Can i paint over wet plaster: How To Paint New Plaster

How To Paint New Plaster

You can’t start painting new plaster directly and instead have to take steps to seal the plaster so you can get the colourful finish you want.

What you’ll need

Emulsion for the mist coat
Water
Dust sheets
Decorator’s tape or masking tape
Topcoat paint
Paintbrush or roller

1. Let the plaster dry

The very first thing you need to do when painting new plaster is to let it dry. A week should be long enough to let it completely dry out and for all damp patches to disappear. Once the plaster is dry it should be light with no dark spots and a consistent colour and appearance throughout.

Your plaster will dry quicker with a heater or if you open a window.

If you try to apply paint to wet plaster this can cause adhesion problems. Applying emulsion to wet plaster also means that it may not bond properly and you could find that it peels off your wall.

Painting on dried plaster can also cause the paint to dry very fast, leaving you with irregular brush strokes and an uneven finish. So to combat this, you need to apply a mist coat.

While the plaster is drying, put down dust sheets and use your tape to protect any fixtures and fittings – applying a mist coat can be very messy!

2. Mix a mist coat

A mist coat is made of watered-down emulsion paint and acts as a primer. The extra moisture gives the wall something to absorb so your topcoat should stick. Alternatively, you can use a water-based primer which saves you the mess of making a mist coat. All our primers are water-based and will help you achieve an even and colourful finish.

To make a mist coat, mix three parts emulsion with one part water. You should always check the paint tin for the manufacturer’s instructions as ratios can vary.

You don’t have to use exactly the same paint you’ve chosen for the final topcoat but you should use a similar colour for an even finish.

The mist coat will be completely mixed together when the water isn’t settling on the surface of the emulsion.

3. Apply the mist coat and let it dry

There are two different ways you can apply the mist coat.

If you choose to use a roller, you’ll cover the wall much quicker but it will be very messy as rollers can splatter paint very easily.

Alternatively, a paintbrush will take much longer but you shouldn’t have as many drips to deal with.

However, you choose to apply the coat, work in smooth upward motions until you cover the entire wall. The mist coat is very runny so whenever you spot drips or streaks, paint over them quickly to prevent them from drying and ruining your perfect finish.

Wait 24 hours for your mist coat to dry before you apply the topcoat.

4. Apply the topcoat

As soon as your mist coat has dried you can decorate normally. There’s no need to sand down the wall as you’ve already done all the prep, so this bit is easy.

Apply the topcoat in a V motion for even coverage. For the best results, you may need to apply more than one coat. To find out how to paint your walls like a professional, have a look at our guide.

Paint over wet plaster – MyBuilder

I recently had a pantry wall plastered and the builder painted part of the wall before it was dry he said you could .it didn’t dry out so I scrapped off the paint but it’s still not drying out what can I do ?

4 Answers from MyBuilder Plasterers

Best Answer

Timothy David Interiors

Tonypandy • Member since 24 Jul 2017 •

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Hi. there is a difference between ‘can do’ and ‘should not be done’

In your builders opinion he has painted damp plaster with contract matt ( i imagine),the ‘can do’ is that it will allow moisture in the plaster to escape.

The ‘should not be done’ is that should only be a very small amount of moisture residue, not damp plaster that is still drying.

It is poor practice from him and i’m pretty sure he will know this

2019-10-04T10:00:02+01:00

Answered 4th Oct 2019

KRM CONSTRUCTION

Rhyl • Member since 23 Nov 2015 •

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How long as the plaster been damp ? And is at low level ? Its ok plastering an old pantry wall but was the damp course in good condition? If hes plastered over a damp wall its not going to dry out . Don’t re paint it and if its still not dry in a week get him back to take a look at it .

2019-10-04T17:25:02+01:00

Answered 4th Oct 2019

mjplastering

Worcester • Member since 20 Feb 2018 •

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I personally would never paint the plastered wall until its completely dry as it needs to expel the moisture in the wall first.i also wouldnt use contract matt without thinning it down first as the new plaster will suck the water out of the water based paint and make the paint flake and peel off.here are the steps i would take One. Wait until plaster is fully dried Two use either a new plaster paint or matt emulsion thinned down to 50% paint 50%water and thoroughly mix together and then mist coated over the wall. Three once dried apply two normal coats of a breathable paint to finish.

It sounds like the builder rushed the job to get it finished and took short cuts .

