Painting A Fresh Exterior Render?

This video discusses the process of painting exterior rendered walls, focusing on the best tools and methods for achieving the perfect paint finish. The first step is to choose a solvent-based masonry paint, such as Dulux, which provides a smooth matt finish and excellent adhesion to cement rendering, rough cast, brick, and concrete. The drying process can take up to six weeks, and primer may be needed if the wall surfaces are rough or uneven.

When painting new external render walls, it is important to use highly breathable masonry paint that allows moisture from within the wall to escape without damaging or discoloring the walls. If dealing with a rough or uneven surface, apply Emperor Exterior Primer at a coverage of 5-8m2 per litre, depending on the porosity of the render. Clean the render, repair any damage, apply a primer, and paint the surface.

To ensure an excellent coat on newly rendered exterior walls, start the paint job on a dry and cloudy day to avoid the sun’s glare. Leave new render a few days before painting is started, possibly longer in colder and wetter months. Before painting starts, use a scraper to remove proud render and a wire brush to remove any loose particles from the wall. Do not water any paint down and treat new render similarly to new plaster.

It is best not to paint the render until at least three months after it has dried completely. This will help prevent deterioration of the paint finish on newly rendered walls.

How to prepare an external rendered wall for painting?

To ensure a high-quality finish on your render, it’s crucial to clean it thoroughly and dry it completely. Next, apply a primer, which acts as a superglue to the paint, filling in any gaps or holes for a smoother surface. Skipping the primer could lead to a poor paint finish that needs to be replaced within a year. Choose a primer specifically designed for exterior painting and Mornington’s harsh coastal environment, such as Dulux and Haymes.

Ensure the primer is waterproof and suitable for your local hardware or paint store. Some primers may also have a “flexible membrane” feature, allowing the paint to stretch with the building, reducing the likelihood of hairline cracks appearing in the render over time.

Can I use PVA to seal render before painting?

PVA has the potential to seal surfaces in a manner that may result in structural damage to the building and cause discomfort. To circumvent this issue, it is recommended to brush the surface meticulously with a stiff brush. In the event that the powdery residue persists, it can be stabilized through the application of a solution comprising Earthborn Wall Glaze and water.

How do you clean external render before painting?

Bleach, also known as Sodium Hypochlorite, is a popular and cost-effective solution for cleaning exterior walls, particularly on render. Mixing regular bleach with water at a 1:1 ratio and spraying onto the surface using a pump-up sprayer provides a 2. 5-strength cleaning mix. For stained render, use Green Wash formulated for bleach. Bleach ensures 4-6 times longer cleanerness than pressure washing, and it is essential to keep the solution wet on glass to prevent damage. Compared to pressure washing, bleach is a more effective and cost-effective solution.

Does painting render make it waterproof?

When repairing render, it is crucial to provide it with weather protection to prevent moisture from entering the material. A waterproof exterior coating, such as masonry paint, masonry cream, or masonry sealers, must be highly breathable to prevent moisture build-up and damage, especially in older buildings. Sealers, which are low-breathability products, completely seal a surface, preventing water absorption but also preventing moisture from naturally breathing out.

Masonry cream is a highly breathable clear waterproof coating that creates an invisible layer of protection on exterior walls. It is applied to a gel and absorbs into the material over a couple of hours, chemically bonding to it, making it waterproof the render itself. This advanced form of protection offers complete waterproof protection to render without altering its appearance or breathability.

As an impregnating system, masonry cream must be applied to bare surfaces that have not been previously painted, including bare render, brick, and stone. This ensures that the coating remains breathable and prevents moisture from accumulating and causing damage.

Can I paint straight onto new render?

Render is an external wall plaster applied to bricks to create a smooth, attractive finish on a property’s exterior. It helps protect the property from weathering and provides kerb appeal. There are various types of render available in the UK, including conventional render, which is the standard type and is made mostly of sand and cement. Conventional render is less advanced than other renders, making it less breathable and rigid, which can cause cracks when moisture gets trapped. It is recommended to wait up to 4-6 weeks for the new render to dry, although drying time may vary depending on conditions and the thickness of the render.

What happens if you paint render too early?

When painting new render, it is crucial to ensure it is completely dry and cured before starting the painting process. Overpainting can lead to bubbles, cracking, and mold infestation, which are common issues in Mornington and surrounding Victoria. The render should also be cleaned to prevent poor-quality finishes. Once clean and dry, apply a primer, which makes the paint stick to the render like superglue and fills in any small holes or gaps for a smoother surface. Skipping the primer could result in a poor paint finish that needs to be replaced within a year.

There are several primer options available, including those designed for exterior painting and Mornington’s harsh coastal environment. Trusted brands like Dulux and Haymes offer a range of options, and a good quality primer can be purchased from local hardware or paint stores.

Can you render over old paint?

Paint-covered renders create a weak interface, making them unsuitable for direct rendering. This practice is not in line with good building practice, leading to delamination, crazing, and cracking. To remove paint, use sand blasting, grit blasting, or scabbling, without using chemicals. Ensure all paint is fully removed before applying the new render or applying a decorative finish. Alternatively, consider applying a decorative finish.

Can you paint over one coat render?

Applying a decorative finish, such as paint, over existing render is the preferred method for refreshing its appearance, as it is less damaging and less likely to cause issues with the existing render’s strength, bond, and key. For sound, site-batched renders not manufactured by Weber, they should be checked for suitability and free from anything that may affect the new decorative finish’s adhesion. It is crucial to ensure the existing render is free from loose or friable materials when applying a decorative finish.

How to seal a new render before painting?

Floorseal Stabilising Solution is a primer used to seal and prime rendered walls before painting. It can be applied using a short pile masonry roller, brush, or low pressure pump-up sprayer for very porous renders. This solution is suitable for K-Rend, general monocouche renders, sand and cement render, rough cast render, and pebble dash. Monocouche renders may require painting due to deep staining. In summary, Floorseal Stabilising Solution is a crucial primer for enhancing paint adhesion.

How long before you can paint exterior render?

Before painting a new render, it is crucial to ensure it is touch dry, which can take up to four weeks. Emperor Masonry Paint’s high breathability allows moisture to naturally breathe out over time. However, dark or damp patches should be allowed to dry before applying paint. If you have any further questions, our team of experts is available to assist you. Contact them via email or phone at info@emperorpaint. co. uk or 0161 509 9009. Additionally, shop Emperor Masonry Paint and enjoy free delivery on all orders.

What paint to use on exterior render?

To enhance the exterior of your property, use weatherproof exterior emulsion paint from major brands. Apply three coats of paint for the first time to achieve the best results, as new render can absorb more paint than standard walls. Before applying paint, ensure the entire area is dry and scrape the walls to remove any loose cement nibs. This will help prevent the paint from absorbing more paint than a standard wall.