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Hemi Joel
Minnesota
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Joined: 07/24/2014
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I am a commercial/industrial roofing contracor. We have installed millions of square feet of EPDM on flat roof buildings over the last 40 years. Believe me, you do not need to coat EPDM. A good EPDM will last over 30 years before it starts to break down. The problem with an RV roof is the penetrations. If I flashed commercial roof penetrations the way RV manufactures do, I'd be in prison. So maintain your penetrations. Do not let any cracks go, inspect often, do not let any water get under your roof. Water under the roof breaks down the surface of the underlayment and the bond to the EPDM will be lost. Dicor works fine at keeping up on them. The biggest enemy of EPDM is oil. Do not repair it with asphalt plastic cement, or anything oily, and do not clean it with anything oily. It is not necessary to clean your roof, but if you feel like you want to just because, use mild soap and water. I have 35 year old roofs that have never been cleaned. But DO scrub the repair areas clean with soap and water and a scotchbrite pad before applying the Dicor, this will help it stick.
2018 Eagle Cap 1163 triple slide, 400W solar, MPPT, on a 93 Dodge D350 Cummins, DTT 89 torque converter, big turbo, 3 extra main leafs, Rancho 9000s rear, Monroe gas magnums front, upper overloads removed, home made stableloads, bags.
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gitpicker2009
texas
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Joined: 05/23/2009
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There's a company here in Houston that will remove your old rubber EPDM roof and replace it with a spray on bedliner type product, which is nearly indestructible. When my roof gets old enough to need repairs, that's what I'm going to do. And their pricing was unbelievably LOW compared to doing another rubber roof. You should see if there are people in your area that offer that service.
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notsobigjoe
southeast
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Joined: 09/15/2016
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I would like a product that perhaps could spray over the EPDM and make the rain a little quieter. Off topic but I wonder...
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Hemi Joel
Minnesota
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If your spray on bedliner leaks into your truck bed, you don't know or care.
Nobody tosses heavy tool boxes or cinder blocks onto, or drags chains across their camper roof.
I would stick with a product designed and proven for the application. There is no better product for a low-slope roof than EPDM.
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rhagfo
Portland, OR
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Joined: 07/06/2012
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wanderingbob wrote:HENGS Heng’s
I used as well and really like it. Scrubbed roof with Tide powdered detergent first rinsed well then applied the next day, two thin coats per instructions.
Russ & Paula the Beagle Belle.
2016 Ram Laramie 3500 Aisin DRW 4X4 Long bed.
2005 Copper Canyon 293 FWSLS, 32' GVWR 12,360#
"Visit and Enjoy Oregon State Parks"
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mkirsch
Rochester, NY
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Joined: 04/09/2004
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Hemi Joel wrote:If your spray on bedliner leaks into your truck bed, you don't know or care.
Nobody tosses heavy tool boxes or cinder blocks onto, or drags chains across their camper roof.
I would stick with a product designed and proven for the application. There is no better product for a low-slope roof than EPDM.
It's a spray on bedliner "TYPE" product, as in something that sprays on thick. Not necessarily bedliner.
Putting 10-ply tires on half ton trucks since aught-four.
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sonuvabug
Mid-West Ontario, Canada
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Joined: 06/08/2006
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Thanks All. I appreciate you sharing your insights ...
2007 Adventurer 90fws Truck Camper
2001 FORD F250 SuperCab; 8' box; 4x4, 7.3l diesel, rear Sumo Springs
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BigSwick
FL
New Member
Joined: 08/19/2021
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Hemi Joel wrote:I am a commercial/industrial roofing contracor. We have installed millions of square feet of EPDM on flat roof buildings over the last 40 years. Believe me, you do not need to coat EPDM. A good EPDM will last over 30 years before it starts to break down. The problem with an RV roof is the penetrations. If I flashed commercial roof penetrations the way RV manufactures do, I'd be in prison. So maintain your penetrations. Do not let any cracks go, inspect often, do not let any water get under your roof. Water under the roof breaks down the surface of the underlayment and the bond to the EPDM will be lost. Dicor works fine at keeping up on them. The biggest enemy of EPDM is oil. Do not repair it with asphalt plastic cement, or anything oily, and do not clean it with anything oily. It is not necessary to clean your roof, but if you feel like you want to just because, use mild soap and water. I have 35 year old roofs that have never been cleaned. But DO scrub the repair areas clean with soap and water and a scotchbrite pad before applying the Dicor, this will help it stick.
Is the commercial EPDM the same thickness as what is on most RVs?
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Hemi Joel
Minnesota
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The most common thickness in commercial is 60 mil, which is .060 in thick. It is also available in 45 mil and 90 mil. I'm not sure what thickness they use on an RV.
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sonuvabug
Mid-West Ontario, Canada
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Joined: 06/08/2006
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Hemi Joel wrote:The most common thickness in commercial is 60 mil, which is .060 in thick. It is also available in 45 mil and 90 mil. I'm not sure what thickness they use on an RV.
mil mm inch
60 1.524 0.06 1/16 in
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