Best answer
If you sort the plasterboard out level/flat.........you don't need to plaster it at all....... tile directly onto the plasterboard, because if you are not experienced in plastering, you could end up in a worse state. Sort the plaster board, it's not that heavy.......then prime with acrylic primer.......then tile it.
Do I need to seal cement board before tiling?
Contrary to popular thought, tile and grout are not waterproof, and some moisture will penetrate even if sealant is used. ... However, if you choose to use concrete backerboard, which is much stronger and more durable than gypsum board, a water vapor membrane must be placed underneath it or a sealant applied on top of it.
Do you need to waterproof cement board before tiling?
So, if you're looking for durability and strength, concrete backer-board will probably be your choice. First, you should provide a waterproof/resistant membrane against the wood studs before installing the concrete backer-board to protect the wood studs from moisture absorbed through the backer-board.
Do you need to tape cement board before tiling?
2 Answers. The thinset and mesh tape are to strengthen the seams. If you are going to tile over the cement board, you should tape the seams. If you just want to leave the corners untreated that will probably be fine, because that seam won't split the center of a tile.
How many bags of cement do I need for plastering?
To plaster 100 square metres (15 millimeters thick) you will need: 12 bags cement + 2,3 cubic metres sand. Using masonry cement complying with SANS 50413 class MC 22,5X or MC 12,5. To plaster 100 square metres (15 millimeters thick) you will need: 14 bags cement + 2,25 cubic metres sand.
Do I need to prime concrete before painting?
Generally speaking, priming is so essential to successful painting outcomes, concrete will always needs a primer. However, the existing surface needs to be primed before painting if: It is unpainted. It is peeling.
Can I plaster straight onto brick?
Plastering Directly to Brickwork Before old brickwork can be plastered it will need to be cleaned off and prepared. It is vital that the condition of these walls is assessed and rectified where necessary — crumbling old brickwork will not take a new coat of plaster.
Do you need to prime cement board before tiling?
Do I need to prime HardieBacker® board before I tile onto it? No. HardieBacker tile backerboard is ready to tile once installed, just wipe down with a damp sponge to remove any dust prior to tiling.
How long does bonding plaster take to dry?
Bonding about 2-3 hours, but some do leave it to following day before skimming depends on size of area. The 3-4 days is a guide, the colour of the plaster will tell you when it's dry enough to paint. Need to leave decent time between paint coats, for each to throughly dry before applying the next one.
How many coats of plaster do you need?
The number of coats that you will need to apply depends on how deep the hole is. Any hole under half an inch should only require one coat. Deeper holes will need two coats. Just like when you're plastering an entire wall, make sure you scratch the first layer of plaster before you apply another coat on top.
Do you need to plaster drywall before painting?
The normal advice is to use cheap MATT emulsion paint, watered down a bit, for the first coat as this will act as a sealer. Also if the plaster has been polished and is very smooth give it a quick light sanding will help any paint to stick well. You do not need to use a Primer on bare drywall.
Related Question Answers

James Lin
ProfessorCan I use plaster to fill holes?
How to repair cracks and holes in plaster. You can fill a deep crack with screwed-up newspaper, which makes a good base for the filler. For larger holes, you might need to build up several thin coats of filler rather than one thick one, making sure to let each coat dry before adding the next.

Slava Fomin II
ProfessorShould a concrete floor be sealed before tiling?
Concrete sealant or paint prevents the adhesive from sticking properly. You will need to use an acid-based solution, like muriatic acid, to rough up the surface if the top of the concrete is still smooth. Let the surface of the concrete completely dry before installing tile.

Onik
ProfessorDo I need to prime concrete floor before tiling?
As a general rule, we would say use a primer of some description to prepare your floor prior to tiling. ... For instance, an old concrete floor that was tiled previously will probably not need a primer, as long as the surface is clean and free from old adhesive and anything else that was stuck to the floor.

Ferdinand Beyer
ProfessorDo I need to seal concrete floor before painting?
For a clean and even coat of paint, your concrete surface will need to be thoroughly cleaned before primer is applied. Use a strong sealer to fix any cracks and seal the interior surface of the concrete completely.

