A couple of days ago, I poured a slab of about 2 square meters for a pump house to house equipment and a pump for a deep drilled well. On the slab, there is a floor drain that leads about 2 meters to a dry well as potential leakage and spillage might occur. The problem is that I didn't create a slope towards the floor drain, and now I'm wondering if maybe I could instead cast a raised edge on all corners to prevent future standing water from flowing into the wooden construction? Possibly also use leveling compound to create a slope to the floor drain in the future?
The current construction of the slab:
How I thought I would solve the problem:
How would you solve this in the best way so the concrete, for example, adheres to the already poured section and doesn't crack and fall off? And the outer "wall" of the casting would then just be for aesthetic purposes so that you don't see the foam insulation.
I'm counting on not loading the slab with more than about 400kg. It can be added that this will primarily only be summer water, so I'm not worried about thermal bridges through the concrete.
