Dot and dab or cement render/plaster?

[mrmeanor]

Hi,

I have had to remove a load of blown plaster, up until now it's been fairly small patches, but i will have an entire recess wall next to a chimney breast which will be back to brickwork (see pic).

The original render was cement scratch coat followed by the original victorian plaster (with horse hair etc.). The house is double brick skin (no cavity)

Up until now i've been patching up the smaller areas with cement render followed by hardwall, however for this larger area i'm not as confident cement rendering to a flat surface as i'm not familiar with the straight edge.

So questions are:

1. Can i use dot and dab plasterboard, or will it need cement render then undercoat plaster?
2. If it need to be cement, does it need to be 100% flat, or can it just be flattish and the following undercoat made flat ready for skimming?

wall.PNG (985.43 KiB) Viewed 1427 times

[arco_iris]

The house is double brick skin (no cavity)

IMHO, for the purposes of insulation I'd suggest none of the above but plasterboard over studs, and preferably with the uprights wedged in floor to ceiling, not fixed to the wall. You don't have to listen to me though.

When I did this job, there was the advantage of putting in extra electrics using drywall back boxes (the existing galvanised boxes were rusted out) and all the cabling for a wall mounted TV - with extra studs to hang its bracket on.