How soon can you paint rendered walls?

Asked By: Rachael Serrat | Last Updated: 19th January, 2020
Category: hobbies and interests painting
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So, it always best to leave new render a few days before painting is started, maybe longer in the colder and wetter months of the year. Before painting starts, make sure you have all the right tools and equipment needed to paint.

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In respect to this, how long should you wait before painting a rendered wall?

Bare masonry, bricks and cement sheeting Cement render, concrete bricks and mortar must be allowed to cure for a minimum of four weeks, and concrete for a minimum of 8 weeks, before painting with an acrylic paint. If you plan to use an oil-based paint, even longer is required.

Also, can I paint over render? A fresh coat of membrane paint or paint over existing sponged render or texture will not change the textured appearance of the surface.

Accordingly, does a rendered wall need painting?

Painting render. Before painting any wall that has been rendered you have to ensure that it is clean and has been treated with a suitable fungicide before you start to paint the wall. For newly rendered walls it is also essential to make certain that the wall had dried out fully before painting.

What is the best paint for rendered walls?

Silicone Paint is a breathable, hydrophobic topcoat finish which is great for applying over the top of an existing render as you would a normal masonry paint.

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Is render waterproof?

It is incredibly waterproof, which means that water is repelled from the surface of the render rather than being absorbed into the material. When water hits the surface, it forms droplets that roll straight off.

Can you use emulsion on render?

It's really essential that you do use the right paint, a water-based matt emulsion such as this one is ideal. Don't be disheartened if your paintwork looks patchy at this stage, remember you're just sealing the render so you can then paint on to it properly.

Can you leave render unpainted?

Yes. In fact, unpainted is preferable. Better still, use a through-coloured render.

Does rendering a house add value?


Rendering can be an expensive process on larger homes, so be sure to do your research about what your home will be worth once the rendering and the rest of your renovation is completed. Spending $15,000 on rendering your home may only increase its value by a fraction of that!

Do I need to seal a newly rendered wall?

Modern paints are excellent and don't need any pre-work. Sandtex is expensive but you will only need one coat, many other brands will require two or more coats. In addition it is always a good idea to seal the edges of the render where it meets the windows, will also make painting the edges easier.

How do you seal new plaster before painting?

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.

Can you paint over acrylic render?

Acrylic render is designed to be applied to most surfaces such as painted masonry, uneven concrete, brick, fibre cement and plasterboard. Acrylic render can be tinted to the colour you are going to paint your wall allowing for one less coat of paint.

What is Stabilising primer?

Dulux Trade Weathershield Stabilising Primer is a solvent-based primer specially formulated to seal unstable areas which remain powdery and chalky after the surface has been thoroughly prepared for painting with Weathershield Masonry Paints.

Can you're render over render?


1. Existing renders are often finished with a thin coating or paint which will form a weak interface which is not suitable for rendering over. Dirty deposits accumulated over a period of time can form a weak intermediate layer that interferes with the development of the bond of newly applied render.

Can you water down Sandtex masonry paint?

A common reason water is added to masonry paint is to dilute the paint for the first coat. Some types of render will absorb water, so adding a little water to the paint can help to prime the render and prepare your walls for painting.

What is sandtex paint?

With microseal technology, our masonry paint ensures that surfaces are dirt resistant, breathable and waterproof – meaning that homes have have flawless coverage and protection for longer. With 15 years proven durability and a wide range of masonry paint colours, Sandtex offers perfect protection for homes.

What is weather shield paint?

Weathershield is a specialist range of paint for exterior masonry, wood and metal that uses advanced technology to help withstand the elements, so your paint will look better for longer.

How long does a rendered wall last?

So how long does each type of render last? With the modern acrylic or plastic-based renders, expect a job to last from anywhere between 20 to 40 years. This can depend on the smoothness of the job and how clean the walls were prior to its application.

Can you paint rendered wall?


If rendered walls have been painted, the paint will bubble as the moisture from the bricks and mortar tries to exit. The most extreme cases occur when the rendered wall has been built as a retaining wall, holding soil on one side. Walls that are prone to moisture should be treated before any painting is done.

How often should you paint a rendered house?

Most experts say that you'll need to paint every five to ten years, depending on factors such as where you live, climate and weather, and the previous paint job. Also, keep in mind that every surface will be a little different. For example: Wood siding - every 3-7 years, or every 4 years if it's stained.

Does rendering improve insulation?

Rendering your property will provide a slight insulating effect of its own, but if you are rendering, it is a great time to consider full external insulation.