ᐅ Patio Slabs on EPDM Waterproofing – Alternative to Pedestal Supports
Created on: 7 Oct 2020 17:49
M
Matt123
Hello everyone,
a few months ago, we renovated our balcony (6m wide, 2.5m deep, but diamond-shaped).
It was leaking and sloped towards the house, among other issues.
So, we installed a sloped screed.
On top of that, we built the following layers:
EPDM membrane
Protection mat pads
Spacer pads for decking (about 1-2 cm (0.4-0.8 inches) high and flat)
Porcelain stoneware tiles, 60x60x2 cm (24x24x0.8 inches)
Unfortunately, I am not satisfied with the result.
The screed wasn’t perfectly level, so the spacer pads only partly have room to adjust.
This means some tiles are a bit loose.
Especially around the edges, I haven’t dared to firmly fix the small edge pieces yet (with cement mortar or XPS insulation or something similar).
Since we don’t have a framing around the tiles like on a terrace (because we have a railing that is screwed on from the side), this makes things a bit more complicated, although with the protection mats so far I haven’t noticed any sliding of the tiles towards the railing.
In any case, I wanted to ask if there are alternatives above the EPDM membrane for the construction that might be more stable?
I had considered laying out a full-surface protection mat and glueing the tiles on top of it. That way, the tiles could still “slide” on the EPDM membrane but would be connected to each other somehow.
Or do you maybe have another idea?
I have attached a photo from when I was laying the tiles, which I think shows the setup.
Best regards,
Mike
a few months ago, we renovated our balcony (6m wide, 2.5m deep, but diamond-shaped).
It was leaking and sloped towards the house, among other issues.
So, we installed a sloped screed.
On top of that, we built the following layers:
EPDM membrane
Protection mat pads
Spacer pads for decking (about 1-2 cm (0.4-0.8 inches) high and flat)
Porcelain stoneware tiles, 60x60x2 cm (24x24x0.8 inches)
Unfortunately, I am not satisfied with the result.
The screed wasn’t perfectly level, so the spacer pads only partly have room to adjust.
This means some tiles are a bit loose.
Especially around the edges, I haven’t dared to firmly fix the small edge pieces yet (with cement mortar or XPS insulation or something similar).
Since we don’t have a framing around the tiles like on a terrace (because we have a railing that is screwed on from the side), this makes things a bit more complicated, although with the protection mats so far I haven’t noticed any sliding of the tiles towards the railing.
In any case, I wanted to ask if there are alternatives above the EPDM membrane for the construction that might be more stable?
I had considered laying out a full-surface protection mat and glueing the tiles on top of it. That way, the tiles could still “slide” on the EPDM membrane but would be connected to each other somehow.
Or do you maybe have another idea?
I have attached a photo from when I was laying the tiles, which I think shows the setup.
Best regards,
Mike
I wasn’t aware that the panel supports are adjustable.
However, they definitely shouldn’t wobble, no matter how uneven the floor is. If you’ve stretched a string and leveled the height, please be very precise with this.
To finish, install an L-profile along the edge. Ideally, it should have been placed under the screed beforehand. Now, if you drill and water gets in during winter, it might cause spacing issues. Maybe it can be glued.
However, they definitely shouldn’t wobble, no matter how uneven the floor is. If you’ve stretched a string and leveled the height, please be very precise with this.
To finish, install an L-profile along the edge. Ideally, it should have been placed under the screed beforehand. Now, if you drill and water gets in during winter, it might cause spacing issues. Maybe it can be glued.