CLADCO COMPOSITE DECKING AND JOISTS
Installation Guide, Aftercare and FAQs
Important Advice Prior to Installation
STORAGE AND HANDLING
Cladco Composite Decking Boards should always be stored in a cool shaded spot on a flat and level surface which supports the whole length of the Board. It is recommended to store the Boards on a pallet to ensure they are not sat directly on wet or cold ground.
Wear protective gloves when handling the Boards and take care when lifting them. We recommend that a minimum of two physically capable persons carry the Boards. Always ensure anyone assisting with installation or handling is physically capable.
BATCH COLOUR
Cladco Composite Decking is made with a combination of materials, including wood, making it a natural product that will exhibit colour variations. As a result, the colour will differ between batches, even when ordered at the same time. You may also notice slight colour differences within a single batch. Orders purchased at different times will display noticeable shade differences.
Products purchased together but then split into two separate projects will stabilise at different rates. For example, if an area is installed and extended sometime later, variations may occur within the Boards, even if they come from the same batch. If Composite Boards are used across multiple projects, the stabilisation process will vary for each set, leading to differences in appearance over time.
Cladco Composite Decking is designed and manufactured to mimic the natural grain and colour variations found in real timber decking. To ensure a balanced and visually pleasing result, we recommend laying out all the Boards before installation to evenly distribute the natural variations across your Decking area.
15 YEAR GUARANTEE
Cladco Composite Decking Boards are supplied with a 15-year guarantee, subject to terms and conditions. We advise installing Composite Decking Boards onto Cladco Recycled Plastic Decking Subframes, and in accordance with our Installation Guide, to qualify for the extended 15-year guarantee. Cladco Decking Boards should be installed as per this Installation Guide, and failure to do so may invalidate the guarantee.
For further information, see www.cladcodecking.co.uk/cladco-profiles-limited-conditions-sale.
DOUBLE JOISTS AND FIXING CLIPS
Please note that double Joists must be installed at butt joints to provide adequate support for each Board end. Additionally, Fixing Clips must be used at each Board end, and Boards should never share a Fixing Clip.
Adhering to these guidelines will help ensure proper installation and longevity of your Composite Decking. Failure to follow these guidelines will invalidate the product’s warranty.
COLOUR STABILISATION
All Cladco Composite products contain UV stabilisers; however, due to their natural elements, all Composite products will undergo an initial colour stabilisation process. This may result in some changes in colour during the first few months after installation as the product acclimatises to its environment.
TEMPERATURE EXPANSION
Cladco Composite Decking Boards will naturally expand and contract with changing temperatures. To account for this, it is essential to follow our recommended guidelines when installing Boards, particularly where two Boards meet end-to-end at butt joints.
Spacing guidelines for butt joints:
- 7mm spacing at temperatures of 5°C and below
- 6mm spacing at temperatures between 5°C and 15°C
- 5mm spacing at temperatures of 15°C and above
Tools
PROTECTIVE EQUIPMENT
When handling or carrying Decking 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 a tape measure, pencil, spacing tools and stanley knife.
POWER DRILL OR DRIVER
Standard power drills can be used when installing Composite Decking Boards. A standard Phillips screwdriver bit PH2 x 65mm should be used when working with Speeddekz 65mm Woodscrews and Speeddekz 50mm Screws.
CT1 ADHESIVE
We recommend using CT1 Adhesive to secure Composite Trims when concealing a support system beneath. When using CT1 Adhesive, do not allow the Adhesive to get on the Decking Boards, as this can damage the finish of the deck.
JIGSAW OR HANDSAW
Composite Decking 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 Decking Boards to ensure a level support system. A spirit level ensures the Decking Boards are installed along a straight edge. A slight slope will 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 re-growth 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 Weed Mat material is exposed.
AIRFLOW
Ensure your substructure design allows for significant airflow and ventilation. If the Decking is being installed on areas with poor ventilation, the Decking substructure must be installed on top of Joists which allow for a 47mm airflow gap.