EricZhao
ProfessorHow much concrete do I need for a deck post?
One 80-lb bag of concrete yields . 60 cubic feet when combined with 4 quarts of water. If you're purchasing 80-lb bags of concrete, you'll need 1.66 bags of concrete. As before, since bags of concrete are only sold in whole quantities, you'll need to purchase two (2) 60-lb.

Wilt
ProfessionalCan you tile directly onto plaster board?
Yes, apply an acrylic based primer such as BAL Primer (undiluted) to the plasterboard with a brush or roller and leave to dry before applying any powered adhesives. All board joints and internal corners should be reinforced using a suitable alkaline joint tape before tiling.

Aron Rotteveel
ProfessionalDo I need to seal my concrete floor before tiling?
Although you don't need to install an underlayment between the concrete and the tile, you need to prepare the surface before placing the tile. After all, cracks and uneven areas in the concrete can cause damage to the tile above, and uncontrolled moisture in the concrete can destroy the mortar and loosen the tiles.

Jesper
ProfessionalCan I skim plaster myself?
Well, I'm here to say you can do it yourself! You can plaster those walls! ... Anyone can plaster a wall (really, anyone), but you need to follow a formula. You can't just pick up a trowel and start throwing plaster on the walls.

Thanatos
ProfessionalCan you put ceramic tile over concrete outside?
For an outdoor tile patio installation to be successful, it needs a solid base, and a concrete slab is an excellent choice. ... If you already have a slab in place, that will save you some work. But before you can start tiling over this base, you need to examine it more closely.

FZs
ProfessionalHow do I make plaster handprints?
To make a cast of your child's hand or footprint, pour one inch of plaster mix into a paper plate. Wait two minutes for plaster of Paris and six minutes for patch plaster to settle before imprinting your child's hand or foot. Have your child press her hand or foot gently into the plaster.

Jordão
UserHow do I seal new plaster before painting?
1. Seal it. You first need to seal new plaster to make it less absorbent and to help the topcoat adhere better. A common way to seal it is with watered-down emulsion (known as a mist coat), as the plaster sucks up the water and becomes less absorbent.

Ben
UserCan you tile over plaster walls in a shower?
Fresh plaster, whether applied as a patch or to the entire wall, must dry completely before tile is applied. The adhesive and tile will block moisture from evaporating. Tiling over damp plaster causes the wall to fail because the plaster won't become strong if it can't dry out.

Bart Krakowski
UserCan you tile plaster walls?
Fresh plaster, whether applied as a patch or to the entire wall, must dry completely before tile is applied. The adhesive and tile will block moisture from evaporating. Tiling over damp plaster causes the wall to fail because the plaster won't become strong if it can't dry out.

solaimuruganv
UserDo I need to acid wash concrete before painting?
In most cases, special cleaning and/or etching of the concrete surface will be required before painting, and the appropriate cleaner (often TSP, trisodium phosphate) and etcher (usually a solution of muriatic acid) can be obtained..

Mark Baker
UserDo I need to acid wash new concrete before sealing?
The acid washing of concrete is a requirement after the concrete has cured sufficiently, in order to remove surface efflorescence and to open the pores before sealing. This will help the sealer to penetrate and result in a superior bond between the sealer and the surface.

paercebal
GuestDo I need to plaster bathroom before tiling?
Tiling on plaster is ok, as long as your not fitting large format tiles. Still prime the plaster (obviously when dry) with acrylic primer. NOT PVA. Why plaster though.....not really necessary.

Chris
GuestDo I need to prime a concrete floor before painting?
Generally speaking, priming is so essential to successful painting outcomes, concrete will always needs a primer. However, the existing surface needs to be primed before painting if: It is unpainted. It is peeling.

M.Innat
GuestDo I need to prime cement board before tiling?
Do I need to prime HardieBacker® board before I tile onto it? No. HardieBacker tile backerboard is ready to tile once installed, just wipe down with a damp sponge to remove any dust prior to tiling.

csharptest.net
GuestDo I need to prime concrete before epoxy?
One of the most common questions I get with epoxy floors is if it is necessary to prime the floor before applying the epoxy floor coat.
...
The right primer will guarantee better adhesion of your floor coats to the substrate.
It will give your floor a longer life and will reduce the risk of the coat chipping or breaking..

Inanc Gumus
GuestDo I need to prime concrete floor before leveling?
It is recommended that the concrete surface is primed with a primer before applying the leveling compound.
This is meant not only to improve adhesion with the leveling compound but also to serve to seal the concrete slab beneath..

