Home » Public Forums » GMCnet » [GMCnet] SOB membrane roof
| [GMCnet] SOB membrane roof [message #262594] |
Mon, 22 September 2014 23:59  |
GMC.LES
Messages: 505
Registered: April 2014
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Anyone have any recommendations or experience regarding treatment, protection, or maintenance of a rubber membrane roof to prolong it's life and help reduce mold/mildew from forming?
I recently spent a day scrubbing and cleaning the dirty/moldy rooftop of a travel trailer I purchased and don't particularly enjoy the thought of having to repeat the process any time soon.
I'm quite skeptical of the protective treatments offered by the RV specialist shops, primarily because online reviews are all over the place regarding their efficacy.
Curious to know what people here with SOB experience have to say.
Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
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| Re: [GMCnet] SOB membrane roof [message #262614 is a reply to message #262594] |
Tue, 23 September 2014 09:00  |
Gatsbys' Cruiser
Messages: 91
Registered: August 2014
Location: Illinois
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Hi Les
Well the answer is not all junk.
Before the GMC, I had an older MALLARD sticks and staples coach. The PO had placed the spare, on the aluminum roof and due to vibration, electrolisis from the rim, and corrosion, I had a lot of holes and leaks.
I bought KOOL SEAL which can be applied by roller ( VERY MUCH SUGGESTED ). It applies easy but you will most likely apply more than one coat. Around hatches, vents, railing standups you put a cloth around the seams and soak it with KS which prevents cracking from movement.
I had this stuff on the coach well over 10 years so I can say with confidence that it worked.
The result of using KOOLSEAL is this....
KOOLSEAL is bright white when applied. YOU IMMEDIATELY NOTICE the DROP of temperature from the sun.
KOOLSEAL will get dirty from rain and such but a simple cleaning once a year or two takes care of that, it is not a big job.
When I applied the product to the holes where the spare sat, I used the cloth to reinforce the roof sealant. From this, I never had another leak in well over 10 years and if any roof should have had a leak, this one was top on that list. I only applied the KS that one time in all those years.
Now speaking of GMC's, KOOLSEAL would work on the top, out of sight roof area but because it develops its own "ripple" look from application, it probably is not a good idea to apply over the crest and down to the rain gutters, or the visible area from the side. But because of the ability to stop the heat infiltration from the roof, it still would help keep the heat out and definately seals out the water.
On a flat roof like my MALLARD had, KOOLSEAL forms a flat one-piece roof seal, much like the membrane one piece but KS is easier to install.
Just my experience.........
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| Re: [GMCnet] SOB membrane roof [message #262626 is a reply to message #262614] |
Tue, 23 September 2014 11:35 |
GMC.LES
Messages: 505
Registered: April 2014
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I had a quick look at the roof sealing/treatment products from both Kool Seal and Dicor. Both have good reviews, but I think they are best suited for application once a membrane roof is showing major distress. Dan's recommendations appear to be quite common regarding membranes that are still in very good condition.
My biggest concern is that my trailer will spend a good portion of its time parked in the shade of some trees, so mold and mildew has a good chance of developing. I know i'll have to sweep and wash the roof several times a year, but don't look forward to having to scrub the roof again soon.
Is there a product that anyone has used that helps reduce mold/mildew growth, but won't hinder adhesion of any roof repairs in the future?
Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
On Sep 23, 2014, at 10:00 AM, StanC wrote:
Hi Les
Well the answer is not all junk.
Before the GMC, I had an older MALLARD sticks and staples coach. The PO had placed the spare, on the aluminum roof and due to vibration, electrolisis
from the rim, and corrosion, I had a lot of holes and leaks.
I bought KOOL SEAL which can be applied by roller ( VERY MUCH SUGGESTED ). It applies easy but you will most likely apply more than one coat.
Around hatches, vents, railing standups you put a cloth around the seams and soak it with KS which prevents cracking from movement.
I had this stuff on the coach well over 10 years so I can say with confidence that it worked.
The result of using KOOLSEAL is this....
KOOLSEAL is bright white when applied. YOU IMMEDIATELY NOTICE the DROP of temperature from the sun.
KOOLSEAL will get dirty from rain and such but a simple cleaning once a year or two takes care of that, it is not a big job.
When I applied the product to the holes where the spare sat, I used the cloth to reinforce the roof sealant. From this, I never had another leak in
well over 10 years and if any roof should have had a leak, this one was top on that list. I only applied the KS that one time in all those years.
Now speaking of GMC's, KOOLSEAL would work on the top, out of sight roof area but because it develops its own "ripple" look from application, it
probably is not a good idea to apply over the crest and down to the rain gutters, or the visible area from the side. But because of the ability to
stop the heat infiltration from the roof, it still would help keep the heat out and definately seals out the water.
On a flat roof like my MALLARD had, KOOLSEAL forms a flat one-piece roof seal, much like the membrane one piece but KS is easier to install.
Just my experience.........
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| Re: [GMCnet] SOB membrane roof [message #262635 is a reply to message #262626] |
Tue, 23 September 2014 13:03 |
Joe Weir
Messages: 769
Registered: February 2013
Location: Columbia, SC
Karma: 7
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Les Burt[1 wrote on Tue, 23 September 2014 11:35]
Is there a product that anyone has used that helps reduce mold/mildew growth, but won't hinder adhesion of any roof repairs in the future?
Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
...other than a carport or garage?  ...
No, however, I would think a stepladder and one of those soap dispenser sprayers used regularly would keep the scrubbing away.
One trick I have used with any dirt/mold/grunge build up is to hit it right after a soaking rain. The water has made the debris soft and it comes right off without any real effort on the brush.
76 Birchaven - "Wicked Mistress" - New engine, trans, alum radiator, brakes, Sully airbags, fuel lines, seats, adult beverage center... those Coachmen guys were really thinking about us second hand owners by including that beverage center...
