A long storey but my project started out as an extension & refurbishment but has turned in to a new build due to old foundation constraints... I have planning permission for a certain height building and the room heights worked out OK (2.35m) but I had not accounted for Part E as it wouldn't have applied. I factored in a first floor thickness of 300mm originally but it now seems I need to make it 415mm if following robust details (RD). I want to maintain the ceiling height and cannot make the building any taller (neighbours and council objected to planning and pre-apps for taller buildings were all negative) so would like to know if there are any innovative ideas to meet Part E without going to the extent of RD?
I plan to use metal web joists @400cts and 256mm deep.
Comments
Thanks.
We had similar (extension ended up as a new-build) and a lot of the things such as acoustic testing were waived as long as he was happy with principle of what we had done.
As the floor is between parts of the same dwelling you only need meet part E2 (Table 0.2) not the more difficult E1.
Perhaps see...
https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0CDIQFjAD&url=https%3A%2F%2Fwww.lancaster.gov.uk%2FGetAsset.aspx%3Fid%3DfAA5ADQAMgA2AHwAfABUAHIAdQBlAHwAfAAwAHwA0&ei=RSe1VJWJCcfhaOL7gIgD&usg=AFQjCNHdybQ5zHX8BscnGX7b3GE0RLoxLw&sig2=7iSuGBjyBP60rrgfuS8TwQ&bvm=bv.83339334,d.d2s
On page 4 it suggests that you can meet E2 using..
"Timber joists, engineered I beams or steel joists with floor boarding having a mass of at least 15Kg/m2. Ceiling lined with 12.5mm Wallboard TEN. 100mm Isowool General Purpose roll or similar in the cavity, all joints to be well sealed."
or
"Timber joists, engineered I beams or steel joists with floor boarding having a mass of at least 15Kg/m2. Ceiling lined with a double layer of 12.5mm Wallboard, all joints to be well sealed."
No mention of the depth of the joist other than the need to fit 100mm isowool on the first option... but check for any small print I've missed. Discuss with your BCO.
Are you building detached, single dwelling? If so, why are looking for Part E solutions?
Cheers:smile:
Worry over, I can continue as I was going to use at least two layers of plasterboard - thick carpets and underlay.
ward32, I would ask your BCO/BCB before you spend any money.
Good luck:smile: