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Surely the thing to do is rip up the whole floor and buy a joist that's 1' longer?
Nah, bolting an extra section to the current joist should do it, but you'll probably want it to be 3x as long as the unsupported section so you can get it nice and secure, otherwise squeaky floorboards 4lyf no?
rhowe-
I don't see the need to rip up more floor. The new joist will be supported at both ends. One at the existing joist / sleeper wall, and the other on a new cross joist / wall plate at the front of the chimney breast. It's just quite how and where we attach the latter that's undecided.
In other news, I got a free belt sander today, just because the previous owner didn't think to change the belt and though it was broken. Win.
Polygon
Shitty floorboards removed and cable trunking laid in the lounge. Just got to get it all routed under the bedroom floor. Tomorrow will be trying to source the replacement boards and sort out the joist.
I know it isn't the standard method, but is there any reason I shouldn't just bolt the cross joist to either side of the chimney stack, and do I need to treat the timber with some kind of damp proofing if I do this?