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Old 04-11-2007, 02:24 PM   #1
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tar and gravel repair


I have a tar and gravel roof that I would like to attempt to repair myself.

What is happening is water is pooling at the drip edge and rotting out only the last decking board in certain areas.

I got an estimate (but I can't afford it, yes, I know, I can't afford NOT to do it) and they are going to spud back the rock and tar, replace the decking, and apply fiber glass felts with cold adhesive and then spread the rock back.

Can I get some advice on how I can do this?

I feel confident I can spud the rock and replace the decking myself.
Laying down the felt and the adhesive not so much.

Thx for your response.

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Old 04-11-2007, 03:44 PM   #2
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tar and gravel repair


just like they decribed, but before the rock, make sure to brake a piece of perimeter flashing to match the existing (I surely hope its not drip edge) and secure into the nailers, prime, jute it into a bed of cement laying back to accept the new felts to be plied over the new metal. and then strip it in with two plies of felts feathered to the outside, flood coated, and gravelled back in.

If I was doing it, I would use hot asphalt instead of cold.

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Old 04-11-2007, 05:30 PM   #3
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tar and gravel repair


Using a spud bar to carefully dislodge only the gravel surface is alot trickier than it sounds. It takes a certain amount of finesse so as not to further puncture the remaining plies of felt paper.

Cold applied emulsion tar-like products remain more pliable and may run from the area patched and drip off or onto a lower elevation, such as melting and dripping over the "drip edge" material currently in place. A proper sheet metal "gravel stop" metal needs to be installed as Aaron was eluding to.

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Old 04-11-2007, 07:12 PM   #4
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tar and gravel repair


I think I confused the drip edge with the gravel stop. There is already one of those in place.

So are the steps then:

Spud rock and tar all the way off the rotting boards and replace them.
Spud rock and tar down to the felt on surrounding areas.
Put some adhesive under the gravel stop and nail it in place.
Lay down adhesive and feather felt into surrounding areas.
Spread Gravel back over.

What do you mean when you say prime?
When you say flood, does that mean soak the felt in adhesive?
Also, what felt and adhesive do you recommend. I know you prefer
hot tar but I can't do that.

Off topic: I made a fiberglass subwoofer box once. In general, is the
concept the same? The felt soaks up the resin and dries. To add
strength you add patches of fiber and soak them too.
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Old 04-12-2007, 07:41 AM   #5
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tar and gravel repair


Call me at the number listed in my website, and Ill explain it...it's too much too type.
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Old 04-12-2007, 01:47 PM   #6
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tar and gravel repair


In the northeast we call it a scratch bar instead of a spud bar. spud is for potatoes not roofs. is the roof ashphalt or coal tar?

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Old 04-12-2007, 10:09 PM   #7
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tar and gravel repair


Over here scratch is what you get when your done $$$$


Cement, Plastic, Bull, It's all the same it's all good!
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Old 04-13-2007, 05:02 AM   #8
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Scratch means you have an itch.

Get with the program, Jim.
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Old 04-13-2007, 02:54 PM   #9
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tar and gravel repair


LoL! you midweterners are wacky, I knew a roofer form vegas once who called Karnak "pookey" mabee he made that term up I dont know.


Last edited by RooferJim; 04-13-2007 at 03:12 PM.
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