Painting a humid home can present some unique challenges. From moisture and condensation to mould, peeling and poor adhesion, humidity can affect both the preparation process and the final result.
Living in a humid or coastal climate has plenty of advantages, but it can be tough on your home’s paintwork.
From bathrooms and kitchens to bedrooms, living areas and coastal exteriors, moisture in the air can affect how paint dries, adheres and performs over time. Condensation can also contribute to dampness, mould and deterioration when moisture isn’t properly managed.
So, if you’re thinking about giving your home a fresh coat of paint, it’s important to consider more than just your colour choice.
Here are some of the key do’s and don’ts of painting a humid home.
DO: Make sure the surface is properly prepared
Good painting starts well before the first coat goes on.
In humid environments, proper preparation is particularly important because moisture can make existing problems worse. Surfaces should be clean, dry and free from dirt, mould, mildew, loose paint and other contaminants before painting begins.
Any cracks, peeling paint or areas affected by moisture should also be addressed rather than simply painted over.
A fresh coat of paint can’t fix an underlying moisture problem.
DON’T: Paint over mould or damp surfaces
This is one of the biggest mistakes homeowners can make.
If mould or mildew is present, it needs to be properly addressed before painting. Likewise, if a wall or ceiling is damp because of a leak, condensation or another moisture issue, the underlying cause needs to be resolved first.
Painting over moisture may temporarily hide the problem, but it won’t make it disappear.
The Australian Government’s guidance for tropical and subtropical homes also recommends removing mould from surfaces before painting.
DO: Pay attention to ventilation
Good ventilation is particularly important in rooms where moisture is regularly produced.
Bathrooms and kitchens can accumulate significant amounts of moisture from showers, cooking and everyday activities. Using exhaust fans and allowing rooms to properly air out can help reduce moisture build-up.
For bathrooms, for example, keeping the exhaust fan running during and after a shower can help reduce condensation.
Better ventilation doesn’t just help your paintwork, it can also help create a healthier, more comfortable home environment.
DON’T: Assume every room needs the same type of paint
Different areas of your home experience different levels of moisture and wear.
Bathrooms, kitchens and other humid areas generally benefit from durable, washable finishes that are better suited to regular cleaning and moisture exposure. Semi-gloss and gloss finishes are commonly recommended for high-humidity areas because they provide a harder, more washable surface.
The right product will depend on the room, the surface and the specific conditions, which is why it’s worth getting professional advice before choosing your paint.
DO: Give paint enough time to dry and cure
Humidity can slow the drying process, particularly when there is a lot of moisture in the air.
That means it’s important not to rush between coats simply because the surface looks dry.
Paint manufacturers provide recommended drying and recoating times for their specific products, and these can vary depending on temperature, humidity and ventilation. Allowing adequate drying time helps achieve a more even and durable finish.
A professional painter will take the conditions into account when planning the work.
DON’T: Ignore condensation
Condensation isn’t just an annoyance on your windows.
It occurs when humid air comes into contact with a cooler surface, and ongoing condensation can contribute to dampness, mould and deterioration within a home.
If you regularly notice water droplets on windows, damp patches, mould or peeling paint, it’s worth investigating what’s causing the excess moisture before repainting.
DO: Consider the coastal environment
For homes around Coffs Harbour and the Mid North Coast, humidity isn’t the only environmental factor to consider.
Coastal properties can also be exposed to salt-laden air, which can contribute to the deterioration of paintwork and corrosion of metal surfaces. The Australian Standard guide to painting buildings recognises coastal influence and atmospheric humidity as factors affecting the durability of paintwork.
This makes proper surface preparation and choosing an appropriate coating system particularly important for coastal homes.
DON’T: Try to fix moisture problems with paint alone
If paint is repeatedly bubbling, peeling, blistering or developing mould, there may be more going on than an ageing paint finish.
Moisture can become trapped beneath coatings and contribute to blistering, peeling and adhesion problems.
Before repainting, it’s important to determine whether the problem is caused by condensation, a leak, poor ventilation, water ingress or another underlying issue.
Paint should be part of the solution, not a cover-up for the problem.
What about painting during humid weather?
There’s an important difference between painting a home that is naturally humid and painting while the weather itself is particularly humid.
Our previous article, The Do’s and Don’ts of Painting in Humid Weather, looks specifically at how humidity affects the painting process, including drying times, application, timing and common mistakes.
For the best result, professional painters consider the conditions on the day, the surface being painted and the manufacturer’s recommendations for the particular paint system.
Need to repaint a humid or coastal home?
If your home is showing signs of peeling, bubbling, mould or general wear, don’t simply paint over the problem.
At Shields Painting, we can assess the condition of your surfaces and recommend the right preparation and painting approach for your home.
Whether you’re refreshing an interior, updating a bathroom or kitchen or giving your home’s exterior a complete repaint, proper preparation is the foundation of a finish that looks great and lasts.
Looking for professional painters in Coffs Harbour and the surrounding areas? Get in touch with Shields Painting for a free quote today!