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Old 08-22-2013, 07:14 AM   #1
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Pressurizing my cabin

I have a roof leak that I cannot pinpoint. I have read about dealers that can pressurize the trailer, cover the exterior with soap bubbles and find the leak. Do you guys and gals think that I could get enough volume with a leaf blower to accomplish this ? Presently the furnace is out of the trailer. I thought I could induce the pressurized air though the vent opening in the shell at the furnace location. Yes, no, options ?
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Old 08-22-2013, 07:24 AM   #2
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I don't have the science to back this up, but my guess is no. Leaf blowers look like they work on high speed, low volume. You need exactly the opposite.

I've previously considered renting a commercial carpet dryer/blower to do something like this.

Good luck and post some pics if you try.
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Old 08-22-2013, 07:26 AM   #3
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What kind of leaf blower?

If you rig a panel to attach you can pressurize...Open all windows and roof vents, start blower, throttle if possible, then start closing vents first then windows. This way you gradually build air pressure.

You don't need a lot of pressure to find leaks with soapy water...

Let us know how it goes. Take pics?

Oh, exhaust of shop vac may also work if it is smaller than leaf blower.
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Old 08-22-2013, 08:02 AM   #4
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There was a thread a while back where some did this with a leaf blower. He had pictures and details. So if you search the forum you may find it. Good Luck.
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Old 08-22-2013, 08:45 AM   #5
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Yes it will work with a leaf blower. Leaf blowers are low pressure high volume fans. You got to figure how to seal it up. The larger gas powered ones are best.

Perry
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Old 08-22-2013, 09:41 AM   #6
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Quote:
Originally Posted by baylito99 View Post
I have a roof leak that I cannot pinpoint. I have read about dealers that can pressurize the trailer, cover the exterior with soap bubbles and find the leak. Do you guys and gals think that I could get enough volume with a leaf blower to accomplish this ? Presently the furnace is out of the trailer. I thought I could induce the pressurized air though the vent opening in the shell at the furnace location. Yes, no, options ?
I had this done at a dealer and they didn't find the leak. There are several facts to consider:

1) There's probably a dealer near you that will do this for you for around $100-$150.

2) This doesn't work for all leaks because there are some components of the trailer that are vented by design, like clearance lights, and there are some parts of the trailer that are inaccessible to the bubble solution, like the area under the air conditioner (Guess where my two major leaks were).

3) The main value, IMO, of a sealtech or equivalent test is that you can use it to rule out some things that look questionable visually. In my case I had a doubtful-looking sewer vent that turned out to be OK, probably because it's properly bedded in sealant so the surface cracking on it doesn't make much difference.
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Old 08-22-2013, 10:07 AM   #7
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Thumbs up

Soldiermedic here on the forums offers that service, he has been active at some of the Rallies. Send him a PM I'm sure he could answer your questions.

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Old 08-22-2013, 12:21 PM   #8
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Are you sure it is coming from the roof? Leaks are hard to pinpoint because the water travels between the skins and usually ends up in the floor.

Perry

Quote:
Originally Posted by baylito99 View Post
I have a roof leak that I cannot pinpoint. I have read about dealers that can pressurize the trailer, cover the exterior with soap bubbles and find the leak. Do you guys and gals think that I could get enough volume with a leaf blower to accomplish this ? Presently the furnace is out of the trailer. I thought I could induce the pressurized air though the vent opening in the shell at the furnace location. Yes, no, options ?
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Old 08-22-2013, 06:57 PM   #9
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Thanks for the info so far.Don't have an rv dealer near by that has any equipment for this. Yes I'm sure the leak is on the roof. I paid JC $125 to recaulk over my caulking on the roof vent, guess what it leaked before I left their shop. It leaks sitting in the driveway when we get a substantial rainfall. It first shows up inside just below the vista view window, sometimes roadside sometimes curbside. It depends on how level the trailer is sitting side to side. There is a roof vent and tv antenna above where the leak shows up, both have been cleaned down to the roof skin and recaulked. The water hose test showed nothing, I guess it takes some time for the water to migrate in.
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Old 08-22-2013, 09:14 PM   #10
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Vista view windows are known for leaks. Always remove old caulk before applying new caulk. It takes time for the insulation to get soaked before water leaks can be seen.

Perry
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Old 08-22-2013, 09:33 PM   #11
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Once a person identifies a leak, reverse pressure to pull acryl into seam?
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