I have read on other posts that to bring a concrete floor up to the height of another floor (suspended wood in our case) you can either lay 100mm celotex then 50mm or so of concrete; or lay joists across the concrete floor and flooring on top.
In our case, we have pipework running from a washing machine and dryer etc which currently just runs along the top of the concrete floor (its a utility area off the kitchen)and we want to reposition these at the same time we raise the floor so prefer the second (joist) option as we can then pipe between joists under the floor.
I'm looking for some guidance on the best way to go about this to do the job right. Is this an acceptable method? How do I secure the joists to the concrete? Do I need to lay them on a DPM? Can I still insulate with celotex (or similar) between the joists. Do I need to ensure ventilation in the underfloor space? Does anybody have any suggestions for how to do this and what to use (eg insulation granules instead of celotex)?
In our case, we have pipework running from a washing machine and dryer etc which currently just runs along the top of the concrete floor (its a utility area off the kitchen)and we want to reposition these at the same time we raise the floor so prefer the second (joist) option as we can then pipe between joists under the floor.
I'm looking for some guidance on the best way to go about this to do the job right. Is this an acceptable method? How do I secure the joists to the concrete? Do I need to lay them on a DPM? Can I still insulate with celotex (or similar) between the joists. Do I need to ensure ventilation in the underfloor space? Does anybody have any suggestions for how to do this and what to use (eg insulation granules instead of celotex)?
