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What makes Millboard composite cladding unique?

Millboard composite cladding is 100% wood-free, so it doesn't need capping to protect it from the elements. Using a unique fiber-glass reinforced resin-mineral composition, Millboard achieves the finest quality of finish, balanced with usability and maximum durability.


This gives Millboard composite cladding many of the unique benefits our decking products have, allowing it to outperform even nature itself, with no other cladding solution being anything like Millboard - composite or otherwise. Read on to explore our two composite cladding ranges, Board & Batten and Shadow Line.

The Board & Batten Range

The Board & Batten composite cladding profile creates a truly unique balance for both contemporary and traditional designs. With a tongue and groove profile that only requires fixings through the tongue, ensuring the fixing is hidden.


Our Board & Batten collection has been moulded from individual pieces of timber with a range of different masters, creating a truly unique balance for both contemporary and traditional designs. With a tongue and groove profile that only requires fixings through the tongue, the install time is dramatically reduced compared to the traditional method of timber batten-on-board cladding. The profiles on the Board or Batten are designed with differing angles to create shadow definition between the grain patterns, as well as facilitating drainage when used horizontally. Typical usage requires 1.53 boards per m².

The Shadow Line Range

The Shadow Line composite cladding board has been designed to perfectly replicate smooth timber with a flat grained finish, giving a clean authentic look.


The increased width of the Shadow Line board compared to standard timber boards means that there is larger grain detail. This gives an enhanced visual impact, without the risk of the board twisting or warping over time. The Shadow Line board has been profiled with oblique angles to prevent water collecting between two profiles, as well as helping rain water wash over the face of the cladding. The indent created between boards gives visual definition to the individual grain patterns. Typical usage requires 1.53 boards per m².

Please be aware that our Envello ranges are not currently fire rated

Millboard Envello cladding boards are crafted with fire retardants in the board composition, however, they are not fire rated and carry no ‘reaction to fire’ certificate. The responsibility for the cladding’s suitability in the required location is to be determined by a certified building professional (building control, building insurance, fire officer, etc). Millboard will not be held responsible for incorrect specification, application, or product installation in areas not in accordance with government guidance, in the UK or abroad. Current guidance should be gained from the government website relating to the geographical project location.

Envello Cladding Literature

  • Board & Batten Composite Cladding Specification pdf 259.882 KB

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  • Shadow Line Composite Cladding Specification pdf 755.463 KB

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  • Board & Batten Composite Cladding - Horizontal Install Guide pdf 25.176 MB

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  • Board & Batten Composite Cladding - Vertical Install Guide pdf 24.645 MB

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  • Shadow Line Composite Cladding - Horizontal Install Guide pdf 27.82 MB

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  • Shadow Line Composite Cladding - Vertical Install Guide pdf 25.283 MB

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