Finished floor level question in my timber frame

[janedevon]

Hi guys appreciate an answer as im confused.

Timber frame guys fitted all our extrnal wall insulation today all foiled up and ready to batten tomorrow to create a service void.

i just questioned where the batten was going to go and he was planning soleplate level, our planned ffl is level with top of the soleplate and we are hoping for polished concrete so need the depth, so,i said can you attatch batten to the base of the panels leaving soleplate to be clear for us to flood it with conrete to ffl.

he said it was unusual as he always battened to the soleplate but in my eyes if so the batten will be lost within the floor.

is what i mention acceptable or am i bringing concrete too high to go level with soleplate?

Thanks

 

 

 

[TerryE]

AFAIK, it is standard for the soleplate to be at slab level.  If you want a polished slab then the soleplate will be at FFL.  In our case, we are having slate on the GFL so the FFL will actually be 10+6 mm (slate + adhesive) or 16mm above the soleplate.  Though in our case we have an MBC passive slab and timber frame so the soleplate is part the frame truss.

[janedevon]

Thanks Terry

thats put my mind at rest was worried i was doing something unusual, still cant see the point in putting batten level with sole plate as it will be no use for fixing plasterboard to ill just have him batten to the timber above the sole plate, then i can insulate under the batten to avoid cold bridging with wall edge.

[Alex C]

The polished concrete or screed should come up to the underside of the sole plate, not flush with the top. Having a sole plate in what is effectively a trough is not good practice and was one source of rotting sole plates in older timber frames and has not been good practice for some time. Any leaks or floods in a building will have the water sitting around the sole plate unable to run out. Not sure what building control thoughts would be on this one. You would normally expect the sole plate to sit on a course of 75mm concrete blocks that would then take up the depth of your screed or polished concrete. Without knowing the full make up of the floor/frame it is hard to comment in full. A passive MBC type slab is not the same as normally you would just tile or fix 20mm wooden floor over the slab rather than a screed or more concrete.