Van Conversion Roof Water Leak Fix

We have a water leak in our van! We show you how to diagnose and fix a van water leak.
Van Conversion Roof Water Leak Fix

We sealed our side trims a few months ago, but we didn’t bother to do the front sections of the van…and of course, we now have a leak. But after sealing it up, that still didn’t solve the leak, so we dug deeper and found something quite interesting…

1. IDENTIFY POINT OF ENTRY

We knew our leak was coming from the front of the van, around the driver’s seat area. We remembered we had not sealed all the side trim pieces on the front doors, so thought that might be the culprit. 💦

roof van leak fix

2. SEAL THE BITS WE FORGOT

We pulled off the front side trim that we hadn’t sealed with neutral cure sealant, and sealed all the plastic plugs up, and left to dry for a few days, to see if that would solve the leakage problem.

Newsflash, it did nothing. 🙃

roof van leak fix

3. RUN MORE DIAGNOSTICS

  • Diagnostic test 1: Remove plastic side piece which held the seat belt, look for wet patch.
  • Result: No water found.

  • Diagnostic test 2: Use hose to spray outside of van to find point of entry. 
  • Result: Inconclusive. No entry point found.

  • Diagnostic test 3: Unbolt more plastic from van. Remove the driver’s door step and flooring. Look for water.
  • Result: Water found!
roof van leak fix

top tip

It’s probably best to do this every 6 months or so, there are drain holes all over the van reachable from underneath. If you don’t water can sit in there and eventually rust it’s way through your van.

4. UNPLUG THE DRAIN HOLES

After uncovering a mini lake under the footwell, we unclogged the drain holes and let the water flow out by poking a small flathead screwdriver into the holes. 

roof van leak fix

5. FINAL CHECKS

Once all the water had drained and we cleaned the area, it was clear that this water still might not have been the culprit since it was very low from the floor’s actual height.

We checked the door seals under the driver’s seat and the roof ribs and could not find any conclusive evidence of water anywhere.

Our best guess is that the water in the footwell sloshed around and got high enough as we were driving to leak up into the living space.

roof van leak fix

future follow up

After several months we have not had any more problems with a leak here. It could have been from the puddle we found in the footwell or a leaky door seal that fixed itself. While it was good to clean out the drain holes and to know that water can collect there, we are unsure whether we fixed the leak, it fixed itself, or it was something residual.

quick look

  1. Seal side trim remainder
  2. Remove plastic panels
  3. Unclog drain holes
  4. Somehow it stopped leaking

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December 30, 2023

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