July 27, 20224 yr I need a small section of structual first floor to be removable. How best do I arrange the joists for this to work? Background: We are building an extension with UFH. There's a small section of the 'new' part of the structure which will be part of a hallway that extends into the old part of the house - We are planning UFH for the old part but at a later date. I'm having a wet system in a pugmix under the structural floor (old and new bits of the house), so the UFH needs to go down before the structural floor. As we're reaching the point where I can start installing the UFH in the extension on the first floor, this small 1.1sq m alcove will have a floor laid, but it will need to be lifted at a later date (1/2 years from now most likely). This area is crossed by 3 floor joists and has a wall-plate on one edge. Could I place additional noggins around the perimeter of this section to allow an independent floor board to be removable later? Is this the done thing in such situations? Any other suggestions?
July 28, 20224 yr Not sure how UFH under a structural floor works but nothing wrong with noggins to fully support a removable section
July 28, 20224 yr Author 2 hours ago, markc said: Not sure how UFH under a structural floor works but nothing wrong with noggins to fully support a removable section The pipes sit on an insulation layer between the joists, just below the top of the joists, supported on ply between the joists. Then a dry sand/cement biscuit mix is used to infill around the pipes (to provide some thermal mass) up to the level of the structural floor.
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