Composite cladding does not normally need painting. However, if you want to change its colour, choosing a compatible coating is essential.
Exterior acrylic latex paints and suitable bonding primers are sometimes recommended for painting composite materials. However, not every paint will adhere successfully to wood-plastic composite (WPC), particularly capped boards with a protective polymer surface.
When considering paint for composite cladding, check:
- Surface compatibility: The paint must be suitable for the specific composite material and surface finish.
- Exterior durability: The coating should be formulated for outdoor exposure, including rain, sunlight and changing temperatures.
- Primer requirements: Some paint systems require a bonding primer designed for difficult-to-paint surfaces.
- Manufacturer approval: Check whether the cladding manufacturer permits painting and whether it affects warranty coverage.
Acrylic latex enamel may be suitable for certain compatible surfaces, but it should not be assumed to work on every composite cladding product.
Important: Ecoscape’s capped composite cladding is designed to retain its appearance without painting. Before applying any coating, obtain confirmation from Ecoscape and the paint manufacturer that the proposed system is suitable.
Even when a compatible coating is available, painting introduces an ongoing maintenance requirement because the finish may eventually peel, wear or require recoating.
Should Composite Cladding Be Painted?
Unlike wood or timber cladding, composite cladding does not need to be painted or stained. Composite cladding is made from reclaimed wood fibres and recycled plastic engineered to be long-lasting. Composite cladding does not fade, and the colour is ageless regardless of the weather elements.
Despite extreme weather temperatures, composite cladding expands and contracts but retains shape. Composite cladding is unique compared to wood or timber cladding because it does not warp, rot, or split and only requires cleaning once or twice a year.
Although painting and staining composite materials is usually unnecessary, you can paint composite cladding if you want. There may be times when painting your wood plastic composite cladding is necessary.
Explore Your Options Before Painting
While painting composite cladding should be the last resort, there are a few things you can do to bring the colour back to life.
Choose UV Resistant Composite Cladding
Choosing suitable composite cladding materials is key to its longevity. UV stable composite cladding like the Forma range from Ecoscape is fade-resistant; although not fade-proof [1], it will retain its natural look, is stain-resistant, and does not warp or splinter. Although the composite cladding will fade over time, it is also exceptionally durable and requires minimal upkeep.
Capped composite slatted cladding like Ecoscape’s Forma range does not require staining, painting, or oiling. It also comes with a warranty against fading due to weathering. [2]
Maintaining Composite Cladding
Before considering painting, thoroughly clean the composite cladding to remove dirt, algae and surface deposits. Discolouration caused by accumulated dirt may improve considerably after cleaning, making painting unnecessary.
For suitable cleaning methods, see our guide on how to clean composite cladding.
You can use a pressure washer with a spray nozzle for a deep clean; however, do so with caution. Using a pressure washer on a high setting, too close to the surface, and the wrong nozzle will damage composite cladding boards.
Avoid writing on composite cladding, especially with coloured chalk. This can distort the colour or leave permanent marks on composite cladding. Use the same warm soapy water to remove the chalk as soon as possible.
Difference Between Painting and Staining Composite Cladding
Understanding the difference between painting and staining composite cladding is essential and how it affects your cladding. To paint composite cladding, you will need acrylic latex paint, and the paint sits in layers on top of the composite materials.
Staining your composite cladding, especially scratched cladding, risks being absorbed and leaving permanent and unsightly stain marks, and that is not only the risk. The issue with painting composite cladding is that paint wears off. This would require you to continuously paint the cladding when the paint begins to peel or flake.
Safety Tips For Painting Composite Cladding
For a long-lasting and aesthetically pleasing look, preparation is key for any do-it-yourself project. Taking the necessary precautions is important to your safety. Here are a few safety tips before painting composite cladding.
- Always wear safety eyewear when sanding and painting composite cladding.
- Cover your plants and landscaping from the debris when using sandpaper on cladding.
- Wear gloves to protect your hands when handling chemicals and solvents.
- Ensure you have adequate ventilation when handling paint, chemicals, and solvents.
Best Paint for Composite Cladding
Since composite decking and cladding do not require painting or staining, the product market is relatively thin. The best paint and primer would be outdoor acrylic latex paints and an outdoor acrylic latex bonding primer.
Paint is a solid pigment that uses solvents and binders to cover a surface. Unlike a stain that absorbs, the paint sits on the cladding surface. The reality is that paint has a shelf life due to weather elements, so it is not a durable and long-lasting option for composite cladding or decking.
How to Paint Composite Cladding
One of the main reasons for painting composite cladding is years of sun exposure, which eventually causes composite cladding to fade. Wood plastic composite cladding that has been discoloured or scratched can be given a rejuvenating look with paint. Using the right paint tools and paint suitable for composite cladding is essential.
