Floor joist mess

randomi15

Hi all,

I have a wall between my bathroom and bedroom in first floor.

Upon removing floarboarda I can see the wall which seems to have been made from breeze block does not rest on joist or the wall downstairs.

The joist is away from the room
Side by around 6 cm and on another side around 20cm

No problem is where do I fix the floorboards to apart from running it under wall which is not practical as what happens if I need to lift then then I also need to lift carpets in that room.

So I am thinking I can get wood and run it between the joist on all points which the floor board rest on and then nail my floorboard to that on each side of the wall.

The wood will be as thick as current floorboard

So in a way if you imagine number 11 i will creating a connection between the legs all its length b
Horizantally

Does that weaken the joist?

randomi15

Here is picture which should make above clear .
You cann see the floorboard is resting on air. If I crete a horizental supprt across then each side can rest on that wood .

The wood will then be screwed to joists on each side

Doozergirl

What I think you are describing is called a noggin. Have a google. Add the word 'joist' as you'll get pictures of Noggin the Nogg otherwise.

Yes, you can do that, but you may need one larger one running paralell to the joist first so that the boards also have support on the widths, or they will collapse.

I'd be more concerned about the breezeblock wall resting on one joist :eek: That would be coming down and rebuilt in studwork in my house. At least get a structural engineer to look at it.

If you do rebuild, you can board the floors correctly.

randomi15

Well if it runs side to side like the pic below.

Specifically the second one in the pic which has a label of joisy

Re wall, it has been built like this and house is from 1930s so for the pat 80-90 years it hans't collapsed !!!

squeekswhenwalking

If the replacement boards aren't going to be taking much weight, I'd put a baton parallel to wall from under existing floorboards either side of hole and halfway under cut off stubs of board by wall, screw through adjacent floorboards and Stubbs into the batton and lay your new boards (or your off cuts you took out) onto the baton.

squeekswhenwalking

Btw it was common to find breeze and cinder block walls built onto floorboards. Not saying it's a good idea but you still find them in tact.

randomi15

So if undrstand correctly what you are saying is to run joist and new wood side by side and then screw it in?

societys_child

squeekswhenwalking wrote: »

Btw it was common to find breeze and cinder block walls built onto floorboards. Not saying it's a good idea but you still find them in tact.

yup, my 1945 semi, and many houses locally, have 2" breeze dividing walls, built directly on floorboards, on the first floor. It's not a problem, they used much better timber for joists and floor boarding back then.

andyhop

Either bolt new 6x2 timbers onto the Side of the existing joist or joist hangers between joists then span the opposite way

We have to deal with this on a regular occurrence, always stripping back tongue and groove flooring and replacing with 25mm marine

Most of the block walls sit on a timber sole plate directly on top of a joist , its certainly not uncommon and defiantly doesn't need removing and replacing with timber stud work , just a little sensible bracing

randomi15

So what you saying is the wall does rely on plasterboard only? If I remove the wall below it nothing happens!