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What Are The Main Paint Failure Problems And Their Cure?By admin
Friday, 19 October 2018
Whether you are an expert painter or tackling the exterior of your home for the first time, you may find that the painting job doesn’t quite go to plan.
While the right preparation and choice of paint can eliminate almost all paint failure problems, you may still find that you are faced with issues you hadn’t expected.
Understanding why they happen is the first step to towards trying to prevent them. The following list aims to point your painting project in the right direction…
Paint Failure Problem No.1: Alligatoring
Looking a little like the scales of an alligator, this cracking pattern on paint can be caused by a number of factors. These include: using a rigid paint over a more flexible primer, leading to uneven drying times, fluctuating temperature, and the application of the topcoat before the primer has properly dried.
The solution is to remove the old paint by scraping it away, and reprime the area with new primer, before using a replacement paint on the surface. Take care to make sure the wall and the primer have dried completely before you apply the paint on top.
Paint Failure Problem No.2: Bubbling
Paint bubbles occur when there is a discrepancy between the drying time of the paint next to the wall surface, and the wall which is facing the sunlight. It happens most often when the wall is wet or damp, or when there is very hot direct sunlight.
It can also happen if the newly applied paint is exposed to dew or mist, or if it rains soon after application.
This can be fixed by scraping away the bubbles, and allowing the wall beneath to dry out completely. Ensure that all sources of moisture are removed, and then repaint the area, using a primer if needed.
Always choose the highest quality of paint you can find-your property is a valuable investment, and should be treated accordingly
Paint Failure Problem No.3: Chalking
If your paint begins to become chalky, leaving a residue on your fingers, it may simply be due to the normal ageing process of paint.
However, if it is excessive, it could be due to the paint being low quality, or too highly pigmented. It also happens if you have used an interior paint on the exterior of your home.
To remove it, you can rub away as much of the chalk as possible, and rinse with water. When it has dried, and there is no chalk remaining, you can apply a primer and repaint. Don’t use the same paint – choose one that is designed for the outdoors, and better still, choose a hydrophobic paint that is waterproof.
Paint Failure Problem No.4: Flaking
Flaking can start as simple hairline cracks, but they quickly become serious problems with paint peeling and flaking. Often it is caused by low quality paint that fails to adhere to the surface correctly. It can also happen when the paint has been spread too thin.
Drying times are also implicated here, and damp walls and painting in hot conditions all serve to determine the overall result.
The solution is to scrape away the flaky paint, sand the area, and repaint. You may need to take the paint back down to the bare wall to ensure you have a good surface for repainting and to avoid future issues.
Paint Failure Problem No.5: Dirt
Poor quality paint may be likely to become dirty more quickly than high quality paints. This can be caused by rain water, pollution and dust in the air. It is a problem with all paint jobs, but some paints are designed to resist dirt. Gloss paints are more likely to become dirty than flat paints.
The best way to avoid this issue is to use good quality paint in the first place. Hydrophobic paints are an excellent idea as they encourage water to simply run off the surface, taking dirt with it.
However, if your walls are already affected, a simple scrub may be enough to improve how they look. If the wall is stained, you may need to repaint.
If the colour you spent so long choosing has started to fade, it could be due to the fact that the paint is facing direct sunlight, or that you have used the incorrect paint for the project
Paint Failure Problem No.6: Efflorescence
If your brickwork has white patches, it may be caused by efflorescence – the leaching of salt deposits from within the brick, due to it becoming wet. It happens when excess moisture needs to escape from the bricks, or when the problem has occurred in the past, and was not removed successfully.
The first step is to remove the source of moisture. Fix leaking pipes, dripping taps, or areas where there is rainwater splashback. Then clean the area with a wire brush, and rinse thoroughly. Allow to dry before painting over the brick with a clear coating of hydrophobic paint, to protect from further water damage.
Paint Failure Problem No.7: Fading
If the colour you spent so long choosing has started to fade, it could be due to the fact that the paint is facing direct sunlight, or that you have used the incorrect paint for the project.
Some paints have UV resistance which should reduce this problem, but it is worth noting that stronger colours will fade more easily, so choosing a plain paint such as white or cream will make this less likely.
If the fading is due to chalkiness, take the advice above. If not, a repaint may be your only option. In this case, choose a paint that is designed for longevity, such as one of the hydrophobic options on offer.
Paint Failure Problem No.8: Lapping
This is more of an application problem. The term refers to the lines sometimes seen in freshly painted walls where there has been excessive overlap of the paint. It happens when the painter fails to maintain a wet edge when applying the next section, and there is a doubling up of layers of paint.
The painter should apply the paint in a uniform way, always making sure the new section is next to a wet section. If breaks are needed, they should happen in less obvious places, like corners or window edges.
Prevent paint failure problems for good, by investing in Properla paint for your home. Not only will it help weatherproof your walls-it will also help to keep your exterior's aesthetics intact
Paint Failure Problem No.9: Mould
You may notice mould on your painted walls in areas where there is exposure to water, and where the walls do not receive any direct sunshine to dry them out. It can be caused by a failure to prime the bare wood, or by painting over mould that already exists without removing it first.
Bleach is the best way to remove mould and mildew. Alternatively, you can use a power washer-it all depends on what you have closest to hand. The area will then need to be repainted using a primer first to prep the designated area. A good waterproof paint will ensure that any future issues with water will be eliminated.
Paint Failure Problem No.10: Rusted Nail Heads
If you have rust spots on your paint, it could be due to the nail heads below rusting, and it seeping through. This is caused by the use on non-galvanized nails that have not been countersunk and filled. Even galvanised nails can rust if they are exposed to moisture, or have been sanded down.
It is best to countersink the nail heads, and fill the depression, then sand the area in question. You can also paint them with a protective coating to prevent the rust from showing through. If it has already happened, you may need to sand the areas, and repaint after protecting each of the nail heads.
Paint Failure Problem No.11: Surfactant Leaching
If the paint drying process happens too slowly, the solvents within it can leach out, and present as a brownish liquid on your fresh paint. It often happens if the paint is applied in humid conditions, or if moisture makes contact with the wall before it has dried completely.
The best way to deal with this is to wipe the affected area whenever you see the brown spots; they will usually wipe away easily. You can also allow nature to take its course as all of the leaching will happen in about a month, and then be washed away by the elements.
However, there is chance of staining of the paint, so you may need to repaint if this happens.
Prevent paint failure problems for good, by investing in Properla paint for your home. Take the first step to achieving premium property protection today, by calling 0800 1700 636, or, alternatively, by simply clicking the button below!
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