I moved into a 1930's house in April and was curious about a rectangle shape showing in the dining room ceiling. I noticed on the original plans that there used to be a chimney breast there so I pulled up the carpet in the bedroom and found a large concrete hearth base.
I pulled up some nearby floorboards to try figure out the depth but the base extends further under the nearby boards, and the other side is covered by a noggin the same height as the joists.
I've read that these things are supposed to be poured into a frame that is built until the joists and shouldn't be too deep, but if that was the case I don't understand why the rectangle shape is showing in the ceiling below.
It's all solid when tapped from below, which i wouldn't expect if it was poured into a timber frame from above, so I'm a bit worried that it's actually one massive concrete block that is sinking into the ceiling and might drop. Can anyone see any other explanation for it?
I pulled up some nearby floorboards to try figure out the depth but the base extends further under the nearby boards, and the other side is covered by a noggin the same height as the joists.
I've read that these things are supposed to be poured into a frame that is built until the joists and shouldn't be too deep, but if that was the case I don't understand why the rectangle shape is showing in the ceiling below.
It's all solid when tapped from below, which i wouldn't expect if it was poured into a timber frame from above, so I'm a bit worried that it's actually one massive concrete block that is sinking into the ceiling and might drop. Can anyone see any other explanation for it?