Dryback vs Click vs Loose Lay LVT — Which Installation System Should You Specify?
LVT floor coverings are available in three installation systems — each correct for a different project type. Dryback (glue-down) uses permanent adhesive, achieves EN 685 Class 44, and is the only system correct for NHS hospitals, airports, and heavy commercial environments. Click LVT is a floating floor with a mechanical joint — no adhesive, faster installation, maximum Class 43, correct for residential and commercial environments where Class 44 is not required. Loose lay LVT uses a friction-backed underside — no adhesive, no click system, liftable and relayable, correct for occupied office renovation and raised-access floors. The wrong system for the project creates either a warranty claim or a specification failure — neither can be resolved without replacing the floor.
Full-spread adhesive bonds the LVT permanently to the prepared subfloor. Zero movement under load — correct for rolling load environments, wet areas, and any project requiring EN 685 Class 44. Requires subfloor preparation and adhesive cure time (typically 24–48 hours before traffic). The only system that achieves Class 44.
Max: Class 44 · NHS · AirportUniclic or Välinge 5G click-lock joint — planks connect mechanically, no adhesive. Floating installation is faster and reversible. Rigid-core SPC click achieves Class 43 maximum. Flexible-core click LVT achieves Class 33/42. Correct for residential, BTR, and commercial environments where Class 43 or below is sufficient and adhesive bonding is not required or practical.
Max: Class 43 (SPC) · Class 33/42 (LVT)Heavy friction-backed underside holds the floor without adhesive or mechanical joint. Liftable and relayable — same-day handover after installation. Correct for phased office renovation in occupied buildings, raised-access floors requiring cable access, and temporary tenant spaces. Not suitable for wet areas, high-traffic environments, or fixed permanent installations.
Max: Class 33 · Office · Raised-accessFull Comparison — Three Systems Side by Side
| Parameter | Dryback LVT | Click LVT / SPC | Loose Lay LVT |
|---|---|---|---|
| Installation method | Full-spread adhesive | Mechanical click joint | Friction backing |
| EN 685 max class | Class 44 (0.7mm wear) | Class 43 (SPC · 0.7mm) | Class 33 |
| Adhesive required | Yes — cure 24–48h | No | No |
| Subfloor prep required | Full preparation | Moderate | Minimal |
| Handover time | 24–48h cure | Immediate | Immediate |
| Reversible / liftable | No — permanent | Possible but destructive | Yes — easily liftable |
| Rolling load resistance | Maximum — no joint movement | Good — rigid core | Limited — friction only |
| Wet area suitability | Yes — fully waterproof bond | Yes — waterproof joints | No — edges can lift |
| Raised-access floor | Not suitable | Possible | Ideal |
| NHS HTM 61 compliant | Yes — Class 44 | No — Class 44 req. | No — Class 44 req. |
| Thickness range | 2–3mm | 4–8mm (SPC) / 4–5mm (LVT) | 4–6mm |
| FOB price from | US$3.80/m² | US$6.35/m² (SPC) | US$7.20/m² |
| Container yield | 4,200–6,200 m²/20ft | 2,200–2,600 m²/20ft | 2,800 m²/20ft |
Dryback LVT — When Permanent Bond Is the Specification
Dryback LVT is the oldest and most commercially proven LVT installation system. The adhesive bond eliminates all joint movement — which is the failure mechanism in click and loose lay installations under sustained rolling load. Consequently, Dryback is the mandatory specification for any environment where pallet jacks, hospital trolleys, or airport baggage trolleys are in use.
The three Dryback thicknesses serve distinct roles. 2mm Dryback (from US$3.80/m²) is the volume residential and LATAM specification — maximum container yield of 6,200 m²/20ft at the lowest FOB cost, EN 685 Class 21/31. 2.5mm Dryback (from US$5.10/m²) is the EU commercial balance — Class 33/42 at 5,100 m²/20ft, correct for office renovation, housing association corridors, and UK commercial retail. 3mm Dryback with 0.7mm wear layer (from US$5.90/m²) is the only LVT specification that achieves Class 44 — NHS hospital, EU airport, and supermarket chain sales floor.
EN 685 Class 44 requires both a 0.7mm wear layer and permanent adhesive bond. A floating click floor with 0.7mm wear achieves Class 43 — not Class 44. If your project specification states Class 44 (NHS HTM 61, ACI airport, or equivalent), Dryback glue-down is the only compliant system. There is no exception in the EN 685 standard.
Click LVT and SPC Click — When Floating Installation Is Correct
Click-format floor coverings — both rigid-core SPC and flexible-core click LVT — are floating floors. The planks connect via a mechanical joint and rest on the subfloor without adhesive. This makes installation faster, programme-friendly, and reversible — advantages that make click the dominant residential and commercial specification in the UK, EU, US, and Australian markets.
The distinction between SPC click and click LVT matters for specification. SPC (Stone Plastic Composite) has a rigid limestone-PVC core (1.95–2.05 g/cm³), dimensional stability ≤0.10% (EN ISO 23999), and achieves up to EN 685 Class 43 with 0.7mm wear layer. It is the correct specification for commercial environments, UFH-equipped UK homes, and Australian high-rise residential (where △IIC acoustic performance is required for NCC/BCA F5 compliance). Flexible-core click LVT has a softer PVC core — warmer and quieter underfoot, maximum Class 33/42, correct for UK PRS and HMO residential where acoustic comfort and walking sensation are priorities over maximum commercial durability.
