There are many reasons to why you might encounter painting problems; however, there are a couple of things you can do to help prevent it from happening in the future. Read on to find out exactly what you might come across when decorating.
One of the main causes of painting problems is you. People often do not take the right preventative measures such as good preparation because it is to much hassle. However, this will only cause you problems in the long run. You can witness a range of bubbling, blistering, efflorescence, alligatoring, rusting and cracking.
Each of these issues often occurs due to a number of factors, all of which can be eliminated in the preparation phase.
It can be quite easy to detect when you might have a mildew issue as black, brown or even dirty green spots appear on the surface of the paint. Mildew will often start to form when the surface is either damp, or there is a lot of humidity in the area; it is even more likely to form if the area does not catch any sunlight or has minimal ventilation.
To get the surface back to normal you will want to first find the cause of the problem, if the area is not well ventilated you may want to look at purchasing a dehumidifier of which you can get from AirConDirect. Once you have ensured the humidity of the room has been levelled, you will then want to remove the top layer of paint by scrubbing the surface. Repainting might not always be necessary, although, if the mildew has stained the walls you may want to look at giving it another coat.
Alternatively, you can also look at increasing the lifespan of your exterior cladding or curtain wall systems by asking a contractor to apply a special protective coating which will prevent mildew from appearing.
When there is a loss of adhesion between layers of paint, blistering will often occur. This is when one layer of paint or even multiple layers start to lift from those beneath it. Blistering is more likely to occur when the coating or paint has not been applied in the right weather conditions. Painting is a tricky task at the best of times but ensuring the weather is right can also be a little difficult, if you have applied a layer of paint in direct sunlight, the top layers are more likely to dry before those from underneath. If you have applied a coating or paint to a surface that is damp or wet, this can often trap the moisture into the surface which will, later on, try to escape causing it to blister.
Blistering can also occur if you have not taken the time and dedication to ensure the surface you are coating or painting has been sufficiently prepared. When it comes to preparation it doesn’t just mean sanding the surface down to ensure it is smooth; you will also need to make sure it is clean as dirt and grime can have a real impact on how well the coating adheres to the surface.
If the blister is bulbous and can be pushed down to the surface, the likelihood is, there is a significant amount of trapped moisture in the surface of the material which is affecting how well the paint sticks. To remove any of the moisture, you will first need to remove all of the paint. You will then need to use fans and a dehumidifier to remove all of the moisture. Depending on what material you are working with each will have a different drying time, however, just make sure it is thoroughly dry before considering reapplying another coat of paint.
Usually red or brown in colour, rust can often stain the surface, this is normally in the form of an iron-based substance. Changing weather conditions can play a huge role in how much rust forms on your commercial building. If you are painting the exterior of your home or commercial property, parts of your building are more likely to be exposed compared to others. So, you should always have a thorough check of non-galvanised materials.
Rusting can be a right pain, as it may appear rather small but can have detrimental effects on cladding panels. At the first signs of rust, you should always call in your on site spraying contractor to apply a protective coating, by doing so you can ensure the panels lifespan has been increased. It will also prevent you from having to replace them which can be very expensive.
A bit like blistering, alligatoring is caused by the application of a top coat drying before the layers beneath it have fully dried. Alligatoring appears as cracks in the paint, however, resembles scales of an alligator. If the paint initially used to coat the building is oil based then over time a natural ageing process takes place, with this and temperature fluctuation taking place, the oils can dry out leaving the paint hard and more likely to crack.
To resolve the problem you will want to look at removing all of the paint, which can be done using a sander and some paint stripper. Before reapplying any coat, you will want to ensure you are using an excellent quality primer as this can provide a smooth application. The surface also needs to be adequately prepared before any coating can be reapplied.
How to deal with painting problems
If you find once you have painted a surface to come back to it blistering, cracking, rusting or alligatoring, you will want to ensure you have stripped back the paint fully before starting again.
Ensure all of the existing paint has been removed and prepare the surface removing all of the dirt and grime. Sand the surface down to make sure it is smooth and even, this will give the coating or paint a great finish. When it comes down to painting the exterior, you will first want to ensure you have used a primer, this will not only provide the surface is smooth, but it will also allow the coating to adhere to the surface.