Forum Discussion

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
  • I ran a leak test. My leaf blower is industrial sized so I did not want to try to use it. I used my shop vac instead. It puts out a very stiff blast of air. In fact on the first try it blow out my cardboard and tape seal.

    I found no unexpected leaks. The soap did bubble where I expected. My skylight does not have a seal. Instead it uses a 4 inch lip to prevent water entry. I got big bubbles around the skylight. I had a small bubble at the back door but only in the area of the lock. I also had large bubbles around the hatch for the outside shower. There is no seal on the hatch cover and the hoses need to move freely. I also got small bubbles around the vent flap for the stove exhaust. I would say the leak testing worked and even better I found no leaks.
  • Sounds like you are ahead of the game at this point but not an excuse for not staying after the caulking.
  • Here is a video that helps with finding delamination and leaks.
    https://www.youtube.com/watch?v=8NuO9U63lIM