Best way to patch up floor

Hi guys.

Removed chimney and need to patch up hole in first floor.

Seems straightforward but just wanted to check what the best solution is.

Aa you can see the one joist rests on internal wall and the trimmer joist also rests on other internal wall.

Would it be best to pack gap behind joist and drill through and screw to wall using correct bolts.

Or shall I just attach to side and up to trimmer then put some noggins in?





Thanks

i would sister the joist against the wall,then infil behind it then using some jiffys install a few noggins.and as you have cut the boards back,i would lay the new boards the opposite way.

Before anything else, clean up and vacuum the boards. What you dont want is hard particles getting into the gaps between the boards where they will squeak and grind.

Remove the carbon soot from the old flue line. When you've chipped and wire brushed it then blind it with a couple of coats of SBR or similar. Dont attempt to leave it and plaster over. Dont use gypsum plaster, use a sand and lime/cement 3:1 render.

As suggested, you could sister a length on, or run a full length from left to right with a screwed on infill piece to catch the space to the wall. Use your level.

Keep your new floor boards running in the same direction as the other floor boards.

Some of your boards seem to be T&G and some square edge - try for all T&G with the new stuff. You might have to pack them up a few mm's to meet the old boards.

All joins and cuts must be over some kind of bearing. Dont leave cut ends flying free. Over the pipes/notch area cut back to next joist.

Screw everything - use 2-1/2" x #8's. And remove all screws and nails from the joists - dont drive them in.

Work out how you will fix the ceiling plaster board - fit a noggin near the pipes and one centred.
Tack on ledgers to pick up any free p/b edges.

Thanks for the tips!

Once it's cleaned up I will be getting a plasterer in and it will be plaster boarded most likely along with the rest of kitchen as I've got a few new sockets to put in!