How to Install Composite Cladding

Composite cladding has become one of the most popular choices for UK homeowners looking to improve the exterior of their property. It offers a smart, modern look while providing long term durability and low maintenance. Installing it correctly is key to ensuring it lasts and performs as expected. Understanding the process in detail helps homeowners make informed decisions about whether to attempt it as a DIY project or to bring in a professional installer.

What Composite Cladding Is and Why It Matters

Composite cladding is made from a blend of recycled wood fibres and plastics, creating a product that combines the natural look of timber with the resilience of man made materials. It is designed to resist rot, warping, and insect damage, making it particularly suitable for the unpredictable UK climate. It also requires much less upkeep than timber cladding, which needs regular staining or painting to remain weatherproof. Many composite cladding systems come in interlocking boards, making them easier to install and providing a seamless finish.

Preparing the Surface for Cladding

Before installation begins, the existing surface must be properly prepared. This usually involves ensuring the wall is sound, level, and free from cracks or damage. If the cladding is being installed on a timber frame or batten system, the structure needs to be straight and securely fixed. Battens are normally treated timber strips that create a ventilated gap between the wall and the cladding, allowing airflow and helping to prevent moisture build up. Getting this preparation right is vital for both appearance and longevity, as a poorly aligned substructure will cause boards to sit unevenly.

Fitting the Battens and Starter Trim

The batten framework is usually fixed vertically or horizontally depending on the direction the cladding will run. For horizontal cladding, battens are fixed vertically, and for vertical cladding, battens are fixed horizontally. This ensures the boards have proper support. The battens are typically spaced at around 400 to 600 millimetres apart to provide consistent fixing points. Once the battens are in place, a starter trim is fitted at the base of the wall. This helps the first row of cladding boards sit level and provides a neat edge while also assisting with drainage.

Installing the Composite Cladding Boards

The cladding boards are then installed starting from the bottom and working upwards. Each board usually slots into the one below, using a tongue and groove or clip system depending on the manufacturer. Stainless steel screws or clips are commonly used, as they do not rust and provide a secure fixing. It is important to leave an expansion gap at the edges and around windows or doors, as composite materials expand and contract slightly with changes in temperature. This ensures the boards remain stable and do not buckle over time.

Corners, Trims, and Finishing Details

Corners and edges of the cladding are finished using purpose made trims. These provide a neat and weatherproof finish while concealing cut edges. Trims are also used around windows, doors, and at the top of walls. Installing these correctly is not just about appearance but also about protecting vulnerable areas from water ingress. A good installer will ensure trims are properly aligned and sealed so that the whole system works together as a protective skin for the property.

Allowing for Ventilation and Drainage

Ventilation is a key part of composite cladding installation. Without it, moisture could become trapped behind the boards and cause problems over time. The batten system should create a ventilated cavity, and there should be a continuous airflow from the base of the wall to the top. This allows any trapped moisture to escape naturally. Drainage paths must also be considered, with small gaps at the base to allow water to run off freely. A combination of correct installation and good drainage ensures the cladding performs well in all weather conditions.

DIY Installation vs Professional Fit

For skilled DIYers, installing composite cladding can be achievable with the right tools and preparation. However, precision is essential, and mistakes can compromise both the appearance and durability of the finish. A professional installer will be able to achieve a perfectly level result, properly account for expansion gaps, and ensure all trims and details are correctly fitted. The cost of professional installation adds to the budget, but it can save homeowners time and prevent costly errors.

Costs of Installing Composite Cladding

The cost of composite cladding installation varies depending on the size of the property, the type of boards chosen, and whether the work is DIY or professional. On average, supply and installation in the UK costs between £100 and £150 per square metre. DIY installation can be cheaper in terms of labour, but homeowners still need to factor in tools, fixings, and time. Professional installation provides peace of mind, particularly for large or complex projects.

Maintenance After Installation

Once installed, composite cladding is relatively low maintenance compared to timber. Occasional cleaning with soapy water is usually enough to remove dirt and keep the boards looking fresh. Unlike timber, composite boards do not need to be repainted or stained, and they are less likely to suffer from warping or rot. With correct installation and basic care, a composite cladding system can last for 25 years or more, making it a long term investment in the property’s exterior.

Conclusion

Installing composite cladding involves careful preparation, a secure batten framework, correct fitting of boards, and attention to ventilation and finishing details. While competent DIYers may attempt smaller projects, many homeowners prefer to use professional installers to ensure a perfect finish and long lasting results. With the right installation, composite cladding offers a durable, low maintenance, and attractive solution that enhances both the appearance and performance of a home.