The Ultimate Guide To Installing Exterior Plastic Cladding

how to install exterior plastic cladding

Exterior plastic cladding is an increasingly popular way to decorate and protect homes and offices. Composite cladding, which is made from recycled plastic and wood, is highly water-resistant, easy to install, and low-maintenance. Before installing, it's important to check the height of your building and its proximity to boundaries to meet building regulations. You should also decide whether you want horizontal or vertical cladding and whether it will cover all or part of the building. While composite cladding is designed to be easy to install, it's important to follow the manufacturer's instructions carefully to ensure optimal benefits and avoid invalidating the warranty.

Characteristics Values
Material Composite cladding is made from recycled plastic and wood fibres.
Benefits Low-maintenance, aesthetically pleasing, highly water-resistant, UV-resistant, durable, lightweight, easy to clean.
Installation Can be a DIY project, but professional installation is recommended for safety and proper installation. Manufacturers provide specific guidance and instructions for installation.
Preparation Requires a sound substrate, good-quality timber battens, insulation (if needed), and a vapour membrane.
Installation Process Fix battens around door and window openings, ensuring the ventilated air path is not blocked. Install rigid perimeter trims, then locate and nail the first cladding plank.
Building Regulations The building must have a maximum height of 11m, and cladding must be installed at least 1m away from boundaries. Planning permission may be needed depending on the specific circumstances.

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Prepare your materials

To install exterior plastic cladding, you will need to prepare your materials carefully. This will ensure a safe and successful installation process. Here is a detailed guide to help you prepare:

Firstly, determine the style and design of your cladding. Decide if you want horizontal or vertical cladding and whether you want it to cover all or part of your home. Browse online sources or guides for inspiration and ideas to help you make your decision.

Next, you should measure the height of your home to ensure it does not exceed 11 metres. This is important to comply with building regulations. According to regulations, the cladding must also be installed at least 1 metre away from boundaries. Additionally, check if you need planning permission for the installation. While it is typically covered by Permitted Development Rights, planning permission may be required for specific categories of homes. Contact your local council if you are unsure.

Now, let's move on to the materials you will need. For new projects, you will require a sound substrate, good quality timber battens (treated timber), insulation (if necessary), and a vapour membrane. Ensure you select the appropriate size of battens, such as 25mm x 38mm or 50mm x 50mm, as recommended by the manufacturer. If you are replacing existing cladding, you will also need tools for the removal of old material and a repaired substrate.

Finally, refer to the manufacturer's instructions for specific guidance. Different manufacturers may have varying installation methods, so it is crucial to follow the provided instructions carefully. This will ensure optimal benefits, maintain the validity of the warranty, and guarantee a successful installation.

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Install timber battens

When installing timber battens for exterior cladding, there are several key considerations and steps to follow. Firstly, it is essential to use good-quality timber battens that have been appropriately treated with a suitable preservative. The minimum recommended batten size is 38mm in thickness, and stainless steel annular ring shank/round head nails or stainless steel screws are the preferred method of fixing. For softwood cladding, nails should be at least 50mm in length or 2.5 times the thickness of the board being fastened, whichever is larger. Boards wider than 100mm should have twin fastenings, and butt joints should meet on a suitable batten support width.

The installation process for timber battens involves fixing horizontal boards to vertical battens, ensuring that the boards lie firmly on sufficient batten width. Vertical 'counter' battens can be used to fasten vertical boards to horizontal battens, aiding drainage and ventilation. Support battens should be attached at 600mm intervals for both vertical and horizontal battens, and no more than 400mm intervals for diagonal boards. These spacings will maintain the overall stability of the cladding.

It is important to note that timber battens should not restrict the circulation of air. A cavity should be created beneath the cladding to allow any water or moisture that penetrates the cladding to escape, maintaining the same moisture content on the interior and exterior surfaces of the wood and permitting airflow. When installing battens, it is crucial to avoid installing horizontal bottom battens as this will block the ventilated air path. Instead, ensure that the air path is open at the base and top edge of the cladding, creating a clear draw of air.

Additionally, when fixing the battens, use appropriate fixings for the substrate and ensure that battens are fixed around any door and window openings to allow plank ends to be nailed. If insulation is required, install a vapour breathable membrane behind the cladding battens to ensure the air path is not obstructed. By following these steps and considerations, you can effectively install timber battens for exterior cladding, ensuring a durable and well-ventilated structure.

