Render and plaster or dot and dab over internal brickwork?

10 Dec 2018
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United Kingdom

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 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.

It looks like it might be easier to dot and dab/baton plasterboard over this recess wall, however i have a couple of questions about this:

1. Should the brickwork be waterproofed first? If so, with what?
2. How does one install fixings to a dot and dabbed wall (e.g. heavy photo frames etc), as there will be a cavity between the plasterboard and brickwork?


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