arrow-up

Cladco ProDeck & VersaDeck Decking Installation Guide

Installation Guide, Aftercare, and FAQs

Storage, Colour Variation, and Warranty

STORAGE AND HANDLING

Cladco ProDeck or VersaDeck composite decking boards should always be stored in a cool and dry place that is out of direct sunlight. They should be stored on a level surface that supports the entire length of the board - ensuring they do not warp or bend.

Protective gloves must be worn when handling and cutting boards, and care should be taken when lifting. We recommend a minimum of two persons carry the boards, always ensuring it is within their physical capabilities. It is recommended that when cutting the boards that they are placed on a timber surface to prevent scuffing.

COLOUR AND GRAIN

Cladco ProDeck and VersaDeck decking boards are manufactured from capped composite materials and are designed to replicate the natural variations of a timber decking board.

ProDeck boards feature a woodgrain effect or narrow groove effect top layer whilst VersaDeck feature a woodgrain effect on either side. It is, however, still recommended that you purchase all capped composite boards required for the same project together at the same time, as this will ensure there is colour consistency throughout, whilst saving any additional delivery costs.

We advise that all boards are laid out prior to installation to ensure a natural, well-balanced tone throughout. As with all materials exposed to direct sunlight, some natural weathering may occur over time. Boards should be acclimatised to the same temperature and stored in the same environment prior to installation.

15 YEAR WARRANTY

ProDeck and VersaDeck composite decking boards are supplied with a 15-year warranty extended, subject to terms and conditions. We advise installing these boards onto Cladco recycled plastic decking subframes, in accordance with this installation guide. Cladco decking boards should be installed according to this installation guide, and failure to do so may invalidate the warranty.

BOARD TOLERANCE

Due to the natural composition of composite materials, a small tolerance of up to ±5mm is present in both the length and width of boards. This is completely normal and accounted for in our recommended installation practices.

Tools & Equipment

PROTECTIVE EQUIPMENT

When handling or carrying capped composite boards it is advised to wear long sleeves and gloves. When cutting the boards we suggest you wear a protective dust mask, ear defenders and safety glasses. Knee pads are recommended to be worn when fitting decking.

TOOL SET

Standard everyday carpentry tools will be needed to complete the installation, including: tape measure, pencil, spacing tools, and stanley knife.

POWER DRILL AND DRIVER

Standard power drills can be used when installing capped composite boards. A standard Phillips screwdriver bit PH2 should be used when working with Speeddekz screws.

CLADCO ADHESIVE

We recommend using Cladco adhesive to secure ProDeck trims when concealing a support system beneath. When using the adhesive, do not allow the adhesive to get on the decking boards, as this can damage the finish of the deck.

JIGSAW OR HANDSAW

Capped composite boards can be cut using any standard wood cutting tools. We recommend using a fine-toothed blade to get the cleanest finish to your cut edge.

SPIRIT LEVEL AND STRING

A spirit level is essential when installing your decking to ensure a level support system. A spirit level ensures that capped composite boards are installed along a straight edge. A slight slope should be included to allow for water run-off.

Prepare Your Base

Choose from two bases:

CONCRETE BASE

A 100mm thick concrete base is recommended, with a slight slope for drainage to occur. The optimum slope should be around 5mm for every metre.

GRASS OR SOIL BASE

Remove the turf or soil until the ground is completely even, ensuring to remove any debris or rocks from the area. Cover the area of your site with a layer of weed mat to prevent any weed regrowth coming up under your decking.

If you need to overlap the weed mat, ensure you do this with enough fabric to prevent any gaps. Once cut and pinned into place, cover the weed mat with your desired coverage, such as chippings, bark or stones, so that none of the material is exposed.

AIRFLOW

Ensure your substructure design allows for significant airflow and ventilation. If the decking is being installed in areas with poor ventilation, it must be installed on top of a substructure that allows for an airflow gap of 30mm for composite joists and 50mm for both structural composite joists and recycled plastic joists.

Recycled Plastic Framework

BEFORE YOU BEGIN

The below installation guideline is using Cladco recycled plastic decking Joists. Please Note: this can also be achieved with composite joists.

For wall-to-wall decking installations, please follow the below instructions. For Decking installations with exposed edges, it is recommended to use bullnose boards. Please refer to the bullnose board installation section further down the page.

1

The maximum recommended space between recycled plastic joist rows depends on the angle at which you intend to lay your boards about the joists, but should never exceed 300mm, please see the diagram. If using timber joists, apply deck tape to the top surface and exposed cut ends to protect them from moisture and prevent rotting.

2

Capped composite bullnose/starter clips need to be fixed to the end of the joists before laying the first board, leaving a gap of at least 10mm between any walls and the starter clip. Use one bullnose/starter clip and screw per joist. Place the first capped composite board on the frame, ensuring the boards run perpendicular to the joists and secure the first board into the first bullnose/starter clips. Do not screw through the capped composite board.