Rishabh Kumar Singh
GuestDo I need to prime plaster before painting?
You first need to seal new plaster to make it less absorbent and to help the topcoat adhere better. A common way to seal it is with watered-down emulsion (known as a mist coat), as the plaster sucks up the water and becomes less absorbent.

JB Nizet
GuestDo I need to prime plaster walls before painting?
Painting plaster walls is just like painting any other drywall. The primer that you use is the key. You need to us the best primer for plaster walls to seal the wall because paints won't take to it evenly without a good primer.

Jay McDoniel
GuestDo I need to PVA plaster before tiling?
Short answer. No, never use PVA to prime a surface before applying tiles. The acetic acid produced when cement and PVA come into contact would render the adhesive and grout useless. Scroll down for a longer answer!

John J Smith
GuestDo I need to remove old plaster before plastering?
Plastering Over Old Plasterwork If you want your plasterer to apply a fresh skim coat to old plaster walls, you will need to prepare your walls. Any damaged and crumbling old plaster will need to come off the walls, before the brickwork beneath is cleaned off.

Hong Ooi
GuestDo I need to sand concrete before painting?
Before you start, remove any loose or peeling paint by sanding with medium-grit sandpaper or wire-brushing the surface. If necessary, de-gloss any glossy surfaces by scuff-sanding or using a chemical deglosser. For your safety, wear protective clothing, eye goggles and acid-resistant rubber gloves and footwear.

Alan Gutierrez
GuestDo I need to sand concrete before staining?
You do not need to sand the concrete before staining unless you are using Acid Stains and the surface to be acid stained is not capable of absorbing liquids..

hadley
GuestDo I need to seal concrete before epoxy?
New slabs of concrete should be allowed to fully cure for 30-60 days before a coating is applied.
If a sealer was previously used on the concrete (if water beads up on the surface), do not use epoxy.
...
Any cracks or concrete spall should be filled and stabilized before a new epoxy coating is applied..

Farhana Naaz Ansari
GuestDo I need to seal concrete before painting?
For a clean and even coat of paint, your concrete surface will need to be thoroughly cleaned before primer is applied. This is because concrete is a highly absorptive surface and without a seal, moisture can seep inside through concrete.

snakecharmerb
GuestDo I need to seal old plaster before painting?
Fix damaged areas of the walls with a patching compound recommended for use on plaster and apply an oil-based or shellac primer to seal out moisture. Follow with a top-quality latex paint to give your old plaster a new look. Move the furniture to the center of the room. Cover the floor with drop cloths.

Pranav Singh
GuestDo I need to seal plaster before painting?
1. Seal it. You first need to seal new plaster to make it less absorbent and to help the topcoat adhere better. A common way to seal it is with watered-down emulsion (known as a mist coat), as the plaster sucks up the water and becomes less absorbent.

jcuenod
GuestDo I need to wash concrete before painting?
In most cases, special cleaning and/or etching of the concrete surface will be required before painting, and the appropriate cleaner (often TSP, trisodium phosphate) and etcher (usually a solution of muriatic acid) can be obtained.

Ines Montani
GuestDo you have to prime plaster before painting?
As a rule, plastered surfaces do not need priming or applying an enamel undercoater. Two coats of a latex ceiling paint or latex wall paint are all that is needed. Be sure they are thin coats.

Lord
GuestDo you have to prime plaster before tiling?
If your wall has been plastered recently, make sure it has been left for at least 14 days before tiling on new plaster. If this isn't necessary, a coating of sealing primer directly on the plaster will ensure a decent base, just make sure you give it 24 hours to dry.

BatyrCan
GuestDo you have to seal plaster before painting?
You first need to seal new plaster to make it less absorbent and to help the topcoat adhere better. A common way to seal it is with watered-down emulsion (known as a mist coat), as the plaster sucks up the water and becomes less absorbent.

grokus
GuestDo you need to prime old plaster before painting?
Old plaster walls are more temperamental than drywall so you have to put a little more elbow grease into the preparation work before you paint. Fix damaged areas of the walls with a patching compound recommended for use on plaster and apply an oil-based or shellac primer to seal out moisture.

