Levelling Joists

[StephenStephen]

If you have fixings long enough, fixing down into the original joists (rather than the sisters) would be mechanically more sound.

 

[cruddler]

OK thanks, will bear that in mind. I'm going to try and put cross pieces/noggins perpendicular to the sisters/joists too where height allows to give it more rigidity and to give more fixing points.

Is OSB2 secured with screws the current preference for a subfloor? Here in France it is the median price option with Agglomere (Chipboard) the cheapest and Plywood the most expensive (by far).
Thanks

 

[iwanttodiy]

Hi

My 1930s house had unlevel floors. They were low at the sides of the room and high in the middle.

I ended up levelling my floor joists by tacking on shim cut from scrap wood. then putting the timber floorboards back in. This gave me a level floor to install over floor underfloor heating boards.

Attached are some photos. This was done about 5 yrs ago and I’m not yet aware of any problems (fingers crossed)

 

[cruddler]

Thanks Kenny, but I have already gone down the sistering route due to the room size and the differences in height.

Can anyone offer advice on the subfloor? OSB2, Chipboard or Ply?
Thanks

 

[TicTac]

P5 chipboard is okay, and more manageable than ply, as well as being cheaper, but glue the edges. I'd never use OSB, but I know some do.