Columbia, SC.
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| Re: [GMCnet] SOB membrane roof [message #262667 is a reply to message #262594] |
Tue, 23 September 2014 18:38 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Yeh, there's a product.. Clorox. Cup of it, cup of detergent, cut with water to about a third, and the mold/mildew washes right off. Works great on the GMC, I think I'd flood rinse it on a membrane to be sure it doesn't weaken the material. Wear gloves, goggles or a face shield, and old clothes because splatters will bleach hands, eyes, and clothes.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] SOB membrane roof [message #262669 is a reply to message #262667] |
Tue, 23 September 2014 18:56 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Use non-ammonia based detergent product with the bleach. Nasty chemical to other way.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] SOB membrane roof [message #262739 is a reply to message #262676] |
Wed, 24 September 2014 11:28 |
GMC.LES
Messages: 505
Registered: April 2014
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I used Tylex after trying a bleach and detergent mix. The Tylex worked better for some reason. I'll have to try the grain alcohol treatment if I see any mold growth in the future.
As much as I was hoping for a miracle treatment, I had more or less accepted that an occasional scrub was going to be necessary if I want to keep the roof looking spiffy. Fact is that nobody ever sees the dirty roof other than me when I'm doing my inspections, so if I'm too lazy to scrub, it's only my pride that suffers.
Thanks for the suggestions.
Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
On Sep 23, 2014, at 8:55 PM, Nelson wrote:
If you want to kill mold use a 10% grain alcohol /water mix. Bleach and detergent mix will remove it, but doesn't kill it. Living in Florida this is something we have some experience with :-(
Nelson Wright
Belle Isle Fl.
78 Royale Rear bath
Sent from my iPad
> On Sep 23, 2014, at 7:56 PM, Thomas Phipps wrote:
>
> Use non-ammonia based detergent product with the bleach. Nasty chemical to other way.
> Tom, MS II
> --
> 1975 GMC Avion
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| Re: [GMCnet] SOB membrane roof [message #262791 is a reply to message #262739] |
Thu, 25 September 2014 06:26 |
Jim at the Co-op
Messages: 291
Registered: May 2014
Location: Orlando Florida
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Aluminum sheet like we have does not leak, putting a rubber coating over
aluminum does nothing. Leaks are at roof penetrations, use good sealant
there and it's all good. The main roof leaks are on the side rails.
Remove, seal under tham properly and reinstall and they will not leak.
Saw a strayed on roof that started to peal-- the roof of that GMC looked
like a Geapet ! Mold was sticking up in ladders coming out of the cracks,
really nasty and time consuming to scrape that all off. The owner lost his
mind when he saw how much labor it took to fix it. Man, don't do that.
I'm trying the rubber stuff on a roof to see what happens, doing it in
place of painting not to seal the roof. It still may peal and mess up. I
would not try this idea
Jim Bounds
----------------------------
On Wed, Sep 24, 2014 at 12:28 PM, Les Burt wrote:
> I used Tylex after trying a bleach and detergent mix. The Tylex worked
> better for some reason. I'll have to try the grain alcohol treatment if I
> see any mold growth in the future.
>
> As much as I was hoping for a miracle treatment, I had more or less
> accepted that an occasional scrub was going to be necessary if I want to
> keep the roof looking spiffy. Fact is that nobody ever sees the dirty roof
> other than me when I'm doing my inspections, so if I'm too lazy to scrub,
> it's only my pride that suffers.
>
> Thanks for the suggestions.
>
> Les Burt
> Montreal
> 1975 Eleganza 26ft
> A work in Progress
>
>
>
> On Sep 23, 2014, at 8:55 PM, Nelson wrote:
>
> If you want to kill mold use a 10% grain alcohol /water mix. Bleach and
> detergent mix will remove it, but doesn't kill it. Living in Florida this
> is something we have some experience with :-(
> Nelson Wright
> Belle Isle Fl.
> 78 Royale Rear bath
>
> Sent from my iPad
>
>> On Sep 23, 2014, at 7:56 PM, Thomas Phipps wrote:
>>
>> Use non-ammonia based detergent product with the bleach. Nasty chemical
> to other way.
>> Tom, MS II
>> --
>> 1975 GMC Avion
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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> GMCnet mailing list
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| Re: [GMCnet] SOB membrane roof [message #262816 is a reply to message #262594] |
Thu, 25 September 2014 21:30 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
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I just washed mine. Used Simple green and a rag. The SG did all the heavy lifting so no scrubbing needed. Mostly just dirt here in AZ. My buddy has a 1998 and he just recoated it for the first time. These rubber roofs are pretty good, IMO.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] SOB membrane roof [message #262820 is a reply to message #262816] |
Thu, 25 September 2014 21:50 |
GMC.LES
Messages: 505
Registered: April 2014
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If your buddy's roof has lasted that long in the Arizona sun, then I doubt I need to worry much about longevity. My biggest concern is that repeated bleach scrubs might reduce the life.
Simple Green is also what I use to remove the dirt and grime. It has no effect on mold & mildew, which is why the Tylex was used. Tylex is a bottled mix of bleach and detergent and worked better than a DIY mix i tried.
Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
On Sep 25, 2014, at 10:30 PM, Chris Choffat wrote:
I just washed mine. Used Simple green and a rag. The SG did all the heavy lifting so no scrubbing needed. Mostly just dirt here in AZ. My buddy has a
1998 and he just recoated it for the first time. These rubber roofs are pretty good, IMO.
--
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley Featuring: 455, Power Drive, 3:21, Rockwell, Jim B QJET, Qbag. SOLD!
2010 Nomad 24 Ft Travel Trailer
Photosite: Chrisc "It has Begun"
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