. If you let it go for too long the whole thing needs to be replaced.
Since I can’t see your roof from here you will have to get some local roofers to look at it and give you a price.
My new roof cost under $3 per square foot for a 5 ply tar and gravel job.No new boards or rafters were necessary. You should be able to do better if you get competitive bids.
If it only needs some repair and recoating it should be less than half.
Make sure you get someone who has a tar pot and is experienced on that type roof. Don’t let them sell you the rubberised membrane unless you have almost enough slope to use shingles, and the roof drains so well you never have water laying on it.