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Old 05-01-2014, 12:30 PM   #1
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What Type of Roof Coating


My 7 year old flat roof isn't necessarily leaking, but we've been having tons of side wall stucco leaks and I would like to coat the roof for added peace of mind. Some of the joints don't seem all that robust to me.

My question is.....what kind of coating would be best for my type of roof? It's light colored grit suspended in what I assume is a type of asphalt sheet. Seems a pretty standard roof material to me.

My plan was to pressure wash to remove dirt and any loose grit, then let it fully dry for a day and coat with something like an elastomeric coating from a supply store. I have easy access to my flat roof, so I was going to do this myself, seems pretty straightforward.

Any thoughts or product preferences for DIY'ers? Any ideas on how I can eliminate little valleys like the one in the pic? Thanks!




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Old 05-01-2014, 02:46 PM   #2
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What Type of Roof Coating


There is all kinds of coatings that are good, and as many or more that are worse. The issue is coatings don't fix leaks on low slope/ flat roofs. If you are getting leaks down walls it's likely there is a problem with the roof it's self.

No pics were attached. If you get some up maybe we could offer some better ideas.

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Old 05-02-2014, 08:56 AM   #3
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What Type of Roof Coating


Did the pic not show up? This should work....


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Old 05-02-2014, 10:31 AM   #4
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What Type of Roof Coating


Looks like the drip edge is just has a mastic over it. If it is that was done wrong. It needs to have a separate piece of felt then modified to strip it in. I'd bet that is why you are getting leaks down walls.

this can be done in cold process.

http://www.specjm.com/files/pdf/RS-4660.pdf
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Old 05-02-2014, 01:35 PM   #5
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What Type of Roof Coating


A roof coating is good to gain additional life out of your SOUND roof and it is a good idea to coat it every few years. . It is not going to repair existing problems with a bad roof.

You need to address the wall areas with a proper fix. It sounds like a termination/flashing issue which is not difficult to repair once you determine the exact problem but a coating is not the fix. THEN go ahead and coat the whole roof if you like as this will increase the useful life of the roof. You can use an elastomeric if you like but aluminum coat is going to give you the same benefit at a lower cost. Both products are only going to be a uv blocker basically and little else. The sun is the biggest enemy of your roof.

Inspect it every two or three years and re-coat when necessary.

Show us the stucco wall if you can
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Old 05-02-2014, 01:37 PM   #6
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Hmmm, just noticed no cant strip on the wall in that pic. Not a good sign
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Old 05-02-2014, 02:34 PM   #7
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What Type of Roof Coating


Quote:
Originally Posted by OldNBroken View Post
Hmmm, just noticed no cant strip on the wall in that pic. Not a good sign
Good catch.

@op while the lack of cant strip may not be a problem now it will cause the sheets to break at the angle change in the future. The top of the wall should have really had a cap metal also instead of a gravel stop .Very hard to strip in a gravel stop on a 2x6 wall with a proper striping material.

Again I bet the leaks are caused by the drip edges/gavel stop not being striped in properly.


Everything OldNbroken said about coatings is spot on.
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Old 05-02-2014, 06:49 PM   #8
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What Type of Roof Coating


Gravel stop...gravel schmop.

Nothing twelve tubes of caulking can't fix.
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Old 05-04-2014, 07:18 PM   #9
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What Type of Roof Coating


Thanks a ton for the feedback everyone. Roofer is coming in a week to swap out two incorrectly installed skylights, I'll direct his attention to the items above and see what he thinks. I'll get that sort and THEN do some form of coating. Will update next week with anything of interest. Thanks again!

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