Home » Public Forums » GMCnet » [GMCnet] Power washing your roof has pros/cons
| [GMCnet] Power washing your roof has pros/cons [message #338350] |
Sun, 04 November 2018 13:27  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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Senior Member |
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I got annul about the roof not being clean on this 73 that I'm reconditioning a few months ago. So I scrub, and power washed it. Kept getting dirt out of the channel that is between the roof, and side walls. After that time we didn't get much rain. Then as more rain moved in later. The leaks started to appear. I didn't associate the two till last week. So I caulked the area from the back of the door to the front. The leak above the door stopped. Then this morning after a night of rain. I found more small leaks. So it seems that I just rearranged some of the water contaminated dirt. So I think that it's best to do more power washing that seam. Get as much of that remaining wet dirt out. Thus reducing the future water/dirt from corroding the aluminum roof. Plus stop the frozen water from damaging the channel. Then later in the week. Calk that seam to stop further water intrusion in that channel. YES. Power washing caused me a problem. But will stop future damage. Bob Dunahugh
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| Re: [GMCnet] Power washing your roof has pros/cons [message #338355 is a reply to message #338353] |
Sun, 04 November 2018 16:48  |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
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Senior Member |
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Bob, have you tried pressurizing the inside of the coach and using soap
bubbles to detect where the water is getting in at?
You can use a leaf blower, seal up the blower to one of the toll windows.
On Sun, Nov 4, 2018 at 1:34 PM James Hupy wrote:
> Frost heave is a real problem in your area. Heat/cool cycles also. Leak
> checks are a constant activity. Here in Oregon, we have moss that grows on
> the seams, trapping moisture. Always something.
> Jim Hupy
>
> On Sun, Nov 4, 2018, 11:28 AM Bob Dunahugh wrote:
>
>> I got annul about the roof not being clean on this 73 that I'm
>> reconditioning a few months ago. So I scrub, and power washed it. Kept
>> getting dirt out of the channel that is between the roof, and side
> walls.
>> After that time we didn't get much rain. Then as more rain moved in
> later.
>> The leaks started to appear. I didn't associate the two till last week.
> So
>> I caulked the area from the back of the door to the front. The leak above
>> the door stopped. Then this morning after a night of rain. I found more
>> small leaks. So it seems that I just rearranged some of the water
>> contaminated dirt. So I think that it's best to do more power washing
> that
>> seam. Get as much of that remaining wet dirt out. Thus reducing the
> future
>> water/dirt from corroding the aluminum roof. Plus stop the frozen water
>> from damaging the channel. Then later in the week. Calk that seam to stop
>> further water intrusion in that channel. YES. Power washing caused me a
>> problem. But will stop future damage. Bob Dunahugh
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
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--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
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Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
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| Re: [GMCnet] Power washing your roof has pros/cons [message #338373 is a reply to message #338372] |
Mon, 05 November 2018 00:50 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Bob, good decision I believe.
On my 78 Royale, SOME JACKASS previous owner used a BONDO LIKE
material on all the roof seams. They didn't smooth it out nor did they
completely fill the seams. Of course it cracked, of course it leaked. So,
bit by bit, I have ground off that miserable crap, and replaced it with
5200 3M flexible sealant and Captain Tully's wicking wonder stuff. Sure
wish I had access to his knuckles. I would break them one after another.
With a smile on my face.
Jim Hupy
Salem, Or
On Sun, Nov 4, 2018, 10:34 PM Bob Dunahugh wrote:
> Jerry. There's just too much risk of breaking the screws off in removal.
> As I see it. I want to flush out all the dirt I can with the power washer.
> Let dry for a week or two. Then seal the seam. Bob Dunahugh
>
>
> ________________________________
> From: Bob Dunahugh
> Sent: Sunday, November 4, 2018 7:05 PM
> To: gmclist@list.gmcnet.org
> Subject: RE: Power washing your roof has pros/cons
>
>
> Bruce. I've done the pressurizing the GMC bubble trick. Works great as
> long as you have the volume. Never thought of using a big leaf blower. I
> didn't do it this time. At this point. I've only caulked half of the right
> side. I'm going to do more power washing of what I haven't sealed. I'm
> thinking that there's more dirt that needs to be cleaned out in that
> joint. Bob Dunahugh
>
>
> ________________________________
> From: Bob Dunahugh
> Sent: Sunday, November 4, 2018 1:27 PM
> To: gmclist@list.gmcnet.org
> Subject: Power washing your roof has pros/cons
>
>
> I got annul about the roof not being clean on this 73 that I'm
> reconditioning a few months ago. So I scrub, and power washed it. Kept
> getting dirt out of the channel that is between the roof, and side walls.
