The Enemy: Specifying on Appearance Alone
Flooring retailers sell on visuals. The samples look identical. The lifestyle photography is identical. The pricing is often similar. What the display does not show you is the wear layer thickness, the core material, the subfloor moisture requirements, or the installation constraints that determine whether the floor is right for your project.
At RCB, we specify flooring based on the project conditions first: what is the subfloor, is there underfloor heating, what is the foot traffic level, who will occupy the property, and what does the maintenance requirement need to be. Then we look at aesthetics. Here is the framework.
Flooring Types: A Performance Comparison
Engineered Wood
Real wood veneer over plywood or HDF core. Best visual outcome in living spaces. Suitable for underfloor heating when correctly rated. Not fully waterproof — avoid in bathrooms. Specify minimum 3mm wear layer for residential use — allows at least one sanding and refinish. 20-25 year lifespan with proper care.
LVT (Luxury Vinyl Tile/Plank)
Fully waterproof, extremely durable, comfortable underfoot, wide visual range. Best all-round specification for kitchens, bathrooms, and rental properties. The specification choice depends entirely on wear layer thickness — see the section below. Compatible with underfloor heating (check maximum temperature spec per product). 15-20+ year lifespan at 0.55mm wear layer.
Porcelain and Ceramic Tile
Hardest wearing option. Permanently waterproof. No wear layer degradation. Best for bathrooms, kitchens, and outdoor areas. Cold underfoot without underfloor heating. Grout lines require maintenance. Installation is higher cost due to substrate preparation, adhesive, and grout. Excellent 30+ year lifespan when installed correctly.
Laminate
Photographic image layer over HDF core with a thin wear layer. Looks like wood or stone but is neither. Not waterproof despite some marketing claims — the locking joints admit moisture over time. Lower cost but shorter lifespan than engineered wood or LVT. Acceptable in low-traffic bedrooms or budget renovations. Do not specify in kitchens, bathrooms, or high-traffic areas.
Natural Stone (Marble, Limestone, Slate)
Premium visual outcome, genuinely unique. Heavy — structural loading must be checked, particularly on upper floors. Porous and requires sealing. Cold underfoot. High installation cost due to weight and preparation requirements. Excellent lifespan when maintained. Best suited to owner-occupied properties where the maintenance commitment is understood.
LVT Wear Layer: The Specification That Actually Matters
All LVT looks the same on a sample board. It does not perform the same. The wear layer is the transparent protective layer on top — this is what stands between the decorative surface and daily foot traffic.
0.2mm
Budget domestic. Expect 5-7 years.
0.3mm
Light residential use. 7-10 years.
0.55mm
Standard residential spec. 12-15 years.
0.7mm+
Heavy residential / light commercial.
Budget LVT with 0.2mm wear layers is frequently marketed with “heavy duty” or “commercial grade” language in product listings. This language refers to the embossing pattern, not the wear layer. Always check the specification sheet — the wear layer thickness will be stated in mm if the product is worth specifying.
Subfloor Preparation: Why It Matters More Than the Floor
Every flooring manufacturer requires the subfloor to meet specific flatness and moisture tolerances. These are not suggestions — they are conditions that determine whether your warranty is valid and whether the floor performs as specified.
- LVT: maximum deviation 3mm over 1800mm. Any more and the floor will telegraph unevenness, fail at joins, and show movement.
- Engineered wood: maximum deviation 3mm over 1800mm, plus moisture content below 12% in timber subfloors and below 75% relative humidity in concrete.
- Porcelain tile: subfloor must be structurally rigid with zero flex. Any movement in the subfloor will crack tiles and grout joints over time.
- All floor types over concrete: a damp-proof membrane (DPM) or moisture barrier is required unless the concrete is confirmed as DPC-protected and dry. This applies to the majority of ground-floor concrete substrates in London properties.
RCB Site Survey Checklist
Every RCB flooring project includes a subfloor assessment before the specification is confirmed. We check flatness, moisture readings, structural integrity, and any existing floor coverings that may affect the build height. Flooring costs quoted without a subfloor assessment should always be treated as indicative only.
Underfloor Heating Compatibility
Not all flooring is compatible with underfloor heating, and not all UFH-rated flooring is compatible with all UFH system types. The three key rules:
Check the manufacturer rating
The floor must be explicitly rated for use over UFH by the manufacturer, for the specific UFH system type (wet/screed or electric mat). Generic "UFH compatible" claims without specifying the system type are insufficient.
Maximum surface temperature 27°C
This is a near-universal limit. Exceeding it risks delamination of engineered wood, dimensional movement in LVT, and voiding warranties across all floor types. Your UFH system should be set to achieve a maximum surface temperature, not a maximum water temperature.
Acclimatisation and commissioning
The floor must acclimatise in the room for 48-72 hours before installation. After installation, the UFH must be brought up gradually — starting at 18°C for the first week and increasing by no more than 5°C per day until operating temperature is reached. Switching a cold UFH system to full power immediately after flooring installation is a common cause of failure.
Cost Guide: Supply Only
Budget LVT
£15 – £25 /m²0.2-0.3mm wear layer. 5-7 year expectation. Suitable for rental refurbishments with short replacement cycles.
Mid-Range LVT / Laminate
£25 – £45 /m²0.55mm wear layer LVT or quality laminate. 12-15 year expectation. Best value for most residential projects. Brands: Karndean, Amtico, Quick-Step.
Engineered Wood
£35 – £80 /m²Real wood veneer, 3mm+ wear layer. 20-25 year lifespan. Most commonly specified for living spaces and bedrooms in owner-occupied homes.
Premium / Natural Stone
£60 – £150+ /m²Large-format porcelain, marble, limestone. 30+ year lifespan. Higher installation cost due to substrate preparation and weight.
Installation (labour, adhesive, underlay, preparation) typically adds £15–£40/m² depending on subfloor condition and product type. Subfloor levelling compound adds further cost where required.
