Is lime plaster best for replastering a wall that was previously damp but has now been sorted? Best mix?

Question

I dont want to hide it with drylining over it, on the outside chance the dampness should ever come back.

Answer 1

lime plaster is for stone walls built with lime mortar or walls which need a slight movement or expansion allowing them to breath.follow therse instructions; if your walls are stone add a shovel of hydrated lime to your mix of floating.
if its old brick dont add lime, heres what id do :

1. wet the walls throughly to remove any dust.

2. scud the walls with a strong surry of 2:1<2sand 1 cement> with a lot of mortar mix in it.scud= throwing it at the walls like dash, to provide a key for the floating.

3. mix a floating mix of 3:1, not a lot of mortar mix <60ml> and some salt resisting admix< which was left by the dampproofers ie brunopel or soverign>about two capfulls. and apply with a hawk and trowel,straighten it off and fill in holes and float with a polyureathne float with panel pins in the top side of the handle, to apply a scratched floated surface.

4.skim the floating with gypsum finish

5. paint in 3 to 4 days once finish is dry

good luck

Answer 2

If you are working on a wall that has been damp. you should have removed all the old plaster down to brickwork and renovate using 3 sand to 1 cement and add waterproofer to the mix this will provide a sufficient barrier against any more damp, then skim with finishing plaster adding lime to the mix, if this is not added the plaster can shell away from the rendering. been a qualified plasterer since 1981. Hope this helps.

Answer 3

If it's been treated properly then it should not come back. Lime plaster is used where the walls need to breath. Depending on the type of property you are talking about IE a normal house then all you need to use is normal plaster. Have you removed all the old plaster, treated the walls by injecting silicone. if you have then all you need to do is first layer bonding, second layer browning, and then finish with 2/3 coats of finishing plaster. The method used by most plasterers these days is whats known as dot and dab. This is where you make up a mix of dry wall adhesive apply to the walls and then fit plaster board. Done right you will get a good flat and level surface both vertical and horizontal, with square corners. Then finish by skimming with board finish plaster.

Answer 4

Is the Tarmac a top coat for the plaster? I'm not familiar with this product. If so you should be able to use a primer that will go on new plaster. You typically have to wait at least 7 days for new plaster to cure. You can find the primers at any paint store. Give the walls a light sanding and then apply your finish coats. If the Tarmac is a finished product you may be able to use the wall paint with no primer.

Answer 5

on our building firm we deal with lots of damp walls dot and dab is an easy way of doing it but somtimesif the damp comes back it makes a mushy mess of the plaster board so we genarlly apply one coat of cement render six sand one cement and one hydrated lime with a water proofer for added protection then one coat of bonding one browning and they a coat of multi finsh over skim plaster dose the job lovley

Answer 6

the best plaster to use is called limelite ..you need to remove all loose material from wall and wet wall down before applying ..but after you have applied the first coat ..there will be no suction ..and you need to be a skilled plasterer to get a flat finish ..you need to take it a metre high from floor