Had a little thought while I was shoveling out sawdust from a floor structure. As it looks now, the sawdust is right up against the chimney. I'm going to replace part of the structure and put in new insulation, some type of eco-fiber or hemp. What I was considering is that you shouldn't have anything combustible within 210mm or similar from the flue, but if you use leca balls instead of insulation closest to the chimney, you should eliminate the risk of the insulation catching fire.
Or is it a completely crazy idea to use leca about 30cm around the chimney??
Or is it a completely crazy idea to use leca about 30cm around the chimney??
It should be fire-rated insulation. Stone wool is probably the right choice for you. A question, why are you removing the sawdust? Around the chimney, it should be removed, but throughout the entire joist space?
Once upon a time, there was a wall about 2m from the exterior wall, the beams in the floor joist went to that wall but not out to the exterior wall. Someone decided to remove the wall and splice the beams with planks out to the exterior wall, then nailed a solid wooden floor with 5cm thick planks using 7" nails, three per beam and plank, with one nailed obliquely in the groove. Additionally, there were sturdy dowels between the planks. I've always thought the floor was shaky in that room, so I decided one day to lift the planks and check, as well as dismantle a storage or attic or whatever it's called.Träig snickare said:
So now I will replace/reinforce with braced 45x220 between the beams that are left, which is why I've shoveled out the sawdust, along with clay plaster and an old clay ceiling that I found at the bottom. I've also had problems with mice in that room for a long time and found many nests and even more droppings in the sawdust.
Ps The floor didn't survive, the planks cracked when I tried to pry them up, which is a bit of a shame because they were between 20-40cm wide and up to 5m long.
Okay. Good luck.
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