ᐅ Filling a hole in an interior wall with XPS insulation boards?
Created on: 22 Sep 2025 09:45
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Michel56
Hello,
since the gutter in the cavity wall has been more or less leaking for years, I would now like to move it completely outside in front of the brickwork. The insulation will be replaced because it is wet.
There are tiles on the terrace, which I also want to extend over the cavity wall (old gutter) into the new gutter. My idea was to glue XPS boards inside the cavity wall and apply a waterproofing slurry on top, possibly followed by screed, tile adhesive, and tiles. Or what would you suggest?
since the gutter in the cavity wall has been more or less leaking for years, I would now like to move it completely outside in front of the brickwork. The insulation will be replaced because it is wet.
There are tiles on the terrace, which I also want to extend over the cavity wall (old gutter) into the new gutter. My idea was to glue XPS boards inside the cavity wall and apply a waterproofing slurry on top, possibly followed by screed, tile adhesive, and tiles. Or what would you suggest?
Tolentino schrieb:
🤨
Unfortunately, it’s becoming more and more unclear. We need photos—of the overall situation, not close-up shots of the gutter.
Perhaps also schematic drawings from above and the side, including dimensions and a site plan. Should I now take a photo into a hole? As shown in the picture, there is a tiled terrace on one side and on the other side currently an angle where the brickwork is protected from rain. Next to it, it goes down 1.30 meters (4 feet 3 inches).
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chand198623 Sep 2025 06:16The photo shows a close-up of an Aco Drain channel.
There is also a text about a double-wall structure, a terrace, a hole, and a gutter.
Who is supposed to make sense of this?
- WHERE is the Aco Drain channel located? On the wall? In front of the wall?
- WHERE exactly is the mentioned hole?
- WHERE does the water flow due to the leak?
- WHERE exactly are the tiles supposed to be installed?
- WHERE is the gutter supposed to go?
No one here can read your mind. That’s why a picture is worth a thousand words—especially if it helps answer the above questions.
There is also a text about a double-wall structure, a terrace, a hole, and a gutter.
Who is supposed to make sense of this?
- WHERE is the Aco Drain channel located? On the wall? In front of the wall?
- WHERE exactly is the mentioned hole?
- WHERE does the water flow due to the leak?
- WHERE exactly are the tiles supposed to be installed?
- WHERE is the gutter supposed to go?
No one here can read your mind. That’s why a picture is worth a thousand words—especially if it helps answer the above questions.
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nordanney23 Sep 2025 07:29Michel56 schrieb:
as shown in the picture,… you took a close-up shot of the resting stage. Neither a terrace, wall, nor brickwork is visible.chand1986 schrieb:
The photo shows a close-up of an Aco Drain channel.
There is also a text about a double-walled wall, a terrace, a hole, and a gutter.
Who is supposed to make sense of this?
- WHERE is the pictured Aco Drain channel located? On the wall? In front of the wall?
- WHERE is the mentioned hole?
- WHERE does the water flow due to the leak?
- EXACTLY WHERE are the tiles supposed to be laid?
- WHERE is the gutter supposed to go?
No one here can read your mind. That’s why a picture is worth a thousand words—if it helps answer the above questions. It really doesn’t matter where the Aco Drain channel is located or where the water runs off. The channel and drain come out of the double-walled masonry, and the drainage system will be completely rebuilt. In other words, a gutter will be installed in front of the brickwork, and tiles will be installed on top. The only question is how to properly build up the structure when the top of a double-walled masonry is sealed.
Michel56 schrieb:
It doesn't matter at all where the AcoDrain channel is located or where it drains to. The channel and drain come out from the double-layer masonry wall, and the drainage will be completely rebuilt. You asked for help, and from just an image of a channel, it’s hard to imagine the rest based only on a verbal description. Meaningful assistance can only be provided if the situation is clearly understood.
It’s not just one user requesting more visual information, so it can’t be completely unimportant.
Otherwise, my advice is to get a suitable professional to come to your home.
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chand198623 Sep 2025 15:39Michel56 schrieb:
It doesn’t matter at all where the AcoDrain channel is located or where it drains. If it really doesn’t matter, then why are you sending us a photo of it?
Better show us the things that actually do matter!
Do you want to cover the wall coping with sloped tiles, placing the gutter on the lower side of the slope?
Does the space between the walls mean the gap with the hole?
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