We are building a laundry room (3.6 x 3.5 m) and a utility room (1.8 x 3.6 m) in a barn. The framing is cc30 and there is a form plywood as a subfloor. We are encapsulating the compartments in plastic and filling them with Finja EPS concrete up to the top of the joists. After pouring the EPS, we will lay reinforcements (5 mm), attach underfloor heating pipes 12 or 16 mm and then self-level with Finja 360 Fiber. Looking at their floor constructions, the leveling should be > 20 mm even over the heating pipes. The minimum leveling height will then be 5 + 12/16 + 20 = 37 or 52 mm, which feels very high so I am considering milling the EPS and embedding the heating pipes to lower the leveling height, even though I know it will create a lot of dust. Here are some considerations before the pouring:
- Should the floor drains (Purus Brage 75) be level with the joists?
- If the drains are set level with the joists, do I need a different self-leveling compound around the drains or can I use Finja 360 for everything even if it will be a thinner layer around the drains themselves?
- Is it required to screw on a mounting plate or a floor drain fixture to fix the drain in place, or is it enough to fix the drain in place with EPS concrete and self-leveling compound?
- Under the subfloor is a crawl space that is about 30–50 cm high. The drainage pipes are propped up with stones at the points where the pipes descend from each drain. Is this sufficient in combination with mounting strips according to the picture?