Recycled Plastic Framework
1
Recycled Plastic Joists can be installed directly over grass ensuring that Weed Mat is laid underneath. Alternatively, a raised substructure can be installed using Recycled Plastic Posts. The maximum recommended space between Joist rows depends on the angle at which you intend to lay your boards in relation to the Joists, but should never exceed 40cm, please see diagram.
2
Starter Clips need to be fixed to the end of the Joists before laying the first Board. Place these at the end of each Joist, leaving a gap of 15mm between the wall and the Starter Clip to allow for expansion.
3
Our Composite Boards are easily fastened to the Joists of a supporting substructure with the help of our Stainless Steel Screw and Clip System. Start at the outside of the area to be decked. Place your first Board and fix it to each Joist it crosses using a row of Starter Clips.
EXTREME TEMPERATURES
Extreme temperature changes could cause the Boards to expand or contract. Ensure Boards have had sufficient time to acclimatise to the temperature before installing. Do not install in extreme temperatures.
CUTTING
If Boards need to be cut to size, ensure the Boards are installed and secured immediately after cutting.
Laying the Decking Boards
4
Slot Clips into the groove along the side of the Board and screw them into the supporting Joists with the screws provided, using one Clip for each supporting Joist. We recommend you use our Stainless Steel Wood Screws offering increased wear and less corrosion. T-Clips will leave a 7mm gap between Boards.
5
Fit your next Board by sliding it onto the Clips used to secure the first Board and fitting another set of Clips to secure the opposite side of the Board, using one Clip for each supporting Joist. Follow a similar process to fix subsequent Boards. The ends of Boards must be fully supported. No overhang or cantilever is advised.
6
At butt joints – where the ends of two Decking Boards meet – you will need to ensure that each Board is held in place with its own Clip where they meet. Please ensure you leave adequate gaps for expansion and contraction of the Boards, in most cases this will need to be at least 7mm.
HAVE YOU THOUGHT OF TRYING A
DIAGONAL PATTERN?
Why not transform your space by installing in a diagonal pattern? This pattern is great for walkways or for the more compact decking areas, as it can elongate the space.
Simply lay the Boards at a 45-degree angle to the Joists, or build the Joists to a 45-degree angle within the frame. When using a diagonal design, the Joists must be no more than 250mm apart.
7
Having fastened your Boards, all that remains is to tidy up the sides of your new Deck with our Composite Skirting or Fascia Boards, which can be used to hide the unfinished ends of Boards and supporting Joists.
8
Our Hollow Decking End Caps are used to seal off the ends of Hollow Core Boards to give your Decking a professional finished look. End Caps are available in the same colours as all our Composite Decking Boards. Apply them to neatly complete your Decking project.
RAISED DECKING AREA
Steps and a raised Decking area can be included into your design using upright Posts to support the raised framework. This will completely transform your Decking space into a dynamic, relaxing outdoor area.
Composite and Timber Framework
1
Boards must not be laid directly on the ground but should be fixed to the Joists. The maximum recommended space between Joist rows depends on the angle at which you intend to lay your Boards in relation to the Joists, but should never exceed 400mm, please see diagram. Composite Joists should be screwed into the concrete base.
2
A gap of at least 15mm should be left between the ends of Joists and a fixed object such as a wall, and at least 8mm between the ends of Joists at butt joints. These allow for proper drainage and temperature expansion.
3
A Starter Clip needs to be fixed to the end of the Composite Joists before laying the first Board. Place these at the end of each Joist where you will start to lay your Boards, leaving a gap of 15mm between the wall and the end of the Joist to allow for expansion.
4
Our Composite Boards are easily fastened to the Joists of a supporting substructure with the help of our Stainless Steel Screws and Clip System. Start at the outside of the area to be decked. Place your first Board and fix it to each Joist it crosses using a row of Starter Clips.
EXTREME TEMPERATURES
Extreme temperature changes could cause the Boards to expand or contract. Ensure Boards have had sufficient time to acclimatise to the temperature before installing. Do not install in extreme temperatures.