Regards Mark

2019-10-13T16:30:02+01:00

Answered 13th Oct 2019

AC Roughcast & Plastering Services

Cumbernauld • Member since 9 Nov 2017 •
No feedback yet

Plasterer was very wrong to do that ,now paint is on the plaster didn’t get to dry normally , this keeping moisture in ,you need to put a small heater in cupboard or facing cupboard for a few hours this will dry the plaster,then leave for 1 day , without the heat and then pbr (polybond) walls and put a scim coat of finish plaster on that should be fine

2019-10-10T17:30:03+01:00

Answered 10th Oct 2019

which washable moisture resistant paint to choose

Finishing work requires many stages of work, often plastering the wall is carried out to get a perfectly even base, ready for any finishing materials. One easy option that will look just as good as the other options is painting over stucco. To get a beautiful coating, you need to carefully consider the choice of paint and varnish. More details about the types of paints and features of the work will be described later.

Stucco paint – why is it needed, features

Wall painting has been a popular finishing option since ancient times. After all, this method is easy to implement, does not require a lot of effort and skills. Coloring agents help to obtain a beautiful coating, which can also create a protective layer from various factors.

The variety of presented types of paint and varnish products makes it possible to find a suitable option without difficulty. But it is important to understand that only a well-leveled base is suitable for applying paint, the plaster layer must be flawless, otherwise the paint for the walls under the plaster will emphasize all the shortcomings.

The following paint requirements must be taken into account to select the appropriate type:

Abrasion-resistant property so that the coating can withstand the environment and retain its qualities for a long time;
Moisture resistant property important in damp rooms;
Long-term color retention, the quality of the pigments is important here;
Safe for human health, should not emit harmful substances;
Vapor permeable property to allow air to pass freely through the coatings, preventing the formation of mold and mildew.

Coloring agents help to obtain a beautiful coating, which can also create a protective layer from various factors.

Varieties of paints for plaster work, advantages and disadvantages

Paints for plaster for interior work in the construction market are presented in large quantities. But you should not buy the first one that comes across, it is necessary when choosing to take into account the features of the apartment, the wishes of the residents in terms of external design. Below is a description of the types of paints and varnishes that can be used for painting indoors.

Interior plaster paints are available in large quantities on the construction market.

Water-based paint

Water-based paints are popular, they are environmentally friendly, so they can be applied indoors safely. They create a matte finish, but the color palette is not rich, the use of colors corrects this defect, you can get any shade with them.

Can be used on all types of substrates, easy to apply. However, it does not withstand moisture, so it is only suitable for dry rooms. To get the best adhesion, the stage of priming the walls is preliminarily carried out.

Can be used on all types of substrates, easy to apply.

Washable Acrylic Paint

Washable Acrylic Paint for Interior Plastering, suitable for damp rooms. The following characteristic characteristics of the composition stand out:

Withstands moisture, which makes it possible to wash the surface with wet rags, this process will not reduce the brightness of the color;
It is possible to add colors to get the desired shade. That allows you to implement any design solutions;
Creates a matte finish;
Strength properties are high;
Ease of work;
Long lasting result;
High elasticity.

When carrying out work, make sure that the walls are completely dry, the acrylic base does not release moisture.

Washable acrylic interior plaster paint suitable for damp rooms.

Silicate paint

Silicate plaster paint is created using liquid glass, pigments and fillers. If the painting was carried out according to the rules of work, then such a coating will last 10-15 years. It has a vapor permeable property, stands out with a good degree of resistance to ultraviolet radiation. Mold and fungus will not form on the wall.

However, the product also has its downsides. One of them is a low elasticity index, which can lead to cracks on the surface. Not suitable for any base, does not combine with organic elements. High temperatures can cause the layer to warp.

Possesses a vapor permeable property, stands out with a good degree of resistance to ultraviolet radiation.

Silicone paint

Silicone paint is based on silicone resins. They help to get a porous texture on the surface, unlike other types that create a film. This allows you to get a vapor-permeable effect, protecting against biological formations.

Despite being vapor permeable, it creates a moisture resistant coating that can be washed if necessary. The surface does not attract dust, which is definitely a plus. The coloring of the plaster makes it possible to close the existing defects up to 2 millimeters. It has a high level of adhesion. However, the price of the products is high.

The surface does not attract dust, which is definitely a plus.

Alkyd and oil paints

These types create a durable and wear-resistant coating that is resistant to mechanical stress. They can be washed, the colors are bright, but the color palette is not large. They serve for a long time, can be used in rooms with high humidity. Get the effect of gloss on the walls. However, they have an unpleasant odor when applied, the consumption of material is large, and the ease of ignition.

These types create a durable and wear-resistant coating that is resistant to mechanical stress.

The subtleties of choosing products for interior work

When choosing a paintwork material, it is necessary to take into account the purpose of the room. This parameter should be the key when choosing.

For the hallway and kitchen, moisture-resistant property is important, and the possibility of washing the surface, as well as resistance to various mechanical influences.

For hallways and kitchens, moisture resistance is important.

For children, the main thing is the environmental component, and the opportunity to wash the walls will not hurt, because children often stain various surfaces. The vapor-permeable effect is necessary for the bedroom and the nursery, it helps to create good microclimatic conditions.

