What do you put on new plaster before tiling?

Asked By: Elsbeth Turetta | Last Updated: 3rd February, 2020
Category: home and garden interior decorating
4/5 (380 Views . 10 Votes)
Make sure you install a layer of cement board, so the area is completely waterproof and secure. 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.

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Subsequently, one may also ask, do you need to plaster 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.

Additionally, do 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.

Secondly, how do you seal a wall before tiling?

PVA can be used to seal any type of porous surface,including plasterboard and if it is done properly it will give you a much much better job than working on unsealed walls. To seal a wall the PVA should be dilted at about 20 - 25% PVA to 80 - 75% water.

How long after skimming can you tile?

Ideally leave new plaster (bonding plus finish) 4 weeks to dry before tiling. Dot and dab plasterboard with plaster skim can be tiled in 24/36 hours. If you don't skim the plasterboard you can tile it immediately but prime it first with an acrylic primer like BAL APD or SBR.

36 Related Question Answers Found

Do you paint before or after tiling?

The answer to the question is, “do the floors first!” Here's why: Removing and replacing flooring or carpeting is dirty work. If you paint first, and then do floors, there is a good chance that a lot of dirt, dust, sawdust or tile/stone dust will end up on your freshly painted walls and trim.

How do you seal new plaster in a bathroom?

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. After you've applied the mist coat, you'll be able to see where you need to fill more easily than you would with bare plaster.

Do you need to seal walls before tiling?

DO NOT use standard PVA before tiling; it remains water soluble, can give problems with adhesion & if used in a wet area, your tiles may well end up on the floor. If you need to prime use an SBR based primer but always follow the tile adhesive manufacturer's instructions.

Do I need to use primer before tiling?

Priming of your substrate prior to tiling is recommended in many instances. Most manufacturers now recommend use of a primer on wood, concrete, plaster, plasterboard, etc. prior to tiling. This will promote bonding for the tile adhesive and prevent potential issues with overly porous or non-porous surfaces.

Can u tile over plaster?


You may tile over existing tile, painted or unpainted drywall, plaster and textured walls. However, tiling over tile can add quite a bit of thickness, so make sure your wall can handle the weight. You should not tile over wallpaper, glossy surfaces, lead paint or plywood.

How do you tile over plaster?

The surface of a plaster wall is too smooth for the cement to grip to. A glue adhesive works better for installing tile over plaster. Some products are designed specifically for use between tile and plaster walls, but any tile setting adhesive designed for thin-set use will work.

When can you paint new plaster?

No matter what material you have used, it is advisable to wait at least a week before painting new plaster. Sometimes it may even take up to a month for the fresh plaster to be completely dry. You should ensure that there are no dark patches on your freshly plastered surface before you attempt to paint it.

Do you need to plaster after removing tiles?

9 Answers from MyBuilder Plasterers
Yes. Even if the tiles come off easily,what you will be left with will hardly be suitable for a paint finish. Its very unusual for tiles and adhesive to come off and leave a good,clean surface that only requires a bit of prep.

Does plasterboard have to be skimmed?

The stud partition walls, and often the inner faces of the outside walls too, are lined with plasterboard, but this is not skimmed with plaster. As you have discovered, plasterboard is very absorbent (so care should be taken not to get it too wet, lest it loses strength), so it has to be sealed.

Should I skim plasterboard before tiling?


The weight of tiling (including adhesive and grout) to a plasterboard background direct (without plaster skim) should not exceed a maximum weight of 32kg per m2 – the maximum weight for plasterboard with skim is only 20kg/m2 – so it is advised to tile direct to plasterboard.

Can you tile directly onto plywood?

While tile can be laid on plywood, do not install tile directly onto the plywood subfloor itself. Use intervening layers of two sheets of plywood.

Can you tile directly on drywall?

Sheetrock, or drywall, is no different for tiling over than wood, plaster, cement, or other wall materials. If you are tiling an area that is not in a bathroom, tiles can be applied directly to the sheetrock simply and easily. The wall has to simply be prepared in order to complete this task properly.

Can you tile directly onto concrete blocks?

ANSWER - Yes you can install ceramic tile over CMU (concrete masonry unit) blocks. You need to properly prepare it to make sure it is free of any structural cracks, clean, and plumb. You can bond the tile directly to it or you can fasten metal lath and apply a scratch and brown coat of mortar.

Can I tile on a skimmed wall?

A plastered wall must be at least four weeks old prior to tiling to ensure adequate strength build up and suitable dryness. Weak or friable plaster should not be tiled onto. Densely finished, polished or shiny plaster should be 'roughened' up to provide a good mechanical key. A stiff bristle brush should be used.

What surfaces can you tile on?


  • Wall tiles can be applied over a range of surfaces, including plasterboard, fibre cement board, plywood, solid plaster, brick or blockwork.
  • You may need to make some 50mm wide support strips from straight timber to use as guides and supports to hold up the tiles until the adhesive sets.

What should I prime my walls with before tiling?

You must prime gypsum plaster with an acrylic primer or SBR primer, however you state that you are planning on fixing natural stone which exceeds the weight limit for skimmed plaster. You will need to either remove the plaster / render to block/ brick and/ or fix tile backer board and tile onto this.

Can you tile on bare plasterboard?

Can you tile on moisture resistant plasterboard? Yes, it is possible to tile directly to our Gyproc moisture resistant (MR) grade boards without any pre-treatment.