Mortar instead of Plaster possible?

[zanwan]

Hi

I'm currently renovating a bathroom and have removed some tiles from around the bath. A small patch of plaster has come off, revealing the bricks. Its about 40cm square.

Now to cover this, do i have to use plaster or could i use a sand and cement mortar mix instead?

 

[rebait]

Hi Naz,
I would firstly say, how deep is the coating in the area to be patched? That might be useful info, additionally, can you see the base construction material ( Brick, block, timber lathes, )that had been plastered/rendered? depending on that factor can be the suitability of repair material.

Please advise so I can give a respectable answer.

 

[zanwan]

Hi Rebait

The depth of the plaster looks about 10-12mm

The underlying material is standard bricks.

This area will likely have a shower installed so do i need to consider any waterproofing additive in the mortar or plaster mix?

 

[Richard C]

Rather than use conventional sannd/cement render which you will have to wait for it to dry (could be up to 4 weeks if back to brick) before you tile, use either a quick set render or powder cement tile adhesive which you can tile over the next day; you will need to use powder adhesive anyway if your using large format tiles, tub ready-mix is not suitable. Do not use gypsum base plaster to fill out, it’s not suitable as a tile base.

Before you go too far with your project, I would advise you read the Tiling Form sticky & have a good read through the archive posts, it may prevent you making some common & potentially expensive mistakes.