20mm Engineered Wood Flooring
20mm is the heaviest engineered wood specification we stock and effectively the closest you can get to a solid timber floor while still keeping the dimensional stability of an engineered construction. The board carries a thick oak wear layer — typically 6mm — which means several sanding and re-finishing cycles over the life of the floor, and the 20mm overall depth gives a particularly substantial feel underfoot.
20mm is offered selectively across GF by Grosvenor Flooring and V4 Wood Flooring — most often in V4’s wide-board plank collections such as Alpine, Heritage and Tundra.
When to Specify 20mm
20mm is the right call when build-up height is not a constraint and you want the thickest possible oak wear layer for long-term refinishing. It is a long-term-investment specification — the floor that gets sanded back and refinished a generation from now rather than replaced. If you do not need the extra wear layer thickness, 14mm or 15mm remains the more common premium spec.
Construction & UFH
Multi-ply core, real European oak wear layer (typically 6mm), UFH compatible (max 27°C). Note that thicker boards transfer heat slightly less efficiently than slim profiles — discuss with your fitter if UFH performance is the top priority.
Where to Use 20mm Engineered Wood
Any dry room — typically specified in whole-house projects spanning lounges, dining rooms and hallways in higher-end refurbishments.
Explore Related Categories
- Other thicknesses: 9mm, 10mm, 11mm, 14mm or 15mm.
- By format: plank, herringbone or parquet.
- Brands: GF own-brand or V4 Wood Flooring.
How to Buy or Get a Quote
For GF: full online checkout, free samples and UK delivery. For V4: Request a Price via our enquiry form, WhatsApp or phone.
Frequently Asked Questions
Why choose 20mm instead of thinner engineered wood?
20mm boards feel almost indistinguishable from solid timber underfoot, come with the thickest wear layers (4–6mm), and can be sanded multiple times. They're the specifier's choice for heritage projects and homes where the floor is expected to last generations.
Can 20mm engineered wood go over underfloor heating?
It can, but thicker boards transfer heat more slowly than 10–15mm alternatives and may not be suitable for every UFH system. Always check the specific product's UFH certification before committing.
What installation method does 20mm engineered wood use?
Most 20mm boards are glued down to a prepared subfloor or secret-nailed to battens — click systems aren't generally offered at this thickness because the boards are too heavy to benefit from floating installation.
