richo106 Posted May 16, 2022 Share Posted May 16, 2022 (edited) Hi All We are starting our bungalow renovations in the next couple of months and currently ripping out. We currently have joists and floorboard suspended floor. The plan was to rip up and replace with new slab, 200mm insulation, ufh pipes and 50mm screed etc. However when I lifted some floor boards the void below varies from 170mm to 500mm (to top of blues) below the floorboards look likes there is a solid concrete floor/slab. What would people do in this situation, it seems a waste to rip it and start again but I am not sure what options I have. Obviously the slab underneath isn’t flat as it follows the slope of the ground and I don’t know how thick etc it is all help/advice/information greatly appreciated Edited May 16, 2022 by richo106 Link to comment Share on other sites More sharing options...
Russell griffiths Posted May 16, 2022 Share Posted May 16, 2022 That concrete is probably what is known as ( oversite) just a thin layer to stop weeds and stuff, they used to build the dwarf walls on top of it that carries the floor joists. Its normally very rough and can differ in thickness massively. Depends how wild you want to go, I would probably take it all up. What do you want to achieve and how long are you going to live there. Link to comment Share on other sites More sharing options...
Mr Punter Posted May 16, 2022 Share Posted May 16, 2022 You need it all the same level, so you will need to fill part of it with well compacted layers of aggregate. Link to comment Share on other sites More sharing options...
richo106 Posted May 16, 2022 Author Share Posted May 16, 2022 4 hours ago, Russell griffiths said: That concrete is probably what is known as ( oversite) just a thin layer to stop weeds and stuff, they used to build the dwarf walls on top of it that carries the floor joists. Its normally very rough and can differ in thickness massively. Depends how wild you want to go, I would probably take it all up. What do you want to achieve and how long are you going to live there. That sounds exactly what it’s like to me! This will be our ‘forever’ home so i want to do it properly so I will be removing it. Thanks for the reply Would internal walls be built off this too or are they likely to have their own proper footings? I will be keeping 2 of the walls and building up from them as block walls to support roof structure Thanks again Link to comment Share on other sites More sharing options...
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