Hi! Can anybody please tell me how to make plaster from from cement??

Question

What is used in the mixture and the consistency it should be? I am doing some DIY in my garden. I want to plaster my outside concrete garden wall. Thank you all in advance!

Answer 1

Use a simple cement render.

This is made up of 1 part cement to 5 parts building sand. (You can buy ready mixed packs from DIY stores).

You'll also need to add a waterproofer / plasticiser mix to the water that you use to mix it. This will help the render stay clean and dry (rather than going damp and mossy over time). Again this can be bought from DIY stores.

It would also be a good idea to treat  the wall with a PVA wash before you apply the render - this will help it stick.

Mix 1 part PVA glue and 3 parts water and brush over the wall beforehand.

P.S. The consistency of the render should be like butter cream that you get in cakes.

Answer 2

DON'T USE WASHING-UP LIQUID AS A PLASTICISER!!

Answer 3

Yeah,I do it all the time on commercial projects that require a textured finish on block walls.

I will either use portland powder or a synthetic stucco.Nice thing about the synthetics is you can have different colors.As for consistency make sure your product is mixed well and dry to stay on wall.

You didn't mention what the wall was made of,so you may need to nail wire to wood.Here's a handy little link for you.

Good Luck

Answer 4

I'd agree in part, with Just Me, and no offense to others, but you can buy pre-mix.

   I'll assume, without offense to you, that you don't strictly mean Plaster, but a mix for perhaps doing a textured finish on the wall, similar to stucco, trowled on.

   You do state concrete wall, as one answer missed that, but not that it's block, or a pre-formed slab vertical to you.

   Around a house I had built in 1992, the walls are block, with "cement" trowled on. No wire mesh, no lath strips. The house itself was "stuccoed" in a fiberglass blend, also trowled on, no wire mesh.

   After 16 years they hold up very well, only being painted once in that time.

   Any bag of pre-mix will explain some mixing procedure. Obviously a mix with fine aggregate. For your purposes, I'd suggest the consistency of mashed potato. The process in mixing is simple. Just set yourself up with the proper tools, some container to mix and scoop from, add water slowly until a consistency is achieved, and have at it.

Steven Wolf

Just my two "sense"

Answer 5

Plaster is no good for outside,You need render,This is made from washed sand(the finer particles of sand has been removed)Portland cement.And clean water,A waterproffing add mix is recomended.Two coats are required,The first coat to be scratched, To help the second coat to adhere.Four parts sand to one part cement.

Answer 6

you will need to make a render mix ..this is a strong mix as its on a garden wall ..4 to 1 ..4 parts PLASTERING sand ...1 cement ...do not use building sand ..or any other type of sand ..plastering sand is made for render only ..mix by WEIGHT only ...not volume ...a shovel of sand weights more than a shovel of cement ...that's how professionals do it ...like ready mix concrete plants ...use a plasticiser ...but NEVER EVER washing up liquid ...it kills cement .....mix to a thick consistency ...apply a scratch coat ..leave for 24 hours ..then the top coat ..using a plastic float to rub up to a level finish ..

Answer 7

5 parts sand to 1 part cement,by volume. Add plasticiser (washing up liquid will do, 1 egg cup/gallon) and water.,Mix till butter cream consistency,not too thin or it will run.

Dampen the wall before plastering it.

Answer 8

You can't use plaster externally, you need rendering, see the link......

http://www.diynot.com/pages/op/op006.php...

Answer 9

Cement, sand and water, that's all, keep adding until you get the required thickness