Composite Decking Joists

Composite decking joists, pedestals and fixings

Millboard decking has many advantages over natural timber, including that it doesn’t rot, split or warp. Wood’s inherent flaws mean that it is not the ideal material for creating structures to support decks, as for providing the floor surface to the deck itself. That’s why we have developed a range of composite decking joists, bearers, pedestals and fixings that will last as long as our beautiful boards.


Plas-Pro is the sub-frame material we have created as the perfect support system for our all-weather flooring. It provides a durable, hardwearing and practical base for Millboard decks and, because¬ it is made from 100% recycled plastic, it can be used even in and around water. This makes it ideal for supporting not just garden decks, but jetties, fishing platforms, roof terraces and boardwalks.

Composite Decking Joists

Plas-Pro posts, bearers and joists can be combined to create sub-frames of every shape and size.

Plas-Pro 50 x 50mm bearers are designed to be used in conjunction with our cradles or pedestals when installed over a solid and stable surface, such as a roof, while Plas-Pro 100 x 100mm posts are for use in conjunction with Plas-Pro 125 x 50mm joists when installation is over a soil or earth base. These composite decking joists can be used with spans of up to 400mm in residential applications, or up to 300mm in commercial and public settings.

Durafix® fittings

Millboard decking can be constructed with screws, just like wood, but without the danger of it splitting. We recommend our Durafix® screws, which can be driven in with no pre-drilling, counter sinking or clip fixings needed. Our decking’s special Lastane® surface will self-heal over Durafix screw heads to provide an instant and very attractive ‘Lost Head’ effect.

Composite Decking Joist Screws

Pedestals and joist cradles

Completing the Millboard sub-frame system are our composite decking joist cradles and pedestals.

Our joist cradles are ideal supports for use in spaces where there is limited height available to accommodate a deck and its sub-structure, especially on roof terraces and patios. They are adjustable to allow joists to be raised off the base by between 10-40mm, allowing water to flow unhindered beneath the joists and so minimalizing debris build-up. The foam pad on the underside of each cradle also offers an acoustic benefit to help reduce sound transfer.

Our adjustable, self-levelling pedestals are ideal for raised decks and terraces, including ones where pipework and services run beneath the surface. Each has a self-levelling head for easier, faster and stable installation. They spread the weight of joists evenly, creating a sturdy support, and are available in five adjustable sizes, providing a height range from 40-210mm. Where more height is required, this can be achieved using our 100mm Extension Collar.


There is a network of Millboard Approved Installers who are expert in using our decking boards and sub-frame system to create beautiful outdoor spaces. Find the one nearest you here.

Composite Decking Joists

Composite decking fascias and edgings – complete the look

Complete the look with decking edging

When fitting composite decking, small finishing touches can lift your deck to the next level. That’s why we offer decking edging that has the same attention to detail as the rest of our products. Unlike others on the market, our edging continues the beautiful wood grain right round the edge profile to maintain the authentic wood look throughout.

Decking Edging Flexible Smoked Oak

It comes in the all the colours of the Millboard range, so you can use it to match or contrast as you choose. Choose from either straight or bullnose profiles (unique to Millboard) to create the look you want. Flexible edging is also on hand to fit easily around curved edges for a truly distinctive finish.

Besides our decking edging’s visual appeal, it is designed to resist high wear points, so great looks are combined with great performance (just like all Millboard’s products!).

Not just decking edging – fascias too!

Where your deck has multiple levels or steps, our fascia collection retains the same attention to detail that enables the perfect match. Like our edging, our fascias come in all the Millboard colours, and feature the same beautiful grain.

Smoked Oak Bullnose Edging

A new addition: Bullnose Board

This 150mm board has a bullnose profile to one edge, giving a stylish finish without the need for a separate edging strip. It opens up a whole new range of possibilities, from under-lip lighting, to coping for planters and seating. And it provides great stability and ease of installation on steps and other exposed edges.

Our edging and fascia options deliver a finish that adds distinction to any setting. They are just another facet of the Millboard decking system that lifts it above timber decking and conventional composite decking.

Find out more about our range of decking edging and fascias. Or, if you have any questions, we’d be delighted to help. Just call us on 024 7643 9943. .

How to VIDEO – Installing Millboard Esterno with a Pedestal

How to install Esterno Porcelain Flooring: Here is the latest in our ‘How to’ videos. This time, we are focusing on installing Millboard Esterno with a pedestal.

Take a look and see for yourself the Millboard way.

Esterno does not run the risk of material delamination as it is a single solid material bond. Esterno reduces weight and thickness when compared to standard paving.

For more details on Esterno Porcelain Flooring, click here.


Millboard Accessories – Composite decking pedestals

Millboard Composite Decking Pedestals

With Millboard composite decking pedestals, it’s not just the composite decking boards that are premium and sought after, it’s also our distinct range of essential additions to ensure the perfect fit and performance for your outdoor space.

