Slope direction of terrace slabs

Hi everyone,

a brief introduction about me and my project. Our new building is completed and I want to start with the outdoor area. Since I have helped a few times laying terrace slabs or paving a driveway and am also handy in general (I like to claim that, I am a trained electrician), I want to finish my terrace myself. We have already chosen edge stones and terrace slabs (60x60x2 ceramic). The terrace slabs should lie on 30-40cm of well-compacted mineral mixture and a maximum of 5cm of fine gravel. I want to firmly joint everything with a drainage-capable material. I have already planned my desired terrace with Google SketchUp. Since our terrace does not correspond to the standard shape (simply 4x4 shape), I am currently puzzling over the slope. I hoped you could maybe give me one or two tips.

About my problem. As you can see, my terrace should consist of two levels because the garage is one step lower than the house. The main terrace should be level with the house and the terrace area by the garage should be level with the garage. For the main terrace it is clear where the slope goes (red arrow). But where should I direct the slope at the terrace in the garage area? As marked with the green arrow into the drainage of the shower? That would mean I would have to make a diagonal cut. (I still don’t understand how @gesmaingrun managed it without that, topic: "Terrace slabs around the corner") With the execution marked by the yellow arrow I would have to place a channel in front of the step. With the execution marked by the blue arrow I don’t know where the water can be led since the neighbor is about 40-50 cm lower. Do you have a sensible or good tip how this is professionally done or solved?

Oh, on the garage level a cleanliness strip will be created along the garage and house wall. Towards the neighbor I wanted to lead the terrace slabs up to the curbstone or angle stone. And the marked pool will be recessed by 50cm.

In the other two pictures I have laid out a 60x60 grid to show how I would lay everything.

Thanks in advance for your time and possible help.

Best regards, Alex

Hm for some reason the images were not attached. Here again.

30-40cm of well-compacted mineral mixture and a maximum of 5cm of crushed stone lie

Attention, maximum 2-3cm of crushed stone for 2cm thick natural stone slabs, otherwise they will wobble.

And crushed stone bedding at the corners



and I would slope it towards the garage since you have a pointed splash guard strip there, provided it is drained.

How is it actually with the boundary construction? Garage+pool are obviously much longer than 9m I assume.

I probably would have spared the recesses at the shower and would have gone down from the house wall to the property boundary with a minimal slope of 1%. Then a channel at the boundary and that's it. The water from the shower would then also drain there.

Tomtom79, First of all, thank you for your tips, especially regarding the laying of the tiles. The gravel strip is not drained. I have a strange feeling about directing water towards the garage or house. danixf, the 9m should not be a problem. The pool is about 2 m from the garage and about 1m from the boundary. The pool is a swim spa that is actually designed to be placed on the terrace like a hot tub. Regarding the slope, is it not a problem if the water flows along the garage wall?

Would a slope from the garage towards the pool with a channel also work? That would cause fewer problems regarding the step and L-shaped stones at the pool.