ᐅ Laying Patio Slabs – Substrate Preparation in the Conservatory?
Created on: 29 Jun 2020 22:50
S
stud_thomasS
stud_thomas29 Jun 2020 22:50Hello everyone,
About 10 years ago, we built a house and had a regular terrace installed with granite slabs. Now we want to replace the granite slabs with wood-look patio tiles measuring 120x40x2cm (47x16x0.8 inches).
A year ago, we converted the terrace into a cold conservatory, so rain or slope (which we don’t have) is not an issue.
I have since checked the base and found the following:
- The top six centimeters (2.4 inches) consist of a mix of sand and cement, but the surface is not very hard (I was able to make a hole easily with a chisel and hammer / it’s rather crumbly).
- Underneath this layer, there should be about 30–40 cm (12–16 inches) of compacted sand (we needed to level the ground around the house, and sand was used for this).
My question is how the foundation should be prepared, considering that the current height definitely needs to be raised by 4 cm (1.6 inches) because the sliding door tracks should be at the same level as the patio tiles.
In general, I want to do the project myself and would really appreciate any tips you could share.
Thank you very much and best regards,
Thomas
About 10 years ago, we built a house and had a regular terrace installed with granite slabs. Now we want to replace the granite slabs with wood-look patio tiles measuring 120x40x2cm (47x16x0.8 inches).
A year ago, we converted the terrace into a cold conservatory, so rain or slope (which we don’t have) is not an issue.
I have since checked the base and found the following:
- The top six centimeters (2.4 inches) consist of a mix of sand and cement, but the surface is not very hard (I was able to make a hole easily with a chisel and hammer / it’s rather crumbly).
- Underneath this layer, there should be about 30–40 cm (12–16 inches) of compacted sand (we needed to level the ground around the house, and sand was used for this).
My question is how the foundation should be prepared, considering that the current height definitely needs to be raised by 4 cm (1.6 inches) because the sliding door tracks should be at the same level as the patio tiles.
In general, I want to do the project myself and would really appreciate any tips you could share.
Thank you very much and best regards,
Thomas
P
pagoni202029 Jun 2020 22:53I would first pour a concrete slab for the terrace and then lay the new paving slabs on top. This helps prevent sinking and unevenness, among other issues. That’s how I did it at a house and found it excellent. Since the area is essentially already prepared, in my opinion, this would be a manageable effort and make the installation easier afterward.
S
stud_thomas30 Jun 2020 23:39Should the old substrate be removed (at least partially)? What material should be used for the "filling"? Drainage mortar, screed concrete, flowing screed, leveling compound...?
H
HilfeHilfe1 Jul 2020 06:29Hi, I mixed fast-setting concrete with decorative gravel for my pool, dampened it, and laid slabs on top. It’s solidly set. Then I installed the tiles.
S
stud_thomas2 Jul 2020 09:40HilfeHilfe schrieb:
Hi, I mixed quick-setting concrete with decorative gravel for my pool, dampened it, and laid the slabs. It is very solid. Then I put the tiles on top.Thanks a lot!
Did you use 2cm (0.8 inch) thick slabs? Did you apply any flexible adhesive or bonding slurry to the slabs?
Similar topics