Fire & Safety

Decking

In a residential setting, in the UK, Millboard Decking products should not be used for balconies or roof terraces (or cladding), where the total building height is above 11m.

This may not necessarily apply in a commercial environment, please ensure that the appropriate professional advice is obtained, prior to the start of any project.

Millboard decking has been tested to BS EN 13501-1 previously and we are undergoing recertification in 2025.

If you plan to use Millboard products for internal applications, please ensure that you speak with one of our technical representatives so that we can understand the nature of project and advise accordingly.

Please note: When the decking boards are used in a cladding application, the suitability of the product for this use 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.

Guidance should be gained from the government website relating to the geographical project location.

Envello Cladding

Our Shadow Line+ and Board & Batten+ cladding boards have been tested to BS EN 13501-1 and have a classification of D-s3, d0 when fitted in accordance with our install guide.

Envello cladding is extremely versatile and can be used for most low-level cladding areas (subject to building control). It can be used for cladding on low-level residential and commercial buildings, garden rooms, home offices, furniture, soffits and fascia, outdoor kitchens and more. Envello cladding can be used as the decorative face for most outdoor designs, as long as it is fixed to a structural element.

All areas subject to the relevant government regulations/building standards.

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.

If you plan to use Millboard Envello products for internal applications, please ensure that you speak with one of our technical representatives so that we can understand the nature of project and advise accordingly.

Where heat sources are in prolonged proximity to the boards, the board surface may become affected. We would recommend keeping any heat source 1m away from the board surface, non-combustible materials should be used in these areas. In instances where there is burning wood or coal, they will need to sit the fire bowl / brazier onto a porcelain or cement tile / slab. The slabbed area needs to extend about 1m outside the fire bowl / brazier. Any embers or burning material needs to be removed immediately to prevent any damage or lasting marks to the Millboard surface. Patio heaters or infra red heaters are not known to affect the boards.

As with all composite products, the surfaces of the boards tend to be hotter than wood when exposed to direct sunlight. Darker colours particularly will feel hotter and may be uncomfortable to walk on in bare feet. Under direct sunlight and high temperature, footwear may be necessary. Special caution should be taken when using decking in areas by heat/UV reflective glass, or around pools.

When the boards are first laid they still have a release agent on the surface, this will come off within 6-8 weeks due to natural weathering and usage.

Surface water will always be more prevalent on Millboard due to it being made from a non-porous composition. Laying the boards to a slight fall away from a building will help to drain the water off the surface, however it will not drain all of the water off the boards. Adhere to relevant gapping on the sides and ends of the boards as per the installation guidance to assist drainage, the boards have a cupping tolerance of 2mm. Surface water can be taken off the surface of the boards with a brush or large squeegee, frost or ice can be removed by spreading white salt across the board surface. When the boards are first laid they still have a release agent on the surface, this will come off within 6-8 weeks due to natural weathering and usage. The release agent means that the water will form beads or globules over the surface of the boards, once this release agent has come off the water will dissipate across the board surface.