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Fix window trims

Fixing window trims is a common application for PVC trims, which are used to cover the gap between old plaster and a new door or window. This is because the profile of modern joinery is usually much smaller than the old timber versions, leaving a gap of 25mm to 100mm when a new window or door is installed.

The most common method of installing PVC trims is to use an adhesive such as superglue. Apply the glue and activator to the rear edge of the trim and push into position, holding the trim in place for a few seconds. Some installers prefer to use low modulus silicon, but this method requires the trim to be fully supported until the silicon has dried.

If you are installing rigid perimeter trims, you should fix them first using 25mm A4 stainless steel ring shank pins. If you are using 2 pt. trims, only fix the back part. Once the total area is clad, finish by snap-fitting the front part of the trims.

It is important to note that you should not install horizontal bottom battens as this will block the ventilated air-path.

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Install cladding

Installing exterior plastic cladding is a great way to protect your home and transform its look without too much effort. Composite cladding is made from recycled plastic and wood, which makes it highly water-resistant and ideal for exterior use.

Preparation

Before you begin, ensure you have chosen the style and design of your cladding, whether horizontal or vertical, and whether it will cover all or part of your home. For new projects, you will need a sound substrate, good-quality timber battens (treated timber), insulation (if required), and a vapour membrane. If you are replacing existing cladding, you will need to remove the old material and check and repair the substrate.

Installation

The installation process for composite cladding is straightforward, thanks to its clip-together fitting system. However, it is important to follow the manufacturer's instructions carefully to ensure optimal benefits and not invalidate the warranty. Here is a general step-by-step guide:

  • Install timber battens as a subframe into your exterior wall. The timber should be a depth of 35mm to allow for ventilation between the cladding and the wall.
  • Screw the timber battens to the wall using stainless steel screws. Position them vertically, 175mm from the bottom of the brickwork, and space them a maximum of 500mm apart.
  • If you have a window, screw a small piece of timber batten to allow the head trim to be fixed.
  • Fix your window reveal and head trims to the timber batten before installing the cladding boards for greater accuracy.
  • Locate the first cladding plank into a starter trim and nail it to the battens using stainless steel ring shank pins.
  • Once the total area is clad, finish the perimeter trims by snap-fitting the front part of any 2-point trims.

Additional Considerations

  • Ensure that the air path is open at the base and top edge of the cladding for ventilation.
  • Do not install horizontal bottom battens as this will block the ventilated air path.
  • Always follow the manufacturer's specific guidance for installation, as instructions may vary.
  • Your home must have a maximum height of 11m, and the cladding must be installed at least 1m away from boundaries to meet building regulations.
  • You typically won't need planning permission, but check with your local council if your home falls into specific categories.

If you feel unsure about installing cladding yourself, consider hiring a professional installer or tradesperson to ensure a safe and proper installation.

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Finish perimeter trims

Trims are an excellent way to finish any unsightly gaps or edges that are left after or during the fitting process. They are also used to cover any internal, external or open edges with a decorative finish. This is the simplest method of achieving a tidy finish to your cladding.

To finish perimeter trims, snap-fit the front part of any 2-point trims. It is recommended to use 50mm x 50mm battens. Install battens with appropriate fixings for the substrate. Ensure that the 50mm air-path is open at the base and the top edge of the cladding to create a clear draw of air directly behind the cladding. This can be covered with a suitable vent trim to stop insect ingress.

Cladding trims provide a clean look rather than using just silicone, which can provide an inconsistent finish. They are available in a range of colours and styles to complement the cladding design. Trims are also available in different thicknesses and lengths to match the depth of your cladding panels.

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Frequently asked questions

You must ensure that your home has a maximum height of 11m and the cladding must be installed at least 1m away from boundaries to meet building regulations. You may also need to check with your local council to see if you need planning permission.

You will need a sound substrate, good quality timber battens (treated), insulation (if required) and a vapour membrane.

Firstly, fix timber battens to your exterior wall using stainless steel screws. Then, fix your window reveal and head trims to the timber batten before installing the cladding boards. Finally, install the cladding.

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