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Old 05-29-2013, 04:35 PM   #1
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Repairing an Almost Flat Roof... ??


I'll be "trying" to repair a roof leak/damage on my back porch roof. It is a very low pitch (almost flat)... From charts I've seen, I would estimate it to be around a (3) degree pitch.

The roof area is roughly 18' x 14'. The damaged area is mostly on the leading edge on back 3-4 feet.

My intention is to replace the decking from the leading edge back (4) feet with new OSB board.

My budget is very tight on this repair. We're budgeting $200-300 or so.

My question is this....

Q: What is the best material to over lay the OSB ?

Here's some pics....

http://public.fotki.com/Labrat0116/deck-and-shed-roof/












Last edited by LabRat0116; 05-29-2013 at 04:45 PM.
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Old 05-29-2013, 04:48 PM   #2
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Repairing an Almost Flat Roof... ??


If the condition of the entire "flat" is as we can see in the pics, your efforts will be for nothing.

Replace all the sheathing thats bad and put a completely new roof on the entire flat.

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Old 05-29-2013, 04:56 PM   #3
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Repairing an Almost Flat Roof... ??


There's nothing I can see in those pictures that was done right I agree 100%.
Looks like someone may have tryed to use rolled roofing whiich is the lowest of the low grade roofing then tryed to goop on tar to stop it from leaking.
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Old 05-29-2013, 05:01 PM   #4
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Repairing an Almost Flat Roof... ??


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Originally Posted by AndyWRS View Post
If the condition of the entire "flat" is as we can see in the pics, your efforts will be for nothing.

Replace all the sheathing thats bad and put a completely new roof on the entire flat.
The back half is actually leak free and in good shape.

I simply don't have the budget to redo the whole thing. Perhaps down the road maybe.

I really need to STOP what is leaking right now and repair whatever damage I can.



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Old 05-29-2013, 05:04 PM   #5
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Repairing an Almost Flat Roof... ??


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There's nothing I can see in those pictures that was done right I agree 100%.

Looks like someone may have tryed to use rolled roofing whiich is the lowest of the low grade roofing then tryed to goop on tar to stop it from leaking.
I agree. This is how we bought it several years ago.

However, I am the culprit for using about (10) gallons of roofing tar over the years.

Anyways, like I said above this, I need to do whatever I can do right now within my limited budget.



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Old 05-29-2013, 05:06 PM   #6
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Repairing an Almost Flat Roof... ??


After I demo the front 1/2 of the roof and put down new OSB, what is the best approach there after ?


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Old 05-29-2013, 05:11 PM   #7
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Repairing an Almost Flat Roof... ??


May as well flush your money down the toilet as to try and fix just 1/2 the roof.
Laying a Heavy duty tarp of it would work better.
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Old 05-29-2013, 05:44 PM   #8
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May as well flush your money down the toilet as to try and fix just 1/2 the roof.
That's great but some of us don't have extra $$$ laying around right now. Gotta do what ya gotta do.

Surely someone can give me some helpful advice.


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Old 05-29-2013, 06:37 PM   #9
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Repairing an Almost Flat Roof... ??


From the looks of the roof at the eaves, the asphalt on this roof is severely alligatored and oxidized. Basically it is shot, and it was not even done right in the first place, so what the guys here have said is correct.

It should not cost you very much to tear off this roof, fix the deck and go back with something like EPDM which is user friendly.

I guess you could cut a couple of 4 inch holes in the deck back where it ponds and insert a couple of lead roof jacks through the holes upside down set in roof cement to release the water, so the damage to the deck does not spread, but it seems easier to fix the deck and just re-roof it. If funds are as low as you say they are you have to worry about eating, before you worry about a porch roof.
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Old 05-29-2013, 06:51 PM   #10
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Repairing an Almost Flat Roof... ??


Amyone notice what was used for rafters and how there attached?
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Old 05-29-2013, 07:16 PM   #11
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Amyone notice what was used for rafters and how there attached?
I guess they are just back nailed, no ledger strip, no hangers. How did this get past the inspectors? Ya never know.
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Old 05-29-2013, 07:23 PM   #12
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Repairing an Almost Flat Roof... ??


And look like just 2 X 4's. Wonder if there's any bounce?
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Old 05-29-2013, 08:26 PM   #13
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Repairing an Almost Flat Roof... ??


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I guess they are just back nailed, no ledger strip, no hangers. How did this get past the inspectors? Ya never know.
No idea. It passed out VA inspection when we bought the place.
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Old 05-29-2013, 08:32 PM   #14
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Repairing an Almost Flat Roof... ??


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And look like just 2 X 4's. Wonder if there's any bounce?
Yep. They're 2 x 4s. Very little bounce actually.

Looks like I'm in for at least a tear off the old roofing material and replacing the lower 1/2 of the OSB sheathing.

Someone mentioned EPDM. I have no idea what that is. Can someone please enlighten me ?

Is this the rubber roofing material ? I've seen that, I'm not sure how it adheres to the underlay.

Do I need felt paper over the OSB for any of these coverings ?

Remember, you're dealing with a layman here. Come to my job (Medical Technologist) and I'm sure folks wouldn't know much about it either! LOL!

Any help is appreciated!
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Old 05-29-2013, 08:35 PM   #15
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Repairing an Almost Flat Roof... ??


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It should not cost you very much to tear off this roof, fix the deck and go back with something like EPDM which is user friendly.
How much would you figure (ballpark).

What is EPDM ???

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