3

Take a t-clip and slot it into the groove along the first board you have just secured. Place a screw through the hole of the t-clip. Screw down and into the joists below but do not tighten at this point. Continue to fix t-clips in place along the groove of the board, screwing one t-clip into each joist. Ensure the capped composite boards do not overhang the joist at the edge by more than 25mm and leave a 10mm expansion gap between the wall or any other fixed objects that may surround the decking.

TOP TIP

Pin each board in place using a locking clip, using one per board to minimise misalignment. Fit into the groove of the board on the centre joist. Please note: These locking clips can be used alongside T-clips, but are not compatible with our hidden clips due to the difference in expansion gap left.

4

Take the next capped composite board and slot the adjoining t-clips from the first board into the groove of the second board and secure them next to each other. Repeat steps 3 and 4 to cover the entire decking area, using one t-clip and one screw per joist. We recommend alternating the direction of the woodgrain surface on every other board for a more natural, varied finish

Please Note: Do not allow capped composite boards to meet at the ends. T-clips will leave a 7mm expansion gap between each board to allow for expansion and contraction in temperature changes. It is not recommended that boards are installed in temperatures below 5°C.

5

For the final two boards, measure the width of both boards together (including the 7mm expansion gap) to discover where the outer edge of the final board will lie and mark out with a pencil on the below joists. Use this mark to fit the final bullnose/starter clips and slot the last board into place using these clips.

6

Slide the required amount of t-clips through the final board groove, aligning with the joists, before the penultimate board is inserted and screwed into place with the t-clips.

TOP TIP

If using capped composite fascia boards, pre-drill pilot holes with a counterbore through the fascia at 200-300mm intervals, and allow for an expansion gap between the end of the decking board and the fascia board of 5-7mm. Screw the fascia board to the joist at a 90-degree angle.

Finishing Your Decking

LOOKING FOR A SMART WAY TO CONCEAL YOUR DECKING EDGES?

If you are installing decking that is not surrounded by walls and will have exposed edges, it is recommended that you begin your installation with our capped composite bullnose boards. These boards have a groove-less outer edge and will conceal the ends of the six-hole capped composite boards.

For an Overhanging Finish

1

Using the same frame substructure, fit two starter/bullnose clips to the end of your joists as shown here, ensuring they are spaced 75mm apart with the first clip being 11mm from the edge joist.

2

Fit the capped composite bullnose board over the starter/bullnose clips and push forward until flush. Secure in place with t-clips as required before continuing to fit the rest of your standard capped composite decking boards.

For a Flush Finish

1

Using the same substructure, fit two starter/bullnose clips to the end of your joists as shown here, ensuring they are spaced 75mm apart with the first clip being 17mm from the edge of the joist.

2

Fit the capped composite bullnose board over the starter/bullnose clips and push forward until flush. Secure in place with t-clips as required before continuing to fit the rest of your standard capped composite decking boards.

For Installation With Steps

Install the capped composite bullnose boards as above on each step, leaving a small 9mm gap behind to allow the fascia board to fit. Fit the fascia boards on each step to conceal the decking underneath. Ensure you have planned and measured your steps in accordance with the capped composite bullnose and fascia boards dimensions to avoid any vacant space.

Tips on Using the Capped Composite T-Clip System

1

Insert the t-clip as shown in the diagram so the front of the clip is within the groove of the secured capped composite bullnose board.

2

Screw the t-clip into the joist before pushing the next capped composite board firmly in place.

3

Repeat this for the remainder of the capped composite boards, ensuring that the front of all t-clips is firmly in the groove of the bullnose board.

Aftercare and Maintenance

SNOW AND ICE

Take care when walking over your decking in adverse weather conditions, such as snow or ice, as this may cause the decking to become slippery.

If using de-icer, ensure that the product contains calcium chloride, as this will not damage the decking. It may leave a slight residue behind, but this can be easily cleaned away. Always check before using any chemicals on the decking.

Do not use grit, sand or metal/plastic spades on your decking as they may scratch the surface.

MAINTAINING YOUR DECKING

In some cases, pressure washing may be required for long term dirt. When using a pressure washer, it is recommended that a distance of at least 300mm is left between the decking and the pressure washer nozzle to avoid any damage.

For standard everyday debris such as, plants, leaves, berries and animal droppings, simply brush your decking free of any debris with a soft/ medium bristled broom.

Discolouration can be caused by chemicals found in everyday household products, such as suntan lotion, or insect repellent; take care when using these products near your capped composite decking.

During the first 6-12 months after installation, the colour of the decking boards will stabilise. During this time, capped composite boards may fade naturally from weathering before stabilising to a final colour.

FIRE AND HEAT SOURCES

Precautions should be taken when using fire pits and BBQs near capped composite decking. Caution should be taken with embers coming into contact with the decking. Cladco cannot be held responsible for any fire damage or flames that come into contact with the decking. To use a heat source near the decking is entirely at the risk of the customer.

MOULD AND MILDEW

Mould and mildew are common in outdoor environments. The climate will affect how mould grows, dependent on temperature and moisture levels. To minimise mould growth on your decking, ensure it is cleaned often. If mould is present, use hot, soapy water to remove. In cases of more stubborn dirt or grime, pressure washing may be necessary to restore the decking's appearance.

