Re: Flat roof replaced? - Posted by GL(ON)
Posted by GL(ON) on January 31, 2002 at 10:45:54:
I wouldn’t mess around with a flat roof. A shingle roof OK, but not a flat roof. There are too many problems with a cheap flat roof.
About 5 years ago I replaced a flat roof about 40X45 feet. Bids ranged from $1800 (membrane) to $5000 (5 ply tar and gravel). I took the $5000 job and never regretted it.
I looked into the membrane or torch down. This is a rubberised roll roofing where the seams are melted together with a torch. The manufacturer doesn’t recommend it for a flat roof, or one where the water can lay. Only a roof with a slight slope.
If you have a slight slope maybe it’s OK but I have heard horror stories about it on a flat roof, even when installed by a professional, but especially when installed by a roofer who is not experienced it that type roof.
Same for the roll roofing, that is for a sloping roof only.
A pitched roof is much better and cheaper to repair, but if you have to have a whole new roof installed over a flat one, it may well cost more than a good flat roof. Once it’s done it’s cheap to reshingle though.
Here is a tip given me by my roofer. The roof deteriorates as the top surface of tar dries out and wears away. This is why they put gravel on, to protect it. Well if you get a roofer to go up there every 10 or 15 years and recoat the roof it will NEVER wear out! They just sweep aside the gravel, scrape off the surface, give it a coat of hot tar, and spread the gravel back over it.
So if you have a tar and gravel roof and it isn’t too far gone, you may be able to have the leaks repaired and the whole roof recoated, and it will be good as new.
The winter is the best time to have this done. You get a thicker coat of tar and the workers don’t perish to death from the heat.