CUTTING
If Boards need to be cut to size, ensure the Boards are installed and secured immediately after cutting.
5
Slot Clips into the groove along the side of the Board and screw them into the supporting Joists with the screws provided, using one Clip for each supporting Joist. We recommend you use our Stainless Steel Wood Screws offering increased wear and less corrosion. T-Clips will leave a 7mm gap between Boards.
6
Fit your next Board by sliding it onto the Clips used to secure the first Board and fitting another set of Clips to secure the opposite side of the Board, using one Clip for each supporting Joist. Follow a similar process to fix subsequent Boards. The ends of Boards must be fully supported. No overhang or cantilever is advised.
7
At butt ends, where two Decking Boards meet, ensure each Board is held in place with its own Clip. Allow adequate spacing at both parallel edges and butt joints to allow for expansion and contraction, in most cases this will need to be at least 7mm. When using a Hollow Composite Board, you will need End Caps to seal the ends.
1
A Timber substructure must be installed onto a raised frame over grass, with Weed Mat underneath. Timber Posts should be secured at a maximum of one-metre intervals around the edges of the frame. The maximum recommended space between Joist rows depends on the angle at which you intend to lay your Boards in relation to the Joists, but should never exceed 400mm, please see diagram. Apply Deck Tape to the top surface and cut ends of the timber joists to protect them from moisture.
2
Apply Deck Tape to the top surface and cut ends of the Timber Joists to protect them from moisture. Starter Clips need to be fixed to the end of the Joists before laying the first Board. Place these at the end of each Joist, leaving a gap of 15mm between the wall and the Starter Clip to allow for expansion.
3
Our Composite Boards are easily fastened to the Joists of a supporting substructure with the help of our Stainless Steel Screw and Clip System. Start at the outside of the area to be decked. Place your first Board and fix it to each Joist it crosses using a row of Starter Clips.
4
Slot Clips into the groove along the side of the Board and screw them into the supporting Joists with the screws provided, using one Clip for each supporting Joist. We recommend you use our Stainless Steel Wood Screws offering increased wear and less corrosion. T-Clips will leave a 7mm gap between Boards.
5
Fit your next Board by sliding it onto the Clips used to secure the first Board and fitting another set of Clips to secure the opposite side of the Board, using one Clip for each supporting Joist. Follow a similar process to fix subsequent Boards. The ends of Boards must be fully supported. No overhang or cantilever is advised.
6
At butt joints – where the ends of two Decking Boards meet – you will need to ensure that each Board is held in place with its own Clip where they meet. Please ensure you leave adequate gaps for expansion and contraction of the Boards, in most cases this will need to be at least 7mm.
EXTREME TEMPERATURES
Extreme temperature changes could cause the Boards to expand or contract. Ensure Boards have had sufficient time to acclimatise to the temperature before installing. Do not install in extreme temperatures.
CUTTING
If Boards need to be cut to size, ensure the Boards are installed and secured immediately after cutting.
7
Having fastened your Boards, all that remains is to tidy up the sides of your new Deck with our Composite Skirting or Fascia Boards, which can be used to hide the unfinished ends of Boards and supporting Joists.
8
Our Hollow Decking End Caps are used to seal off the ends of Hollow Core Boards to give your Decking a professional finished look. End Caps are available in the same colours as all our Composite Decking Boards. Apply them to neatly complete your Decking project.
BULLNOSE FRAMING
Composite Bullnose Boards are intended for use as borders around your Composite Decking area. Due to natural batch variations and the timber within the Boards, they are not designed to blend seamlessly with the rest of your Composite Decking. For an enhanced aesthetic, we recommend choosing a contrasting colour to create a picture frame effect.
Finishing Your Decking
CHOOSING THE RIGHT TRIMS
Made with the same Composite material and colours as our Decking Boards, Cladco Bullnose Boards, Fascia Boards, Skirting Trims and Corner Trims can all be used to finish your project to a high-end standard. Fascia Boards can be fitted to the exposed Joists, hiding the base below and the underside of the deck. Corner Trims can be installed over corners to create a neat finish, and Bullnose Boards can round off the outside edge of a decking area.
