Hey, I'm about to rebuild my downstairs extension floor and am after a few tips. It was a very badly constructed concrete floor and prior to that would have been suspended timber (it's a Victorian terrace).
My plan is to secure timber wall plates (are they called wall plates?) to two opposing walls with resin secured M12 threaded bar at 600mm centres (2.8m span) and then run 4x2s between the wall plates (2.1m span) at 400mm centres on joist hangers. I know that the more simple option would be to rest the 4x2s on top of the wall plate but this would not leave sufficient void under the floor for ventilation. If anyone could shine some light on these questions that would be great:
- Does 600mm spacing sound OK on the chemical fixings? I plan to use 4x2 wall plates with a fixing hole through the centre of the timber.
- I'm worried about getting the wall plates level in the vertical plane. They being fixed to a solid, double skinned brick wall which is almost certainly not plumb. I figured I could potentially render over the brick to get it level before attaching the wall plates but I'm by no means accomplished at rendering and frankly, it's a bit of a faff. Quite time consuming and means I'll no longer be able to see the mortar joints and I want to make sure I get a good fixing. Can anyone suggest a good method for getting them level?
Thanks for any help.
My plan is to secure timber wall plates (are they called wall plates?) to two opposing walls with resin secured M12 threaded bar at 600mm centres (2.8m span) and then run 4x2s between the wall plates (2.1m span) at 400mm centres on joist hangers. I know that the more simple option would be to rest the 4x2s on top of the wall plate but this would not leave sufficient void under the floor for ventilation. If anyone could shine some light on these questions that would be great:
- Does 600mm spacing sound OK on the chemical fixings? I plan to use 4x2 wall plates with a fixing hole through the centre of the timber.
- I'm worried about getting the wall plates level in the vertical plane. They being fixed to a solid, double skinned brick wall which is almost certainly not plumb. I figured I could potentially render over the brick to get it level before attaching the wall plates but I'm by no means accomplished at rendering and frankly, it's a bit of a faff. Quite time consuming and means I'll no longer be able to see the mortar joints and I want to make sure I get a good fixing. Can anyone suggest a good method for getting them level?
Thanks for any help.