Our adjustable pedestals are ideal for composite podium decks and terraces. Their smart design allows pipe work and services to be laid beneath Millboard, while also improving breathability and preventing rot. The weight of the joists is spread evenly, creating a sturdy support, and they’re available in incremental adjustable sizes from 300 up to 600mm tall, giving you complete control of the height of the area.

Number per m2*
Residential 5.0
Commercial 8.0

* Approx number – quantities may vary according to project design


Performance, maintenance and durability. Specifiers and clients should consider the effect of short, medium and longer term values. Not only the initial price, but also the cost of ongoing maintenance, liability for safety, accessibility and residual aesthetic value in the project going forward.

Millboard launch in new Chelsea location!

You are invited to come and experience the beauty of Millboard Premium Outdoor Flooring in a new display location at The Chelsea Gardener, SW3. Millboard has teamed up with David Salisbury Outdoor Rooms to create a stunning customer area that showcases a splendid orangery surrounded by the Millboard Collection of wood-free composite decking and the launch takes place next week.

When: Tuesday 25th April from 4pm to 8pm for Architects and Designers only
Or: Wednesday 26th for all Trade, Architects and End Consumers, from 10am to 5pm
Where: Inside The Chelsea Gardener, 125 Sydney Street, London, SW3 6NR

Please note visits after 26th will need to be by appointment booking only.

If you would like to join us you can RSVP here.

Inspire, select, build, enjoy. It’s your Millboard

Millboard 2017 Brochure

Millboard 2017 Brochure: Premium wood-free outdoor flooring brochure is now available. The lifestyle-inspired new brochure captures the endless possibilities that Millboard can bring to outside living. The Millboard collection has a choice of styles, finishes and colours that have been expertly pieced together, telling the story via beautiful end-user location photography.


Millboard can transform any outdoor space with minimal effort, creating a lavish outdoor living room or entertaining space to share with family and friends, or just a relaxation space, this unique wood-free composite can lend itself to a myriad of applications.

Millboard is focused on continued sustainability and they have become the first premium outdoor flooring company in the world to have their carbon footprint independently verified.

Download the new Millboard Brochure or request a copy here.

Frosty Millboard?

With all of the recent frost and in some parts of the UK snow, you may be wondering the best way to keep your Millboard frost-free. It’s very simple, all you need is a good sprinkling of table salt and your deck will be the envy of the frosty landscape surrounding it.



Are you sitting comfortably? Let the Millboard story begin

The world’s finest resin, composite outdoor flooring company Millboard has launched a video that guides you through their processes from design to the R&D that goes into the manufacturing of their premium boards.

Millboard®, has launched a video that encapsulates the very essence of the company, their values and heritage. Based in Warwickshire, the British family-run business employs over 120 dedicated people who have helped to shape the Millboard brand for over 20 years.

At Millboard, creating exceptionally crafted products is personal. Two generations of the Douglass family keep a watchful eye over every aspect of Millboard R&D and production, their skills honed over many years. To create a composite design with the beauty of real wood, they searched far and wide for the finest hardwood from which to mould the Millboard collection.

Millboard Director, Jerry Douglass, handpicks each timber personally, sifting through hundreds of specimens until he finds the winning combination of characterful grain and perfectly imperfect knots. The 100-year-old oak used to create our bestselling, beautifully age-worn Weathered collection was found in the rural countryside and originates from the floor of a French railway carriage. We were granted special permission to borrow and mould from them, before returning these rare finds to their owner. (more…)

Complete the look with our fascias & edgings

Because the finer details matter, the Millboard fascia & edigings collection discreetly works with your choice of Millboard, ensuring the final look is seamless. Available as standard or ultra-flexible to suit your space, they are available to match every colour of Millboard, so that your outdoor space flows as one and every inch has the distinctive Millboard look and feel.

Our Fascia collection works perfectly for areas with multiple levels and steps. Every space is unique, which is why our fascias are available in a variety of colour options to help you create the perfect look.

If your project  has a curved surface area, they are also designed to fit the contours of any space. Millboard edging trim must be fixed at 300mm intervals along its length while easing the profile around the bend. The edge trims come in 7 colours which can be used to match the decking boards, or used as a contrast for design or to assistance partially sighted persons on applications open to public usage.

Choose Bullnose for a subtle look or Square Edge for added interest and to work perfectly with our textured designs. Millboard Edging lends every space an elegant, framed look.

Bullnose & Square Edge edging
Size: 50 x 3200 x 33mm

You  can download a brochure here.

Why choose Millboard this summer?

So British summertime isn’t quite happening despite us heading towards June at a rate of knots, but that shouldn’t stop you from planning your dream outdoor space for when the sun does decide to grace us with it presence!

Whatever the size of your space, there’s a Millboard solution that can be enjoyed for years. From country retreat, to city chic, we can guarantee that you haven’t experienced true outdoor living until you’ve relaxed on one of our alternative decks.

We combine the natural beauty of real timber with the high performance of our unique wood-free material, it is non-porous, which means high resistance to algae growth and excellent anti-slip properties. All of our Millboard products are scratch and stain resistant, making it a perfect base for summer BBQs and even hot tubs.

View the complete Millboard Collection here or download a brochure.