Common Problems with Painting Concrete Walls

Painting concrete walls can result in a few problems if the concrete wall has not cured. If the concrete cannot adequately cure before it is painted, the paint will trap the excess moisture within the concrete and the paint can peel some of the cement as it peels itself. Painting the concrete wall can also cause the plaster to not receive the water cure that it needs.

common problems

Cracks in the Wall

Before priming the wall, cracks in the concrete should be filled with a material that can withstand weather effects. If the wall plaster has a texture, then sealant should be of a matching texture. If it is not, bands of smooth surface can be seen through every coat of paint in a different contrast.

Coverage

If primer and paint is applied, it needs to be applied across the whole surface in order to have the best results. Once the primer has been applied and allowed to cure, the finish coat needs to be laid on in several thick coats. If not, the uniform color will not be attained and you will not achieve the look that is desired. Some projects do not have primer applied before the paint. Other projects may have had paint thinned so much that the coat is not even effective. This makes the wall look like it did not receive adequate coating.

Primer

In order to get the bond desired, the right primer will need to be applied to new concrete walls. This will prevent paint delamination also. There are some paints and primers in particular that needwall painting to be used together. Although cement plaster and concrete should have a coat of primer before the paint is applied, painters do not always prime concrete and plaster.

Delamination

Delamination is the process of paint peeling from a new concrete surface or cement plaster. Paint will delaminate from concrete just as it does from wood and metal. This is why the concrete wall needs to be well prepared and all application procedures need to be followed. Moisture from rain or from the concrete not curing will release from the concrete and cause cleaving.

Over Brushing the Paint

If a painter applies paint to the brown coat on cement plaster, the paint will serve as a bond breaker causing delamination. Plaster behind a coat of paint will turn soft if paint is not allowed to cure. Paint will keep the water from evaporating properly. Concrete walls need to be prepped and primed. Paint needs to be thick and not diluted.

Please contact Country Wide Walling for a free quotation today

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What Paints Can You Use on Concrete?

paints can use concrete

Though you can use any paint onplaster primer concrete, some kinds prove better suited for certain types of concrete surfaces. Learn which finishes will prove most resilient on concrete floors, statues and walls, or finish failure will prove possible. Learn how to condition the concrete for adhesion, or no type of paint will prove durable in the long run.

Concrete Walls

  • Ordinary latex paint is well-suited for interior concrete walls. Use an eggshell or satin latex paint on concrete walls that aren't exposed to much duress. For concrete walls within weight rooms, work rooms and kids' play rooms, choose a semi-gloss latex paint that will resist stains. If you plan to paint exterior concrete walls and fences, use an exterior acrylic paint that will hold up to ultraviolet light and harsh weather conditions.

Considerations

  • No type of paint will adhere to improperly-prepared concrete. Prime vertical concrete surfaces, or the paint will eventually chip. Use a latex primer on interior walls; use an acrylic primer on exterior walls. Smooth horizontal concrete surfaces do not require a primer; however, they will reject paint unless they are treated with an acid etch.

Contact Country Wide Walling today for a free quotation or more information.

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Enamel or acrylic paint?

Plascon Multi Surface PrimerThis topic has bothered me for many years and I have never managed to find a helpful answer. If I’m coating a previously painted surface, how do I know what type of paint was used. I assume it is important to know because water-based and oil-based paints are very different.

1.    Is it possible to ‘prime’ an existing oil-based paint with universal undercoat and apply water-based paint over     this? I prefer to use water-based paints because cleaning the brushes and rollers after use is so much easier.
2.    Is there an advantage to using enamel over water-based paints?

A Toni Stella the Paint Fella replies: 

Determining whether the surface was painted with a acrylic or oil-based paint is very important.

Testing for an oil base:
•    Soak a cotton wool ball or very soft cloth in methylated spirits, alcohol or lacquer thinners and rub it back and forth over the area.
•    If the paint rubs off (dissolves) and you see the other colour below, you know it’s a acrylic product.
•    If no paint is removed, it’s an oil-based paint.multi surface primer
Oil-based enamels can sometimes be painted directly over acrylic (however, it is not acceptable industry practice). Special preparation is needed to cover oil-based paint with acrylic.

Covering oil-based enamels with acrylic:
•    Surfaces previously painted with oil-based enamels must be abraded with a Scotch-Brite pad and a solution of sugar and soap.
•    Rinse with clean running water and repeat until a matt surface is achieved.
•    Apply a coat of Plascon Multi-Surface Primer and allow it to dry for four hours at 23˚C.
•    Apply the final coat of acrylic paint.
•    Your brushes and tools can be cleaned with water.

For a free quotation, please contact Country Wide Walling today

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1121 Hits

Best Kind of Paint to Use on Concrete

bestconcretepaint

As mediums for painting go, concrete is not one of the better ones. It transfers moisture from the ground or surrounding dirt, and it breathes and sucks up paint like a kid with a soda. Concrete requires special paint that contains binders that contract and expand right along with the surface.

Do not use oil-based or acrylic house paints on concrete or you’ll just have to paint it all over again, because acrylic paints peel, crack and just can’t take the abuse that concrete patios, sidewalks and driveways undergo.

For more information and a free quoatation, please contact Country Wide Walling today.

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How to paint a fence with a roller

painted pallisadeThe Process

  1. Wash the fence with a power washer to remove dirt and grit, and give the fence time to dry.
  2. Lay down a tarp in the area where you'll be staining the fence.
  3. Shake the can of stain, then open the can and stir it thoroughly.
  4. Pour the stain into the paint tray and dip the larger roller into the stain.

When to use a spray spray paintinggun?

When should I use a normal paintbrush for painting, and when should I consider using a spray gun? Why is it better to paint a palisade fence with a brush than with a spray gun?
Brett van Rooyen, Centurion

Our technical consultant, replies:

When using a spray gun there is a thing called ‘overspray’, so when painting thin materials like palisade fencing, the amount of paint that you lose is great. But, on the other hand, the finish will be of higher quality; a lot smoother and with no brush marks.

When using a paintbrush on palisade fencing the coat is a lot thicker than when using a spray gun. My advice is that if going for the spray gun option, choose a spray gun with an adjustable spray pattern. Also, use a cardboard box behind the fence that you are spraying as this will act as a deflector and will allow some of the overspray to coat the other side of the fence. The cardboard needs to be placed about 5cm behind the fence.

Please contact Country Wide Walling for a free quotation.

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Best Service Ever

We had our Concrete Palisade Fencing Erected by Country Wide Walling in July 2015. Although our fence was only 235m long, we were still treated as if we were one of their top clients. Service, efficiency and cleanliness were a priority for me, and Country Wide Walling delivered in all these aspects. If you want the best concrete palisade fencing company in the industry, then Country Wide Walling is the right fencing company for your walling projects.

WE OFFER YOU:
Direct from factory
2 years guarantee
Our own contractors
Free quotes
Prompt services
Clean site on completion
Job satisfaction
CONTACT US:
TEL: 011 743-2221/2/3/4
EMAIL: cwwreception@yahoo.com
ADDRESS: 7th Street,
Witpoort Estate,
Brakpan, Plot 222,
East Rand, Gauteng,
1540