I apologize for taking this in English. Please feel free to reply in Swedish if you wish.
I am renovating a room in my "vinden". A 1970s house built of cement that had vinden "inredd" in 1973. I am removing 2 inner walls in this room that made up a badly designed closet. I have removed the walls, and found the "syll" ("sill" in English) is set in some very soft and crumbly cement that was poured on top of the structural betong that the house was built of. The sill sticks out from the floor too high, so I had to remove it so the flooring can be laid on an even surface. In doing so, I now have an empty space in the floor, with some parts that have crumbled away a few centimeters. Under the smooth surface, the material seems very loose.
The room is about 4.5 m x 4 m, and in one corner there is now an L-shaped trough ("sluss") that is 8 cm wide and 5 cm deep. One side is 1.5 m long and one side is 1 m long.
It seems that I could simply lay some masonite subflooring and then some parkett on top. I can't imagine what sort of problem might come from that.
Alternatively, can someone suggest a product to fill in this space with (one that can be bought in small quantities, I hope.)
(NB, I had it inspected when I purchased it, and there is no sign of "fuktskada", so that is not an issue).
