ᐅ Water damage. Possible puncture of the underfloor heating system?

Created on: 5 Feb 2017 17:16
U
uwe81
Hello!

We moved into our new single-family house nearly two years ago. Last late summer, the laminate flooring in the hallway in front of the bathroom started to warp. At first, I thought, “Oh no, since I installed it myself, maybe I didn’t leave enough expansion gaps, and now it’s expanding due to the heat.” Now the problem has appeared again, much worse this time, so I wanted to repair it. That’s when I noticed that the entire screed is wet.

We see about 1 square meter (about 11 square feet) of wet screed in front of the bathroom door. Of course, I don’t know how wet it is under the bathroom tiles. Since we are still under warranty, the question for me is who is responsible…

I installed the floor (click laminate) myself. Unfortunately, I screwed the transition profile to the bathroom floor, which means I drilled into it (yes, I know now that was a bad idea—I had a bad feeling back then but relied on advice from the hardware store). So it’s possible that I damaged the underfloor heating. I tried not to drill too deep (the anchors are 3cm (1.2 inches) long) and used a depth stop while drilling.

My main question is: If it came from the underfloor heating, shouldn’t a significant pressure drop be measurable in the heating system? I have never refilled water. The last maintenance was last spring. The chimney sweep in autumn definitely wouldn’t have refilled anything either. We currently still have just under 1.5 bar (about 22 psi) pressure shown on the heating gauge in the basement, although the leak would be on the upper floor, about 6 meters (about 20 feet) higher.

The builder and my insurance have already been informed.
* Could this come from the underfloor heating, and if so, how can I find out?
* If yes, what steps would be necessary for repair (this is probably guesswork without inspecting the damage), and what kind of costs might be involved (my estimate is several thousand)?
* Would a good insurance policy typically cover this kind of damage (we have comprehensive coverage with Debeka)?

Thanks a lot for any advice,
Uwe
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Nordlys
5 Feb 2017 20:09
Just... report it to the insurance tomorrow as well. Duty to mitigate damages. They should tell you what needs to be done immediately!
Y
ypg
5 Feb 2017 20:15
Upper floor or ground floor? Is there an exterior wall?

Wishing you good luck in finding the cause! Hopefully, you locate the leak.

Best regards
U
uwe81
5 Feb 2017 20:21
The damage is on the upper floor, but not near an exterior wall.
I have uploaded some photos. The laminate was completely soaked in that spot.

Floor with blue protective fleece, adjoining wooden floor in two rooms, red line marks the edge of the foil.


Untreated floor in renovation room: screed with stains, blue protective foil at the front
Y
ypg
5 Feb 2017 20:34
Washer fluid?!

Regards
Y
ypg
5 Feb 2017 20:36
Is this type of membrane common? I’m not familiar with using it inside the house...

Regards
U
uwe81
5 Feb 2017 20:54
Hello! The film is installed as a vapor barrier beneath the laminate flooring.
I consider the presence of wipe water practically impossible. In significant amounts? Then it would have to pass through both the laminate and the vapor barrier.