> After that time we didn't get much rain. Then as more rain moved in later.
> The leaks started to appear. I didn't associate the two till last week. So
> I caulked the area from the back of the door to the front. The leak above
> the door stopped. Then this morning after a night of rain. I found more
> small leaks. So it seems that I just rearranged some of the water
> contaminated dirt. So I think that it's best to do more power washing that
> seam. Get as much of that remaining wet dirt out. Thus reducing the future
> water/dirt from corroding the aluminum roof. Plus stop the frozen water
> from damaging the channel. Then later in the week. Calk that seam to stop
> further water intrusion in that channel. YES. Power washing caused me a
> problem. But will stop future damage. Bob Dunahugh
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| [GMCnet] Fw: Power washing your roof has pros/cons [message #338374 is a reply to message #338372] |
Mon, 05 November 2018 00:51 |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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Senior Member |
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John. I too used a furnace blower. Secured it to the drivers window. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Monday, November 5, 2018 12:33 AM
To: gmclist@list.gmcnet.org
Subject: RE: Power washing your roof has pros/cons
Jerry. There's just too much risk of breaking the screws off in removal. As I see it. I want to flush out all the dirt I can with the power washer. Let dry for a week or two. Then seal the seam. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Sunday, November 4, 2018 7:05 PM
To: gmclist@list.gmcnet.org
Subject: RE: Power washing your roof has pros/cons
Bruce. I've done the pressurizing the GMC bubble trick. Works great as long as you have the volume. Never thought of using a big leaf blower. I didn't do it this time. At this point. I've only caulked half of the right side. I'm going to do more power washing of what I haven't sealed. I'm thinking that there's more dirt that needs to be cleaned out in that joint. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Sunday, November 4, 2018 1:27 PM
To: gmclist@list.gmcnet.org
Subject: Power washing your roof has pros/cons
I got annul about the roof not being clean on this 73 that I'm reconditioning a few months ago. So I scrub, and power washed it. Kept getting dirt out of the channel that is between the roof, and side walls. After that time we didn't get much rain. Then as more rain moved in later. The leaks started to appear. I didn't associate the two till last week. So I caulked the area from the back of the door to the front. The leak above the door stopped. Then this morning after a night of rain. I found more small leaks. So it seems that I just rearranged some of the water contaminated dirt. So I think that it's best to do more power washing that seam. Get as much of that remaining wet dirt out. Thus reducing the future water/dirt from corroding the aluminum roof. Plus stop the frozen water from damaging the channel. Then later in the week. Calk that seam to stop further water intrusion in that channel. YES. Power washing caused me a problem. But will stop future damage. Bob Dunahugh
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| Re: [GMCnet] Fw: Power washing your roof has pros/cons [message #338407 is a reply to message #338374] |
Tue, 06 November 2018 07:56 |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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Senior Member |
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I would also think that removing the rain gutter extrusion and renewing the sealant between the aluminum top and sides is the proper way to seal leaks, but the screws are definitely a concern after being in place for over 40 years. I wondered if painting the roof with a product like Flex Seal would seal the leaks and hold up?
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: [GMCnet] Power washing your roof has pros/cons [message #338410 is a reply to message #338350] |
Tue, 06 November 2018 08:42 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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George, if (Or when) some of the screws break off - and they will, simply drill another hole and use a new screw.
--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] Fw: Power washing your roof has pros/cons [message #338411 is a reply to message #338407] |
Tue, 06 November 2018 08:50 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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I have removed some of those extrusions. Not a simple job. It bends the
heck out of the extrusions, and they are not readily available. So, next
best thing is cleaning, stripping, straightening the ones that were
removed. Most of the screw holes are damaged during the process as well.
Not saying that it cannot be done, it is just a royal pain in the butt. The
whole idea when you are finished is to have an attractive, leak free
repair. 'Rotts a ruck'.
Jim Hupy
Salem, Or
On Tue, Nov 6, 2018, 6:04 AM George Rudawsky wrote:
> I would also think that removing the rain gutter extrusion and renewing
> the sealant between the aluminum top and sides is the proper way to seal
> leaks, but the screws are definitely a concern after being in place for
> over 40 years. I wondered if painting the roof with a product like Flex
> Seal
> would seal the leaks and hold up?
> --
> George Rudawsky
> Chicago, IL
> 75 Palm Beach
>
> _______________________________________________
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> Unsubscribe or Change List Options:
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