Laying a concrete floor indoors

[londonman]

The room size is about 8.5m x 5m and interrupted in the middle by a large chimney breast.

How do I level the concrete off/tamp it down since the existing walls prevent me and a helper from standing on either side of the floor with a long timber batten as you would do if you were laying a virgin slab outside?

Or do I lay the concrete slab in sections but even if I do this, how do I level off the concrete close to the walls?

Many thanks

 

[OLD]

Fix battens to the walls tamp to them when its all gone off chop them out and make good.
laser level useful setting up battens.

 

[londonman]

Thanks Old....walls a bit irregular but reckon I should be able to fix something up.

 

[londonman]

OLD - been thinking some more about the practicalities of this.

The dpm will have been tacked up the walls. Do I put the battens inside the dpm and then nail through the temporary batten AND dpm into the wall? If so then what about the holes that the nails will have made in the dpm since they will be level with the concrete course?

If I fix the temporary batten between the dpm and the wall then isn't it going to be rather awkward to find the battens through the thick and relatively inflexible dpm while tamping?

 

[OLD]

You will have to repair dpm and make good choose timber to give enough working room

 

[londonman]

Thanks... that clears things up for me.