Removing floorboards under internal walls

[HerodDIY]

I'm In the process of taking up floorboards on the ground floor of our Victorian terrace. They have all been effected by a serious case of woodworm. The Joists below are unaffected and have been sprayed.

I'm going to replace the boards with an 18mm plywood subfloor.

The problem I have is removing the two boards that run under two internal walls. The Walls run parallel with the boards and perpendicular to the joists. One wall is supported by a brick foundation which goes down into the cellar.
The other one just seems to be held up by the joists.

The original boards are in terrible condition (they crumble in your fingers) so they need to come out. I'm just worried that the walls will drop if I take the boards out, before replacing with the ply.

Any tips on how to do proceed?
Cheers.

 

[HERTS P&D]

If the wall is sitting on the floor board all you can do rather then risk parts of the wall falling/coming loose is to remove the floor boards upto the wall and treat the floor board under the wall with the appropriate wood treatment. Then board upto the wall with your new ply.

Depending how bad the rot is on the floor board is under the wall.

Andy

 

[Deluks]

Get a small chisel and chop them out in sections, replacing with smaller cut sections as you go along. If the floorboards are ad bad as that you might find the joists to be crumbly too, could turn into a much bigger job!

 

[HerodDIY]

Thanks for the replies. It doesnt look like the joists have been effected. A survey came and had a look and they've now been professionally treated. I'll have a go at chiselling out the worst sections and replacing with ply.

Thanks.

 

[foxhole]

You can remove all the wrotten timber just do it in 600mm sections replacing ply as you go that way you only leave a small section unsupported at any one time.

 

[stewartlaura67]

Great! You got the things done! Kudos to you.