Click LVT joints deflect under sustained rolling load — trolley traffic, pallet jacks, heavy furniture movement — producing audible joint noise and eventually joint separation. Furthermore, in high foot-traffic commercial environments without rolling loads, click joints accumulate micro-movement over time that produces the same result. Specifically, if your project will see daily trolley traffic, sustained heavy furniture loads, or foot traffic above Class 33/42, Dryback glue-down is the correct system — regardless of the click product’s stated EN 685 class.
Loose Lay LVT — The Office Renovation and Raised-Access Specialist
Loose lay LVT occupies a specific niche that neither Dryback nor click serves well: phased office renovation in occupied buildings. The friction-backed underside holds the floor without adhesive — installation is complete as soon as the last plank is laid, with no cure time. A zone can be finished at the end of a working day and in full use the following morning.
Raised-access floors — the standard in commercial office fit-outs — are the second core application. Adhesive bonding to a raised-access panel is usually not permitted (adhesive residue damages the panel surface and prevents future removal). Click joints over raised-access panels produce hollow underfoot sound. Loose lay solves both problems simultaneously: no adhesive, no hollow sound, and the panels remain accessible by simply lifting the LVT.
However, loose lay LVT has hard limits. It is not suitable for wet areas — water can migrate under the edges of friction-backed planks and cause adhesion failure. It is not suitable for environments above Class 33 — the friction backing provides insufficient resistance to sustained rolling loads. Moreover, loose lay LVT requires a particularly flat subfloor: any unevenness is transmitted directly through the plank without the adhesive layer that bridges minor subfloor irregularities in Dryback installations.
Choosing by Project Type — Procurement Reference
Floating installation preferred — no adhesive cure delay during phased handover. SPC click 5–6mm with 0.5mm wear for units and common areas. Flexible-core click LVT for acoustic comfort in PRS/HMO where tenant experience is the priority. Dryback 2mm only if glue-down is specifically required by building warrant.
→ SPC Click 5–6mm or Click LVTNHS HTM 61 Class 44 mandatory. Permanent adhesive bond required — no click system achieves Class 44. 3mm Dryback with 0.7mm wear layer, Bfl-s1, R10, Grade 5 chemical resistance. Hard-set adhesive (Mapei Ultrabond or equivalent) specified by M&E contractor. Same colour available in 2.5mm for staff offices maintaining universal colour matching across zones.
→ 3mm Dryback · 0.7mm wear · Class 44Class 33/42 sufficient. 2.5mm Dryback with 0.5mm wear is the cost-optimal specification — better container yield than SPC click (5,100 m²/20ft vs 2,200 m²/20ft) at lower FOB. Bfl-s1, FloorScore, AgBB for EU projects. UKCA and CE DoP for UK housing association procurement. Same colour in 2mm for residential units under the same purchase order.
→ 2.5mm Dryback · 0.5mm wear · Class 33/42Phased renovation in occupied buildings — same-day handover essential. Raised-access floors — cable access required. Tenant spaces — floor must be removable at lease end. Loose lay 5mm is the default specification for all three scenarios. Not suitable if rolling load traffic above Class 33 or wet areas are present.
→ 5mm Loose Lay LVTNCC/BCA Part F5 acoustic compliance. 8mm SPC click achieves △IIC 23–24 dB — reduces ceiling assembly specification burden across a full tower floor plate. FloorScore for GBCA Green Star. ABF Form B655 for customs clearance at Port Botany and Melbourne. Floating installation — no adhesive required in apartment residential.
→ 8mm SPC Click · △IIC 23–24 dBClass 44 for airport terminal and supermarket chain environments with pallet jack traffic. 3mm Dryback with 0.7mm wear and hard-set adhesive. ACI airport compliance or supermarket chain facilities standard documentation provided. Same colour in 2.5mm Dryback for back-of-house areas maintaining universal colour matching. Bfl-s1, Grade 5 chemical, peel resistance ≥50N/50mm.
→ 3mm Dryback · 0.7mm wear · Class 44The Container Yield Advantage of Dryback LVT
For importers and distributors, the choice between Dryback and SPC click has a direct impact on logistics cost that is frequently overlooked in product specification discussions. Dryback LVT is significantly thinner and lighter than SPC click — which means significantly more square metres fit into a 20ft container.
A 20ft container of 2mm Dryback LVT carries approximately 6,200 m² — versus approximately 2,200 m² for 5mm SPC click. At the same container freight cost, Dryback delivers nearly three times the coverage. Consequently, for large-volume residential and commercial renovation projects where Class 33/42 is the specification and floating installation is not required, Dryback LVT delivers a significantly lower landed cost per square metre than SPC click — before even comparing FOB prices.
Specifically, for a UK housing association specifying 50,000 m² of Class 33/42 flooring for a corridor renovation programme, the difference between 2.5mm Dryback and 5mm SPC click represents not just the FOB price differential (US$5.10 vs US$6.35) but also approximately 20 fewer containers — a logistics cost saving that alone justifies the specification decision.
(NHS hospital, EU airport, supermarket with pallet jacks)
No → Continue to question ②
(occupied office renovation, tenant fit-out, temporary space)
No → Continue to question ③
Large volume / cost-sensitive → Dryback 2.5mm delivers Class 33/42 at lower FOB and 2.3× better container yield than SPC click.
Frequently Asked Questions
Sample kits available for Dryback LVT (2mm / 2.5mm / 3mm), SPC Click (5–8mm), and Loose Lay LVT (4mm / 5mm / 6mm) — full-thickness planks with TDS and CE documentation. Dispatched within 5 business days.