Fire performance: be honest about the requirement.
Timber cladding can be specified responsibly, but it depends on the building type, height, location, boundary conditions, and the exact compliance route you’re following. If you need a system that supports a fire strategy, start with the correct treatment/specification rather than hoping to retrofit the answer. For projects where a fire retardant route is required, review fire rated cladding treatment early, before you buy material and commit to a profile.
When ThermoWood is the right choice—and when it isn’t.
If you want stable boards, clean modern lines, and a timber façade that behaves itself, ThermoWood is usually a strong pick. If your priority is a very specific grain character or you want a naturally more resinous, denser feel, you might prefer larch. If your aesthetic is bold and black with texture, you’re in a different lane entirely—look at Shou Sugi Ban wood instead. The point is to match the timber to the outcome you actually want, not the trend keyword.
Buying ThermoWood cladding online (without getting it wrong).
Before you place the order, know your elevation areas, your openings, your waste factor, and your detailing approach (corners, reveals, soffits). Decide whether you want to hold colour or let it weather. Then choose the profile that matches the building style rather than forcing a profile to do a job it doesn’t suit. When you’re ready to specify or order, browse available: ThermoWood cladding and check current UK stock. If you want pricing and advice aligned to your exact build-up, use Request a Quote and include elevation photos/drawings, approximate m², and your target finish.
Frequently Asked Questions
How long does ThermoWood cladding last?
With correct detailing (ventilated cavity, appropriate fixings, and sensible ground clearances), ThermoWood cladding can deliver a long service life in UK conditions. Longevity depends more on the wall build-up and exposure than the boards alone. Left untreated, ThermoWood will typically weather to a silver-grey while remaining structurally sound, provided moisture is managed and end grain is protected where needed.
Is ThermoWood cladding fire rated?
Fire performance is always a system question: timber species, profile geometry, coatings/treatments, cavity design, and cavity barriers all influence compliance. If your project requires a defined fire performance outcome, start with the requirements and then select a system (including barriers and any treatment) that meets them. For guidance, see our fire-rated timber cladding overview.
Does ThermoWood need treatment or regular maintenance?
ThermoWood can be left untreated to weather naturally, which is a common low-maintenance approach. If you want to retain the original brown colour for longer, you’ll need a suitable exterior oil or coating and a maintenance cycle based on exposure (south-facing elevations typically need more attention). The key is choosing a finish compatible with thermally modified timber and applying it consistently across elevations.
What is ThermoWood cladding cost per m² in the UK?
As a working budget guide, supply-only ThermoWood cladding is commonly in the £45–£95+ per m² range, with factory-coated or colour-finished options often higher. Total installed cost depends heavily on access, elevation height, substructure, membranes, fixings and detailing. For live profile options and availability, browse ThermoWood cladding products.
Is ThermoWood better than Siberian Larch for external cladding?
“Better” depends on what you’re optimising for. ThermoWood typically wins on stability and predictable movement, which can reduce cupping and board distortion over time. Siberian larch is naturally durable and can be excellent, but it often shows more natural variation and can move more depending on grade, profile and exposure. If you’re deciding between the two, see our comparison guide: ThermoWood vs Siberian Larch.
Can ThermoWood cladding be installed as a ventilated rainscreen?
Yes. ThermoWood is commonly installed on a ventilated batten system to promote drying and reduce moisture risk behind the façade. The critical points are ventilation (top and bottom), correct fixings, consistent batten spacing, and appropriate detailing at junctions. Where required, include cavity barriers and follow project-specific compliance requirements.
