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Old 05-06-2017, 04:36 PM   #1
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Join Date: Sep 2016
Location: SE Michigan
Posts: 2,024
Blower door test

Something that I've never seen mentioned on here is a blower door test to find out where your water ingress leaks are.

Interestingly Camping World has the equipment to do the test, it's called a Seal Tite System test but from what I read on in here, most CW's either don't want to do it or lack the knowledge to do it.

Pretty simple really...

You'll need either a large shop vacuum or a leaf blower, some cardboard and duct tape to seal the cardboard to the leaf blower or vacuum cleaner hose, a sprayer of soapy water solution and some of your time..a ladder to get on the roof as well...

The following applies to every RV from a motor Home to an A frame and truck campers too.

Want to know where you leaks are. Pretty simple actually. You have to pressurize the interior of the unit and the pressurized air will show up on the outside everywhere the caulking or sealants have been compromised. Expect leaks around the windows and external speakers but what you are looking for are leaks around the clearance lights, roof seams and especially around the front of the unit, where driving in the rain, drives the water under the skin and into your unit, eventually rotting it...

You don't need to try to inflate your RV, moderate pressure but continual pressure inside is required.

Open a window and cut the cardboard to fit and use duct tape and tape it into the opening. Attach your leaf blower or shop vac (blow side) into the cardboard.

Close all the roof vents, the entrance doors, close your range hood vent and retract the slides. Turn on the blower and exit the unit.

Then get your sprayer with the soapy water and start on the roof, wetting down each seam and corner extrusion. Whever there is a leak, the solution will bubble. Mark it as you go, every one, especially around the front of the unit and all the vertical seams. Everywhere there are bubbles, the caulk is failed.

Roof vents will leak, so will outside showers and battery and propane compartments. What you are looking for is compromised sealant. Like I said, mark every one with a grease pencil and when you are done, go back and seal all those leaks.

That will eliminate water intrusion, at least for 6 months or so. I recommend doing it every season. Easiest way to find those leaks that will eventually ruin your investment.

You paid a lot of money for it. why surrender the unit to rot when you can be proactive and insure your unit lasts a long time...
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