Note: Always check the manufacturer guidelines before painting composite cladding.
Tools You Need
- Pressure washer (optional)
- Mild liquid soap
- Warm Water
- Soft brush
- 36 Fibre Grit Sandpaper Discs for sanding tool/ For a fine finish, choose P800 or P1000 Grit [3]
- 60 to 80 grit paper if you are doing it by hand
- Paint Roller or Soft-bristle paint brush
- Outdoor Acrylic-based Bonding Primer
- Outdoor Acrylic Latex Paint
- Patience
1. Remove Objects Close to the Cladding
Removing your outdoor furniture and covering your grass, composite decking, pavers, and plants is vital. This will prevent dust and debris from sanding and painting from staining them.
2. Clean Your Composite Cladding
Mix the mild liquid soap with warm water (soapy water should be the same consistency you would wash dishes with), and wash the cladding with the soft-bristled brush. Rinse the cladding thoroughly with clean water and wait for it to dry.
The drying process can take approximately three to four hours, and patience is needed before you can move on to the next step.
If you are using a pressure washer, keep a decent distance between the nozzle and the surface of the cladding. Do not exceed the setting of 1,500 pounds per square inch (PSI). You risk damaging and causing unsightly cuts on the composite cladding surface.
Make sure you use a fan tip nozzle that evenly spreads the water. Concentrating on one spot could damage the cladding.
3. Check Whether Surface Preparation Is Required
Before sanding composite cladding, check the manufacturer’s recommendations.
Capped composite boards have a protective outer layer designed to resist weathering and staining. Sanding this surface can permanently damage the protective coating, alter its appearance and affect warranty coverage.
Some paint systems require surface preparation to improve adhesion, but the appropriate method depends on the particular cladding material and coating.
Do not sand Ecoscape composite cladding unless Ecoscape has specifically confirmed that the process is suitable.
If painting is approved, follow the paint manufacturer’s preparation instructions and test the proposed coating system on an inconspicuous area before proceeding.
4. Apply the Primer, then Paint
Only proceed with painting if the cladding manufacturer has confirmed that the surface can be painted and the coating manufacturer has approved the proposed paint system.
If painting is permitted:
- Ensure the cladding is clean, completely dry and prepared according to the coating manufacturer’s instructions.
- Apply a compatible bonding primer if required by the paint system.
- Allow the primer to dry for the manufacturer’s specified time.
- Apply the approved exterior paint using the recommended brush, roller or application method.
- Allow sufficient drying time between coats, following the paint manufacturer’s instructions.
Paint compatibility, preparation methods and drying times vary between products. There is no single painting procedure suitable for every type of composite cladding.
Should You Use Heat to Repair Composite Cladding Before Painting?
Applying concentrated heat to composite cladding can damage its surface, particularly on capped boards with a protective polymer layer.
Heat guns may cause discolouration, deformation or permanent damage if used incorrectly.
For this reason, avoid attempting to repair scratches using a heat gun unless the cladding manufacturer specifically recommends an approved method.
If the cladding is scratched or damaged, contact the manufacturer for advice before attempting repairs or applying paint.
Will I Lose the Warranty After Painting Composite Cladding?
Before painting your composite cladding, always check the warranty with the manufacturer. If you paint, sand, oil, or stain your cladding, you risk rendering your warranty null and void. Painting your cladding immediately after the installation voids the warranty from the manufacturer.
FAQS
How long does composite cladding last?
Our composite cladding has a lifespan of up to twenty-five years, much longer than timber or wood cladding.
How do you remove algae from cladding?
A few drops of a mild ammonia-free liquid dish soap and warm water can remove algae from the composite cladding. Ensure that you rinse the composite cladding thoroughly.
Can you power wash composite cladding?
There is a difference between a power washer and a pressure washer, although they perform the same functions. A power washer uses hot water, and a pressure washer uses cold water. A pressure washer is best suited for cleaning composite materials and plastic cladding.
Do you have to prime composite before painting?
A key selling point to composite cladding and decking is that it never needs a coat of paint. If you prefer to paint your cladding, use a bonding primer first, followed by a layer of acrylic latex paint.
Final Thoughts
Composite cladding can sometimes be painted, but whether a coating will adhere successfully depends on the material, surface finish and paint system.
Ecoscape’s capped composite cladding is designed to retain its appearance without painting or staining. Painting may damage the protective surface or affect warranty coverage.
Before attempting to paint composite cladding, always check the manufacturer’s recommendations and confirm that the proposed coating is compatible with the boards.
