Ground floor suspended floor joists into solid brick wall

[Justintime4t]

Hi all,

So the concrete floor (50mm thick) in the kitchen area of my victorian mid terrace house that is damp needs to come up along with the back fill soil underneath.

The whole kitchen area is at least 300mm higher than it should be from previous occupants of the house.

The outside has been lowered by 300mm and reveal the original door step!

Anyhow, I'm looking at a suspended wooden floor to be installed at the existing floor level.

The span is less than 3M from outside wall to internal wall, both being made of solid bricks, 2 bricks thick.

Assuming that I get the correct load bearing and spaced joists should I hang these straight off f he 2 walls, or should I install a wooden joist ledge all the way dwn each side and then place the joists ontop of these ledges?

Also what are my options for DPM location - I'm thinking between the wall and the ledge only?

Thanks.

 

[gregers]

or build sleeper walls and place the plates on that,making sure you leave gaps for air flow.

 

[vinn]

OP, is this post referring to roughly the same situation that you referred to in your previous 21 june 2016 thread - and the extension & ACO drains?

 

[Justintime4t]

OP, is this post referring to roughly the same situation that you referred to in your previous 21 june 2016 thread - and the extension & ACO drains?

Hi Vinn,

Its the same room yes, but the option of Limecrete is no longer an option - therefore this post is asking specifically with regards to the suspended timber floor and what peoples opinions would be upon how to attach the joists to it - is there a problem with me posting this separately about the specific suspended flooring?

Cheers,

Justin

 

[Justintime4t]

or build sleeper walls and place the plates on that,making sure you leave gaps for air flow.

Thanks.

Sleeper walls might be an issue as I would have to dig them out right next to the existing wall foundations - or in reality is that not really an issue?

 

[vinn]

Its nothing to do with me where you post but it would help you in getting more informed advice if you kept same subject on the same page.

Briefly ref the suspended floor: you must have continuous front to back through ventilation through your house, and through your kitchen outrigger.
Hacking out pockets of brickwork is the simplest method of supporting joists. The joist tails are capped with DPC .
Air bricks must be inserted in the joist bays.
The membrane (DPM) must be spread across the whole sub area soil and lap up the walls about 100mm.

Without photos its difficult to advise on your other questions.