ForestG
GuestDo you need to prime plaster walls before painting?
Painting plaster walls is just like painting any other drywall. The primer that you use is the key. You need to us the best primer for plaster walls to seal the wall because paints won't take to it evenly without a good primer.

Hristo
GuestDo you need to seal old plaster before painting?
4 Answers. You do need to seal the plaster otherwise the new paint won't stick as you point out. My first choice would be to wipe down and then paint with a coat of diluted emulsion as you suggest. You might want to try this on a section of the wall before doing the whole lot to see if you get a good finish.

paxdiablo
GuestDo you need to seal plaster before tiling?
Yes, the plaster needs to be sealed as it is very porous and will suck the moisture out of the tile adhesive before it has time to 'grab' properly.

AraK
GuestDo you need to wash new plaster before painting?
Fresh plaster is extremely porous, and any moisture will be quickly absorbed into the wall. This is why you need to water down your first paint layer (known as a mist coat). Fresh plaster needs to be able to breath underneath the paint to allow any moisture to escape, so make sure to use a non-vinyl water-based paint.

Ryan
GuestDo you need to wipe down new plaster before painting?
One of the most common questions that arise about plastering and painting is how long you have to wait before painting new plaster. Above all, recently plastered walls should be left to dry thoroughly before any painting begins. The time you should wait before painting new plaster depends on several factors.19 Aug 2019

sth
GuestDoes new plaster need sealing before painting?
Newly plastered walls/ceilings always need to be suitably sealed before painting begins (otherwise the paint will sit on the surface & come off very easily). If the plasterer has 'over polished' the walls, this latter option will be the best, as the plaster will not allow the mist coat to seep in & adhere properly.

Matthias
GuestHow do you lay porcelain tile on a concrete patio?
Clean the concrete slab thoroughly before laying tile. Apply a waterproofing membrane, such as RedGard, to the slab before tiling. Use a polymer-modified, dry-set mortar adhesive that's rated for outdoor use. Cover the slab completely with the tile adhesive, and apply it to the back of the tiles as well.

justin
GuestHow do you prepare plaster walls for tiling?
How to prepare for tiling a wall:
- Remove old fittings, such as pins, screws, rivets etc.
- Repair or remove unfit plaster.
- Get rid of or pre-treat wallpaper (if present)
- Repair any cracks or signs of damage.
- Level the surface.
- Sand, so that the adhesive can bond.
- Make sure the surface is dust, dirt and grease-free.

vacawama
GuestDo I need to remove paint from concrete before tiling?
Painted concrete surfaces are a well known bondbreaker for all tile thinsets and self levelling compounds and must be removed prior to installing tile.

ɢʀᴜɴᴛ
GuestShould I plaster before fitting kitchen?
Its easier in the long run to plaster before the kitchen goes in, even though some areas might be covered with the units. But if this is not possible,it can be plastered afterwards, but you would need to take great care not to damage the units.

Raja Rama Mohan Thavalam
GuestHow do I attach concrete board to plywood?
Position each piece of backer board in the thin-set, press in place, and attach using special backer board screws on the spacing recommended by the backer board manufacturer.
Cover the joints in the backer board with fiberglass tape embedded in thin-set adhesive and allow to set before tiling..

Mike McKerns
GuestCan I plaster over caulk?
I would not attempt to plaster over caulk. If I were doing this I would just scim to the beam. If the joint is excessive use scrim cloth to fill before scimming. Over time the oak will expand / contract depending on temperature and humidity.

Elazar
GuestCan I plaster over tiles bathroom?
Applying plaster over tiles Sometimes, you may want to plaster bathroom walls over existing tiles. In this case, you need to fill the gaps between the tiles to create a uniform, flat surface. To do this, you should cover the tiled wall with a non-shrinking, adherent substrate plaster.

solaimuruganv
GuestCan you plaster over decorators caulk?
I would not attempt to plaster over caulk. If I were doing this I would just scim to the beam. If the joint is excessive use scrim cloth to fill before scimming. Over time the oak will expand / contract depending on temperature and humidity.

Ian Vink
GuestDo I need to seal a concrete floor before tiling?
7. Apply the Sealer. After cleaning, patching, and repairing the concrete floor, you'll be ready to seal it. This process creates a protective layer that prevents moisture from seeping through the concrete and into the tile floor.