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MEDITE TRICOYA EXTREME Durable MDF is a groundbreaking construction material.

The panel exhibits outstanding durability and dimensional stability which allows it to be used in applications once limited to products such as concrete, plastics or metals. With the added benefits of light weight, sustainable raw materials and a guarantee of up to 50 years above ground and 25 years in ground, these groundbreaking panels provide architects, specifiers and designers with an entirely new construction material, allowing great design flexibility and endless opportunities for creativity.

The combination of acetylated wood fibre with the manufacturing technology of MEDITE MDF means it may now be used in situations and applications where normal MDF panels cannot. However, MEDITE TRICOYA EXTREME maintains all the design, fixing, machining flexibility of medium density fibreboards.

At a glance

  • MDF guaranteed outdoors for 50 years
  • Outstanding durability and dimensional stability
  • Resistant to rot and fungal decay
  • Smooth surface
  • Consistent quality and thickness
  • FSC® certified
  • CARB2 compliant

Our technical sales team can help you find the right product

Contact us +44 (0) 1322 424900

Specification and sizes

MEDITE TRICOYA EXTREME MDF is available in a range of sizes and thicknesses. Other sizes available on request.

Panel Size
1220 x 2440mm
4, 6, 9, 12, 15, 18mm
Panel Size
1220 x 3050mm
12, 15, 18mm


The potential applications for MEDITE TRICOYA EXTREME are far ranging and will inspire creativity and discovery, particularly in environments where humidity and weather are usually concerns. Given the design flexibility of MDF, it is now possible to imagine MEDITE TRICOYA EXTREME used virtually anywhere.

Features and Benefits

MTX Icons


MEDITE TRICOYA EXTREME is a revolutionary wood based panel product, enabling its use in applications and environments that could not previously be contemplated. The raw material for the panel is modified to give outstanding dimensional stability and durability using a non-toxic environmentally compatible process.

Product Performance

Acetylation process

Many of the benefits observed in solid acetylated wood, including enhanced dimensional stability and durability and fungal resistance hold true for MEDITE TRICOYA EXTREME.

MEDITE TRICOYA EXTREME is also made using a high performance resin which is no added formaldehyde, which makes the product not only exceed EU E1 but also CARB2 compliant.

BBA Assessment: As from June 2012 the British Board of Agrément has concluded that MEDITE TRICOYA EXTREME is satisfactory for internal and external use as a non-structural general wood based product. It is considered that this could form the basis of an assessment leading to the award of an Agrément Certificate after full commercial production is established. BBA Assessment number M2/49109.

The functionality and versatility of wood-based composite panels give them universal appeal. When properties such as high strength, light weight, good insulation, excellent machinability and ease in use are required, MEDITE MDF is the ideal choice for many applications.

RIBA Approved CPD

If you are a RIBA Architect and would like to learn more about extreme durable MDF, we have experienced technical sales managers that are able to present a CPD at your practice so that you and your team can gain valuable knowledge on MEDITE TRICOYA EXTREME, how it is made and how it can be used.

It will help you to understand the following topics:

  • What is wood modification via acetylation method?
  • What is Extreme Durable MDF?
  • What tests have been done on Extreme Durable MDF?
  • What are Extreme Durable MDF leading uses?

Case Studies

Road with Innovation sign on a roundabout

MTX Innovation at Waterford Institute of Technology

Waterford Institute of Technology (WIT) is making a statement, and MEDITE TRICOYA EXTREME (MTX) MDF is spelling it out.

Unique domes created with MEDITE TRICOYA EXTREME: When the future meets the present

L&R Unique Joinery has just launched their latest high-quality, sustainable innovation: all-wood geodesic domes made of the ground-breaking MEDITE TRICOYA EXTREME
MEDITE SMARTPLY logo on grey background

MEDITE TRICOYA EXTREME is the ideal panel for paintings at Children's Hospital Garden

An artist has used MEDITE® TRICOYA® EXTREME (MTX), a weather resistant MDF, to ensure her six original paintings could continue to be enjoyed for up to 50 years
Hammersmith Station

MEDITE TRICOYA EXTREME used in distinctive planters at Hammersmith Station

The busy business hub of Bradmore square in Hammersmith, west London, has been newly reinvigorated by the Edible Bus Stop®
JB Kind Thames Extreme lifestyle

MEDITE® TRICOYA® EXTREME the perfect material for JB Kind’s External Extreme Doors

A front door is often the first feature of a home we notice. Painted every colour, reflecting every personality and lifestyle
MTX Bathroom

MEDITE TRICOYA EXTREME and MEDITE MR used to remodel luxury bathrooms in opulent art deco style

A luxurious London home has recently had its two bathrooms completely refitted with MEDITE TRICOYA EXTREME (MTX) and MEDITE MR MDF

Luxury Caribbean house resists humidity with MEDITE TRICOYA EXTREME

Situated on an exclusive Caribbean island, luxury private residence Casa Blanca underwent a specialised interior refit
exterior cladding

MEDITE TRICOYA EXTREME: ensuring the long life of exterior cladding

A unique private residence near London Bridge has used the extreme durable MDF, MEDITE TRICOYA EXTREME (MTX)

MEDITE TRICOYA EXTREME Adorns Vintage London Shopfront at Chelsea Flower Show

The quintessential English garden is elegant, refined and made to withstand the changeable English weather stoically, from a spring drizzle to a hailstorm.