1

Use a brush to remove any debris, such as leaves, off the decking to create a clear surface ready for cleaning.

2

Prepare a bucket of hot soapy water. You may want to wear rubber gloves.

3

Apply the hot soapy water to your decking. Once applied use a brush to scrub the surface of the decking. Any surface debris will start to lift off.

4

Leave the hot soapy water on the surface for several minutes before rinsing. Ensure all soap and debris have been successfully removed from the boards before leaving to dry.

FAQs

Bullnose decking boards are designed to create a neat, professional-looking edge around your deck. They can be used with Signature, ProDeck, and Nordeck ranges and are typically installed as a border rather than as part of the main deck area.

Bullnose boards are fixed in the same way as standard decking boards, using the appropriate screws or clips for your chosen range. Because they feature a rounded front edge, they provide a smooth, finished look that’s ideal for framing the deck or defining steps and perimeters.

Due to natural batch variations and the presence of timber fibres in composite boards, bullnose pieces are not intended to blend seamlessly with the rest of the decking. For this reason, many customers choose a contrasting colour to create a stylish picture‑frame effect around the edge.

For step edges or other high-impact areas, bullnose boards also offer enhanced durability thanks to their thicker front profile.

We do not recommend placing fire pits, BBQs, or outdoor heaters directly on decking, as the intense heat they produce can affect the integrity of the boards. High temperatures may cause discolouration, scorch marks, surface damage, or warping, especially if the appliance sits directly on or too close to the deck surface.

Yes, both our Signature and ProDeck composite decking boards feature two usable sides: one with a woodgrain finish and the other with narrow grooves. You can choose whichever side best suits your preferred style and the look you want to achieve for your decking.

Composite boards are designed to be durable and offer good resistance to everyday wear, including minor scratching. However, no cladding or decking product is completely scratch‑proof. Lighter surface marks can occur from impacts, sharp objects or abrasive materials.

Capped composite boards, such as ProClad, have an additional protective outer layer that provides enhanced scratch resistance compared to uncapped options. Signature boards are also robust, but as they have an exposed composite surface, they may show marks more easily.

In most cases, light scratches will become less noticeable over time as the boards naturally weather. Regular cleaning and avoiding sharp or abrasive contact will help maintain the best appearance.

To achieve a neat and secure finish, composite trims should be installed using Cladco Adhesive. This provides a strong bond when concealing the subframe or finishing the edges of your decking.

For best results, follow these guidelines:

  • Use Cladco Adhesive to attach the trims securely.
  • Avoid getting adhesive on the decking boards, as this may mark or damage the surface finish.
  • Do not install trims in hot temperatures, as heat can affect the setting process.
  • Once positioned, clamp the trims in place for up to 24 hours to ensure a firm, long‑lasting bond.

Decking boards can warm up in direct sunlight, but they won’t usually become too hot to walk on. The colour you choose plays a big part too. Lighter shades, such as light grey or quartz, tend to stay cooler, while darker tones naturally absorb more heat. If your decking is in a particularly sunny spot, opting for a lighter colour or adding some shaded areas can help keep the surface comfortable throughout the day.

Mould or mildew can develop on any exterior surface due to airborne spores. If it appears on your decking or cladding, clean the affected area with warm soapy water or a suitable outdoor cleaner.

Good installation practices also help reduce the likelihood of future build‑up. Ensuring proper airflow and ventilation behind cladding, and maintaining the correct spacing between decking boards, allows moisture to escape and keeps surfaces drier.

Regular inspections and occasional cleaning will help maintain the appearance and longevity of both decking and cladding.

Decking can be installed in a wide range of outdoor spaces, making it a versatile choice for both residential and commercial projects. You can install decking on:

  • Gardens and patios - Ideal for creating seating areas, outdoor dining spaces, or raised platforms.
  • Balconies and terraces - Provided the substructure is suitable and properly supported.
  • Around hot tubs, pools, and ponds - Composite decking is especially popular in these areas thanks to its low‑maintenance, water‑resistant properties.
  • Holiday homes, lodges, and caravans - Perfect for building long‑lasting outdoor platforms.
  • Rooftop and elevated areas - As long as the structure can safely support the load and an appropriate subframe is used.
  • Commercial outdoor spaces - Such as pubs, restaurants, schools, and public seating zones.

Yes, a standard board can be used as an edging piece where the edge is purely aesthetic, such as on a balcony or along a decorative perimeter, if that’s your preferred finish.

However, we do not recommend using a standard board in areas that are likely to receive regular impact, such as steps or high‑traffic edges. These areas require greater durability.

For these applications, bullnose edging boards are the better choice. They are specifically designed with a thicker, reinforced profile to withstand knocks, scrapes, and repeated foot traffic, making them ideal for step treads, stair edges, and other high‑impact zones.

Using the correct edging board will help maintain the look, safety, and long‑term performance of your decking.

Of course. For any of our decking products, you can use our online decking calculator to establish quantities and any other ancillary products you’ll need, providing a catered quote for your specific project. Or give our sales team a call on 01837 659901 to get a free quote over the phone.

loader
Loading...