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JimK-NY's avatar
JimK-NY
Explorer II
May 05, 2017

Leaks and Water Damage Checklist

It seems someone is always finding a leak and water damage. Then there are the threads where someone spends hundreds of hours rebuilding an old camper. Once the skin comes of the unit, it seems there are leaks and rot everywhere.

I have tried to be very proactive in maintaining the caulking on my camper but I have still had issues. At this point I am starting to become paranoid. I thought it might be helpful for all of us to have a checklist of areas to check that goes beyond the big and obvious caulk seals around roof fans, vents and skylights. I have three items for the checklist.

1. Running lights. I put this on the list because it seems leaks here are frequent and not easy to detect until the damage is extensive. Does anyone have a good solution? I have globs of caulk around the sides of mine.

2. Front windows. I had a pinhole leak around one of the windows. Unfortunately it occurred while I was traveling. I tried twice to seal the leak with big ugly globs of caulk. After two failures, I sealed around each window with gorilla duct tape. At the end of my trip, I stripped all the chalk and did a final repair.

3. Happijack electrical connections. On my Northstar they installed the rear connectors upside down because the wires were not long enough to enter on the bottom side. Eventually the caulk around the electrical wire developed a leak. Water ran down the wire, entered the connector and slowly wet the entire lower right corner of the camper. The damage apparently occurred throughout winter storage. By Spring I had to replace all the wood in that corner. Even the jack was in danger of pulling away from the camper. The leaking area was literally a pinhole.

Are there other areas that are likely to be overlooked?

Thanks, Jim

23 Replies

  • deltabravo, thanks for your help with spelling.

    kohldad, I certainly understand what you mean about primary seals. Unfortunately it seems that manufacturers don't always understand the need. From what I can tell there was no primary seal between my front windows and the camper skin. Nothing but an outer layer of caulk. The running lights have no primary seals or gaskets. If water enters the cover will fill and the water will enter through the holes cut for the wires. I am not sure how to fix this. I would like to start by sealing the holes.
  • 2. Front windows. I had a pinhole leak around one of the windows. Unfortunately it occurred while I was traveling. I tried twice to seal the leak with big ugly globs of chalk. After two failures, I sealed around each window with gorilla duct tape. At the end of my trip, I stripped all the chalk and did a final repair.


    Caulking is really a secondary seal. The primary seal is the putty tape under the item being sealed.

    It is usually a poor primary seal that eventually causes the problem. The only real way to rectify the true problem is to remove the item in question, properly seal and then apply a new secondary seal.

    A lot of times with windows, it is installer lazyness/production speed that doesn't get the window centered to maximize the primary seal around the perimeter. My father once removed a window that had a leak and the problem was the window was set in place and shoved to one side. This caused there to be almost no overlap of the window and the framing on one side and the top. By taking a couple minutes to shim the window so it was centered in the opening, he achieved a minimum of 1/2" overlap for a decent primary seal.

    In regards to your question of checklist, it's very simple. If it isn't a single piece of material, it is subject to a leak.