Low-maintenance grey timber: Why Accoya® Color Grey is a smart choice.

Pre-Coloured vs Naturally Weathered Timber

The growing demand for grey timber finishes reflects wider architectural trends: clients and designers increasingly seek natural materials, low-maintenance solutions, and contemporary aesthetics. Both naturally weathered timber and pre-coloured options offer unique benefits, but the choice depends on the project’s priorities.

For some, the beauty of timber lies in its ability to evolve over time. Naturally weathered timber gradually develops a muted grey patina, with subtle variations influenced by UV exposure, orientation, and the environment in which it sits. This organic transformation gives façades a unique character, making naturally weathered timber an established choice for projects that value individuality and natural variation.

While natural weathering has its own appeal, pre-coloured timber such as Accoya® Color Grey delivers an instant solution with a grey aesthetic straight from day one. Following Accoya’s acetylation process, the timber undergoes an additional dyeing stage that colours it all the way through from surface to core using an organic black pigment giving it a grey hue that permeates the wood. This envelope treatment ensures that the colour won’t fade, peel, or wear away over time, even when the timber is cut or profiled, making it an ideal solution for projects where immediate visual impact and low maintenance are key.

Why Choose Accoya® Color Grey Cladding?

Accoya® Color Grey brings all the benefits of Accoya® wood with the added advantage of a pre-greyed finish. The timeless look of premium grey wood is infused throughout every board for a rich, authentic finish that enhances any exterior. Like natural Accoya®, it offers Class 1 durability, meaning exceptional resistance to rot and decay, alongside outstanding stability with minimal shrinkage or swelling. Accoya® Color Grey is also sustainably produced, being one of the few building products to achieve Cradle to Cradle® Gold Certification. It is non-toxic, supports a circular economy, and provides specifiers with confidence in both environmental performance and longevity. This is backed by a 50-year warranty above ground (25 years in-ground or in fresh water) ensuring peace of mind for specifiers and homeowners.

Because the colour runs through the timber’s core, the grey finish cannot flake, peel, or wear away ensuring minimal maintenance, with no need for coatings. As a result, Accoya® Color Grey not only maintains its striking appearance but also reduces costs over a lifetime and saves time on upkeep.

What to Expect from Accoya® Color Grey

Like all timber, Accoya® Color Grey is a natural material. Its colour stability is exceptional, but small changes may occur depending on exposure, angle, and environment. For example, façades at different orientations will experience varied weathering patterns.

Weathering tests, carried out on timber at a 45° angle in outdoor conditions, show that Accoya® Color Grey retains its beautiful tone over time. As with all timber products regular cleaning is recommended to keep it looking its best.

Frequently asked questions