Existing tile surfaces with HSK Renodeco decorative elements

Hi,

does anyone here have experience with the HSK Renodeco and know the prices?

We have the following situation at home: We had a house built in 2013, timber frame construction, interior walls made of KVH studs on both sides sheathed with 12 mm OSB and 12 mm gypsum board, so far so good.

Last year water penetrated the walls through the shower on the upper floor, causing tiles to come loose on the ground floor and parts of the wall had to be replaced both upstairs and downstairs. The first shower was not professionally installed by the expert; the shower tray was installed first and only sealed with a silicone joint (so no waterproofing between the shower tray and wall using a sealing tape, for example, so the coating/rubber membrane applied to the gypsum board ended with the shower tray) both the silicone joint from the installation of the shower tray as well as the silicone joint in front of the tiles cracked, probably because the shower tray stood on an adjustment frame which in turn stood on wooden blocks to compensate for a height of 20 cm, that was probably too unstable, especially since it was an acrylic shower tray and especially when showering with two people or the children shower with you, there was too much movement and weight on the shower tray. Thus water ran through the leaking silicone joint of the tiles and could no longer be stopped by the leaking silicone joint of the shower tray behind it and hit bare uncoated gypsum board, wetting the wall and seeping down to the ground floor where the tiles in the guest bathroom came loose.

Afterwards, we got a new shower, the wall construction had to be replaced, etc., the insurance paid, all good but annoying.

Then after a few months it started dripping again downstairs, this time directly from the visible wooden plank ceiling on the ground floor below the shower. It was then found that the tile grout between the newly tiled lower part and the older tiles above was cracked; the grout was then removed and replaced with a silicone joint.

Now after a few months it is dripping again, same spot. Yesterday someone was here and we saw that the joints of the old tiles show various fine cracks, some up to 50 cm long.

In his opinion, this will never be solved because the wooden construction behind moves too much. Which surprised me, because he could have guessed that back then if it was known that problems occur with such constructions. Then maybe they wouldn't have tiled the wet room at all. (By the way, I also now know that in a wet room you actually shouldn’t use moisture-resistant gypsum boards but boards on a cement basis).

His suggestion is 3 mm aluminum composite panels from HSK Renodeco glued onto the existing tiled surface, seamless (large format panels). This would be a safe and neat solution, yes I agree with him. But if so, all tiled surfaces would have to be covered with HSK Renodeco to have a consistent overall look, 15 sqm 4800 euros *uff*

Now the question to the group, what do you think? Has anyone already done something with the aluminum composite panels or had similar problems? Are there other options that could be used? Ok, one could remove and redo the joints every year, probably cheaper in the long run but more effort...

Attached are some photos of the first damage/dripping water of the second damage and a photo of a grout crack.

How can it be that the walls move so much? Your whole house must look like that with cracks in the walls... Maybe the wet room panels were not staggered when screwed onto the OSB boards? Could it be that you have a fundamental problem with the installation of the shower or the preliminary treatment of the walls? You can easily install "Rigips" in the bathroom if it is done properly. It is just as good as plaster or other panels. Why, for example, were the walls not provided with a sealing membrane, then the walls are completely secure to begin with. For the shower tray, there are installation frames with an integrated drain, where water collects in an emergency and drains away normally.

I have no idea. I only know that the walls were coated for the first time with a green latex membrane in a 2-layer process, the already renovated area was treated with a different coating, including sealing tapes in the edge and corner areas, a wide sealing tape between the shower tray and the wall.

I am surprised anyway that the water finds its way to the floorboards, because actually it should hit the sealed drywall despite the cracked joints, run down along it and reach the sealed shower tray and be stopped at the latest there, but somehow it finds a way past it... My first assumption was that the shower drain is not positioned correctly, but that is okay (because the drops seen from the ground floor are rather in the middle and not towards the wall).

If I had known that we would have so many problems, I would have installed a completely closed shower enclosure (basically a shower in one piece like a phone booth), there are only connections for the water and one connection for the drain.