Concrete Slab Question

[Ellwood]

Hi All,

I am currently building an attached garage along the side of the house, this will be 3 m wide by 8 m long.
I have complete the below ground brickwork to floor level, and I am almost ready to lay the slab.
However, I cannot see how to tamp the concrete along the side house itself, as it will against the wall.
How do I support the tamping board to ensure the floor remains level?
I suspect there is an obvious answer, but i cannot see it.

Any help will be greatly appreciated.

Many thanks,
Simon

 

[noseall]

The un-shuttered side needs to be tamped first using a spirit level and board. You then tamp the concrete to this using it as an effective screeder level.

If you were mixing it yourself you could mix this screeder concrete a bit stiffer or ask the wagon driver for some stiffer muck. This will stop the screeder concrete from slumping whilst you tamp to it.

 

[fastneattrowel]

Hi All,

I am currently building an attached garage along the side of the house, this will be 3 m wide by 8 m long.
I have complete the below ground brickwork to floor level, and I am almost ready to lay the slab.
However, I cannot see how to tamp the concrete along the side house itself, as it will against the wall.
How do I support the tamping board to ensure the floor remains level?
I suspect there is an obvious answer, but i cannot see it.

Any help will be greatly appreciated.

Many thanks,
Simon

if your brickwork is level by the side of the house that should give you a good guide, better to do it all in one go

 

[noseall]

if your brickwork is level by the side of the house that should give you a good guide, better to do it all in one go

Generally any existing brickwork is obscured by the polythene (dpm) turn-up.

 

[fastneattrowel]

if your brickwork is level by the side of the house that should give you a good guide, better to do it all in one go

Generally any existing brickwork is obscured by the polythene (dpm) turn-up.

cut the polythene off a inch below the level then after you tack it to the side

 

[Ellwood]

Thanks for the replies both, I can now see how it is done.

The brickwork on the house slopes by about 10 mm front to back and as you say I will not be able to see it once the dpm is down.

The new brickwork is level though, I guess I could use a line between the front and the back walls as a guide - allowing for sag in the line of course?

Is fastneattrowel's suggestion of cutting the dpm below floor level legit?

Many thanks
Ellwood

 

[mater]

yes that is fine , another way is to fix a batten to the wall so the bottom of it is level with top of concrete and remove it the next day.

 

[Ellwood]

Thanks mater.