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- 26 Jun 2021
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Morning all, looking for some guidance please on correcting a garage conversion. I asked some time ago a similar question, however the job has finally come around and not everything is as I thought it would be previously.
Previous owners had installed a floating floor DPC/22mmT&G/100mmEPS/22mmT&G. I previously thought there were joists under the bottom layer of T&G, but that was only half the case, the sub base slopes, and basically had been levelled really poorly using joists, bits of plasterboard and all sorts of things, which is what I assume lead to the terribly springy and noisy floor (that also hadnt be glued).
That said, it's all been removed and i'm left with a concrete subbase that is 165mm at the shallowest sloping down to 265mm working floor height at the deepest. I intend finish the floor with CemFloor Therm Screed with UFH installed.
Due to that fact i've lost insulation depth due to the slope, i was planning on taking the following approach:
- Levelling Sub Base (leaves me with consistent 165mm WFH) - Unsure how, MOT or do I need a pour? Trying to avoid getting concrete guys out twice and also avoid having to leave a large drying time before I can cover it with XPS.
- 100mm of XPS (to improve efficiency & compensate for loss of depth)
- Wet UFH and 57mm of CemTherm Screed
Thoughts welcome, particularly on options to level the sub-base. Also considered sticking an few extra 75mm sheet in the deepest part before levelling, but i'm not sure that will achieve anything.
Thanks in advance
T
Previous owners had installed a floating floor DPC/22mmT&G/100mmEPS/22mmT&G. I previously thought there were joists under the bottom layer of T&G, but that was only half the case, the sub base slopes, and basically had been levelled really poorly using joists, bits of plasterboard and all sorts of things, which is what I assume lead to the terribly springy and noisy floor (that also hadnt be glued).
That said, it's all been removed and i'm left with a concrete subbase that is 165mm at the shallowest sloping down to 265mm working floor height at the deepest. I intend finish the floor with CemFloor Therm Screed with UFH installed.
Due to that fact i've lost insulation depth due to the slope, i was planning on taking the following approach:
- Levelling Sub Base (leaves me with consistent 165mm WFH) - Unsure how, MOT or do I need a pour? Trying to avoid getting concrete guys out twice and also avoid having to leave a large drying time before I can cover it with XPS.
- 100mm of XPS (to improve efficiency & compensate for loss of depth)
- Wet UFH and 57mm of CemTherm Screed
Thoughts welcome, particularly on options to level the sub-base. Also considered sticking an few extra 75mm sheet in the deepest part before levelling, but i'm not sure that will achieve anything.
Thanks in advance
T