For children, the main thing is the environmental component.

Ceiling cover requires low dust attraction and washability.

When plastering work has not yet been carried out, then you can think about choosing the plaster itself. For example, decorative plaster decorative paint is on sale, it makes it possible to obtain a textured coating that will look original and decorate the interior of the room.

Decorative plaster makes it possible to obtain a textured coating that will look original and decorate the interior of the room.

Staining method for different types of surface

The most common types of products that are used to plaster walls are cement and gypsum, they can be mixed. To obtain the desired result after painting the surface, the following work steps should be followed:

Begin with an assessment of the surface condition, if necessary, the surface is cleaned, existing defects are removed, putty can be applied. The cleanliness of the wall is important, because any extra details will be visible through the painted coating;
Dust is removed with a brush or roller, then the surface is primed, this stage will help reduce the consumption of the coloring agent, as well as increase adhesion;
Paint application tools can be brushes, rollers or spray guns. The choice should be made based on the experience of the master, his preferences and the type of paint, not everyone can be used with a spray gun. The data can be found in the manufacturer’s instructions. Usually, hard-to-reach places and corners are treated with brushes, and they work with a roller along the rest of the wall;
Based on the type of paint, it is prepared for use. Some species are diluted with solvents to obtain the required density. If a basic white color is purchased, then the color is first added, it must be introduced gradually, checking what color is obtained, you can test in an inconspicuous place to make sure that the desired shade is obtained. All breeding is carried out strictly according to the manufacturer’s recommendations;
When working with a roller, the movements are made from top to bottom. Usually 2-3 coats are required, each of which must dry before applying the next. The spray gun should be at a certain distance from the wall, usually 20-30 centimeters. It is also recommended, in the absence of experience, to test its operation on an inconspicuous section of the wall.

Objects in the room and floors are covered with plastic wrap so as not to be painted.

Usually 2-3 coats are required, each one must dry before applying the next.

How to calculate the consumption

The first step when calculating the area of a room is to multiply the measured lengths and heights of each wall, they add up. After they find out the area of \u200b\u200bwindows and doors, in a similar way. This figure will need to be subtracted from the area of \u200b\u200bthe room, if they were taken into account in it.

The average consumption of each product may vary, so you need to know it, it is always written on the packaging. This figure is multiplied with the area of \u200b\u200bthe room. As a result, they get a figure in kilograms, how much paint is needed for coloring.

However, the average does not take into account some factors, it is considered for ideal conditions. They imply priming the surface, the plaster itself requires a larger amount of mortar, its impregnation is higher. Therefore, it is recommended to carry out preliminary priming before painting.

The number of layers must also be taken into account when calculating, each new layer usually requires less paint.

The first step in calculating the area of a room is to multiply the measured lengths and heights of each wall, they add up.

Stucco painting can be an excellent wall decoration option, it is bright and aesthetically pleasing. There are many types of paint and varnish products for interior work; when choosing, it is important to focus on the type of room that is going to be painted. The article described in detail the available types of products, this should help determine the appropriate option for finishing a particular room. The work itself is simple, it is important to properly prepare the surface, because the paint emphasizes any flaws.

Video: How to quickly and easily paint walls for a beginner

Paints and primers for wet facades, price

Paint for facades on plaster is used not only as a decorative coating that adorns the walls of the facade. Also, its task is to protect the walls of the house from destructive environmental factors, for example, wind, rain, temperature changes, sun rays, pollution. As you know, wet facades of those houses that are located near industrial plants or roads are more susceptible to pollution.

How to avoid cracks in the facade after painting?

In most cases, after painting work, the paint on the facade becomes covered with cracks after a while, begins to peel off and fly off. The point here is not at all that you have purchased bad paint for the plaster facade, but that the technology for preparing and painting the walls has been violated.

The most common errors that lead to such consequences are:

Facade wall defects not repaired or not removed.
The base preparation technology is broken. Perhaps the plaster was made without reinforcing mesh.
Using the wrong type of paint on plaster.
Painting work was carried out on wet plaster or putty.
In some cases, the use of low-quality paint.

What are plaster facade paints made of?

All wet facade paints are made from 3 components, namely: film-forming (binder) substance, pigment and carrier. The film-forming agent may be a natural or synthetic compound. This substance allows the paint on the plaster to adhere firmly to the base.

Pigment is the color of the paint, and the carrier can be water (in most cases) or a solvent. When choosing paintwork materials, remember that paints that are intended for outdoor use should be used for the plaster facade. Paint on plaster should be characterized by resistance to environmental influences, have good heat resistance, high vapor permeability and water repellency. In addition, facade paints for plaster must be resistant to chemical pollution and abrasion, and be characterized by good hiding power.

Plaster paints can be based on an organic or inorganic binder. Note that in organic paints, the binder is made of a polymer.