HOW TO INSTALL BULLNOSE BOARDS
Using Speeddekz 65mm Wood Screws, insert at an angle through the supporting Joist underneath the Board. Ensure the Bullnose Board is supported along the length, with Joists and a Screw inserted into each one. Two Screws are recommended across the width of the Board at regular intervals, inserted 13mm from the edges of the Board. After securing the front of the Board, secure the centre into the Joist below, followed by the end of the Board. Once the Board is securely in place, fix the Board at several intervals. We recommend using 11 Screws per 4m Board, with a T-Clip to secure internally.
HOW TO INSTALL FASCIA BOARDS, SKIRTING OR CORNER TRIMS
Using 50mm SPEEDDEKZ Deck Screws, fix the ends of Fascia Boards or Corner Trims to the Joists or Boards behind. Ensure the Screws are inserted 13mm from the edge of the Fascia Board or Trim. Continue fixing 300mm after each Screw. Alternatively, you can use a strong adhesive (CT1) to secure the Boards or Trims. For optimum results, alternate between Screws and adhesive every 150mm until the Board or Trim is fastened securely.
NEED TO REPLACE IMAGE
FASCIA BOARDS
Once the Bullnose Boards have been installed, you may wish to add the matching Fascia Boards to the Decking installation.
Fascia Boards can be fitted to the exposed Joists, hiding the base below and the underside of the deck.
CT1 ADHESIVE
When using CT1 Adhesive, do not allow the Adhesive to get on the Decking Boards, as this can damage the finish of your Decking.
END CAPS
End Caps are used to seal the ends of Hollow Composite Decking Boards. They may require sanding due to being a tight fit. Ensure the End Caps are not forced into place as this may cause them to snap.
Aftercare and Maintenance
COMPOSITE DECKING MAINTENANCE
It is important to keep your Composite Decking clean and free from debris and dirt to ensure a long-lasting Decking area.
To keep your Composite Decking well maintained, we advise avoiding:
- Dragging furniture or plant pots across the Decking.
- Dropping heavy items onto the Decking (such as large plant pots, trees, BBQs and furniture etc)
- Using items with metal feet without a suitable padding material between the feet and the Decking to avoid scratching or damaging the Decking.
- Using corrosive or strong chemical treatments such as bleach, or making contact with suntan lotion or insect repellent, which could cause discolouration.
As a Composite material, Cladco Composite Decking Boards will naturally accumulate dirt when exposed to outdoor conditions. For everyday debris such as plants, leaves, berries, or animal droppings, simply brush your Decking with a broom and warm, soapy water.
FIRE AND HEAT SOURCES
Precautions should be taken when using fire pits and BBQs on Composite Decking. We advise a protective surface is laid between the fire pit or BBQ and the Decking. You should ensure the fire pit or BBQ is secure and does not wobble or move. 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 MILDREW
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 mould is removed often. If mould is present, use soapy, hot water or Decking Cleaner to remove. In cases of more stubborn dirt or grime, pressure washing may be necessary to restore the Decking’s appearance.
SNOW AND ICE
Take care when walking on your Decking in extreme weather conditions, such as snow or ice, as it may become slippery.
If using de-icer, ensure it contains calcium chloride, which will not damage your Decking. It may leave a slight residue but this can be easily cleaned away. Always test chemicals on an inconspicuous area of your Decking.
Avoid grit or sand, as well as metal or plastic spades, on your Decking as they may scratch the surface.
1
Use a broom to remove any debris, such as leaves, from the Decking to create a clear surface ready for cleaning.
2
Prepare a bucket of hot soapy water or grab a bottle of Composite Decking Cleaner.
3
Apply the hot soapy water or Cleaner to your Decking. Once applied use a broom to scrub the surface of the Decking. Any surface debris will start to lift off.
4
Leave the hot soapy water or Cleaner on the surface for several minutes before rinsing. Ensure all Cleaner, soap and debris have been successfully removed from the Boards before leaving to dry.
