Hi, I recently started renovating a dining room, the parquet floor had been covered with a carpet for years and I was looking forward to sanding and re-finishing it.
Once I'd lifted the the carpet a few spots of the floor had a loose sound when knocking on it but there wasn't much movement in the boards themselves. Neverless curiosity got the better of me, I tried to prize out a couple of loose bricks and must have gotten carried away...before I knew it I'd lifted the whole floor (bar the border blocks which are solid). Fast forward a few weeks of scraping the bitumen off the back of the blocks, today I got to giving the sub floor a bit of a scrap to remove any substantial bitumen remnants on there.
I had noticed that in one small spot the concrete sounded a bit blown, it felt solid but definitely sounded suspect. I gave it a couple of light whacks with the unfriendlier end of a crowbar and the concrete has definitely failed. I really want to avoid having to re-slab the whole floor.
- If I remove the dodgy area of concrete (I don't think it's particularly thick) can I patch with a cement based product?
- I was thinking of a flexible tile adhesive, or am I better with a bag of readymix concrete? Would I need to prime any of the edges of the concrete prior to patching?
- The area is no more that 2'x1', I think the bitumen must have been acting as a DPM too, I've got a big tub of Sika 5500s and a bottle of Sika Rapid DPM. Is the correct process to patch level and then paint on the DPM?
Pics below with offending area highlighted. The pictures don't seem it, but the floor is very dry.
Once I'd lifted the the carpet a few spots of the floor had a loose sound when knocking on it but there wasn't much movement in the boards themselves. Neverless curiosity got the better of me, I tried to prize out a couple of loose bricks and must have gotten carried away...before I knew it I'd lifted the whole floor (bar the border blocks which are solid). Fast forward a few weeks of scraping the bitumen off the back of the blocks, today I got to giving the sub floor a bit of a scrap to remove any substantial bitumen remnants on there.
I had noticed that in one small spot the concrete sounded a bit blown, it felt solid but definitely sounded suspect. I gave it a couple of light whacks with the unfriendlier end of a crowbar and the concrete has definitely failed. I really want to avoid having to re-slab the whole floor.
- If I remove the dodgy area of concrete (I don't think it's particularly thick) can I patch with a cement based product?
- I was thinking of a flexible tile adhesive, or am I better with a bag of readymix concrete? Would I need to prime any of the edges of the concrete prior to patching?
- The area is no more that 2'x1', I think the bitumen must have been acting as a DPM too, I've got a big tub of Sika 5500s and a bottle of Sika Rapid DPM. Is the correct process to patch level and then paint on the DPM?
Pics below with offending area highlighted. The pictures don't seem it, but the floor is very dry.
