Hello, the cottage we are renovating is built on a high wall, so there is a very spacious crawl space. The problem we've noticed is that below one of the rooms, the boards holding the floor insulation have fallen to the ground. The floor insulation is sawdust. When opening up the floor, should we shovel away as much sawdust as possible, or can we leave it on the ground as a sort of "ground insulation"? The room is being renovated anyway. It has probably been like this for at least 10-20 years already, and there is no visible mold growth on the timber. The reason the boards the insulation was on have fallen is because they are thin particle boards that had only about 1cm support on each side, so it's not surprising they bent over time and fell.
I would have replaced "the boards that hold the floor insulation" with k-plywood, which I cut to fit the space between the floor joists. Alternatively, used trossbottenskivor.
And sealed with outdoors caulk around the board edges to prevent drafts and air leaks.
But first, of course, shoveled away/removed the sawdust and other organic material from the ground.
There should be nothing organic that can allow mold and other growth.
And sealed with outdoors caulk around the board edges to prevent drafts and air leaks.
But first, of course, shoveled away/removed the sawdust and other organic material from the ground.
There should be nothing organic that can allow mold and other growth.