roof water leak

[amigomillers]

We have a non-slide 2001 royale. There is a water leak which presents itself in the window treatments behind the drivers seat and back to the galley. We have resealed the horizontal seam on the roof on that side, but after the last rain, the window treatments were soaked again. We would appreciate all suggestions. He cannot SEE where the water is coming from. Thanks

[Gil_J]

Water leaks can be one of the hardest things to find. Prevost uses a huge high volume blower to pressurize the coach. Then they do the soapy water treatment to any potential leak area. If you have Prevost OTR air it's possible to create enough pressure to do the same.

Based on where the leak comes into the coach, the orgin can be anywhere on that half of the coach. Basically, anywhere that gravity could lead the water to where it's visible. This could include the seams and rivets of the front and rear caps. It could be from the roof air gaskets, if you have roof air. Any roof penetration on that side of the coach has to be suspect.

If the leak wasn't limited when it rains, the roof air drains can also be the source.

Sometimes it can help to have an inspection camera. They have a camera on a flexible shaft that's a couple feet long. It may be possible to get it into the ceiling through vents or lighting housing and find the water trail.

[Joe Camper]

If u have OTR A/C there is a simple way to pressurize the bus to soap up seams to check for leaks. Just open the bay door for the evaporator on the drivers side while the ac is on. Its that simple. Insead of the 2 blowers in there recuirculating the air they pressurize the cabin with a huge amount of outside air.

[rickdesilva]

Try the marker light over the driver window.

[dale farley]

I wonder how much air pressure/volume you actually need to locate a leak by pressurizing the inside of the bus and using soap to find the leak? I tired it one time with a large vacuum cleaner (using the output of the air), and that didn't work.

[Gil_J]

Dale,

It takes a lot. You have to overcome the natural leaks and then have enough pressure to pressurized the leaks, many of which can be real small. It's important to seal all natural vents, like the fresh air intake for the dash air. I know the blower that Prevost uses is huge!

[JIM KELLER]

We have a non-slide 2001 royale. There is a water leak which presents itself in the window treatments behind the drivers seat and back to the galley. We have resealed the horizontal seam on the roof on that side, but after the last rain, the window treatments were soaked again. We would appreciate all suggestions. He cannot SEE where the water is coming from. Thanks

Any update on this Post ? Resolutions of problems help all Members.

[dale farley]

Thanks Joe. I'll start watching for a blower unit.

[Mikee]

You may want to check the awning mounts for being loose. I have found several where the awning mounts were the issue.

Mikee

[JIM KELLER]

AMIGOMILLERS, Keep us updated on this water leak so we can all learn and help each other.