In article ,
MattP {add mattspersonal before @} wrote:
To be honest Dave I got out the circular saw and cut down through the
T&G, did a great job expcept that on the first cut the depth plate
slipped and I cut a 1" slot in the ceiling joist. Can't see it being a
problem as it's a 20cm deep joist, however, will make good using
'sister' pieces and bolts.

Oh dear. ;-) I tend to use a jigsaw for this sort of thing, with a blade
snapped off to the maximum depth of cut I need. Slower than a circular
saw, though.

I'll replace the old c.board with new and screw them down not nail gun
it.

Absolutely. Screws don't come loose.

However, I don't understand why they had to use such long nails when the
upstairs hallway boards are screwed down. I've got to go through at
least another 2 boards yet.

I'd say they'd run out of the proper fixings. Work *must* go on...

Whadya think of the router option to cut the board away from the nails?

Personally, I'd cut traps rather than lifting whole sections, since boards
without the tongue and groove will move rather too much where they're not
supported. You can batten round the traps and get a good fixing to that.
But the main thing which ever way is to get a good rigid floor with no
creaks.

--
*Some days we are the flies; some days we are the windscreen.*

Dave Plowman London SW 12
RIP Acorn