Durable weather resistant MDF creates stunning roof terrace and BBQ area

A once neglected roof terrace on the top of a luxury private residence in South Kensington has been transformed by Paul Newman Landscapes
Life-Sized Gingerbread House

Life-Sized Gingerbread House uses MEDITE TRICOYA EXTREME

Quite possibly one of the most unique building projects that MEDITE SMARTPLY has been involved in for a long time, the Savalen Hotel
House Of Heroes

Sweden’s Safe Sanctuary: ‘House of Heroes’ children’s recovery centre is built with MEDITE TRICOYA EXTREME

A hospital facility in Norrland, Sweden has been renovated extensively with wood-based products,
Eccleston place


MEDITE TRICOYA EXTREME (MTX) now adorns the shopfronts of over 30 high-end retail and design spaces at the new Eccleston Place hub

MEDITE TRICOYA EXTREME gives 25 year guarantee to Oxford Planters

Owing to the durable MEDITE TRICOYA EXTREME (MTX) panels from which they’re made, Oxford Planters handcrafted planters
WW Chairs

Talking chairs at Chester Zoo take you to a whole new world with MEDITE® TRICOYA® EXTREME

Chester Zoo’s Wild Worlds Festival is officially open, bringing a new twist to teaching children about the animal world
Mountain climbing

MEDITE TRICOYA EXTREME provides solution for Coniston Mountain Rescue

The Lake District is perhaps best known for its rolling hills and picturesque lakes, but it also has one of the toughest terrains
Lights header

Beautiful Trubridge Lights made with MEDITE TRICOYA EXTREME

Leading designer and maker of contemporary lighting, David Trubridge, has made use of MEDITE® TRICOYA® EXTREME in an innovative outdoor lighting

Shou Sugi Ban effect on MEDITE TRICOYA EXTREME

Shou Sugi Ban is a Japanese term for the ancient art of charring timber to both preserve the wood and give it a unique burnt finish
Yellow House

Mudeford Huts created with MEDITE TRICOYA EXTREME

MEDITE TRICOYA EXTREME provided the high . performance, water-resistant cladding
Osb man cut out

Cycling safety signs made using MEDITE TRICOYA EXTREME

Colourful directional figures made of MEDITE TRICOYA EXTREME now point out a safe route to school for children in Billund, Denmark
Coillte Prisma Gemiva

MEDITE TRICOYA EXTREME provides solution for Dutch School

Prisma Gemiva school in Alphen aan den Rijn, Netherlands, is a secondary school that accommodates 120 children
Funicular Folly

MEDITE TRICOYA EXTREME used to create structure for Funicular Folly

The unique dimensional stability of MEDITE TRICOYA EXTREME (MTX) allowed it to be used in the construction process
Dancing with the wind

Impressive Garden Sculptures made from MEDITE TRICOYA EXTREME

The impact of digitisation on contemporary culture has provided inspiration for the work of Rotterdam-based artist Ton Kalishoek
Full Size Render

High end courtyard installation made from MEDITE TRICOYA EXTREME by Medici Developments

Medici developments is known for creating aspirational homes that leave a lasting impression. Developing luxury, high-end properties
Steels in a field

Alex Devereux creates unbelievable sculptures from MEDITE TRICOYA EXTREME

London-based artist Alex Devereux’s unique use of MDF is leaving audiences scratching their heads for all the right reasons.


MEDITE MR is a moisture resistant MDF which can be used in interior humid conditions such as kitchens and bathrooms. MEDITE MR should not be used in external environments. MEDITE TRICOYA EXTREME and MEDITE EXTERIOR are exterior grade MDF products that can be used in exterior wet/humid conditions.

Yes. MTX Usage Guidelines and MTX Storage & Handling Guidelines are available on the website.

Moisture ingress behind a coating system can lead to small blisters or crystalline deposits appearing on the board. This can usually be identified by the appearance of ‘tide marks’ on the board. Should this occur the board can be successfully refurbished by the removal of the existing coating and re-application. Our guidelines for doing this can be found here.

MTX is guaranteed for 25 year in-ground and 50 year above ground. Please contact us for further information on this guarantee.


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