Dryback vs Click vs Loose Lay LVT —
Which Installation System
Should You Specify?
Dryback (glue-down) is specified where rolling loads, wet areas or the heaviest commercial use apply. Click LVT / SPC is specified where a fast floating install is enough. Loose lay is specified where the subfloor must stay accessible. The use class is declared per product under ISO 10874 — it is not set by the installation method.
LVT floor coverings share the same surface — wear layer, décor film, UV coating — but connect to the subfloor in three completely different ways, and each is correct for a different project. Dryback bonds permanently with adhesive: zero joint movement under rolling load and a sealed floor in wet areas, which is why hospital, airport and supermarket specifications usually combine a heavy-commercial or light-industrial use class with a bonded installation. Click LVT / SPC is a floating floor with a mechanical joint — no adhesive, faster, reversible; rigid-core SPC is declared up to Class 43 depending on SKU. Loose lay holds by a friction-grip, fibreglass-reinforced backing — no adhesive, no click, lifts in seconds, declared up to Class 42/43 depending on SKU. Specify the wrong system and you get either a warranty claim or a failed specification — neither is fixable without replacing the floor.
ISO 10874 (the successor to EN 685) defines domestic classes 21–23, commercial 31–34 and light-industrial 41–43. There is no Class 44, and the 2020 amendment removed Class 22+. A class is declared for a product and its test file; gluing a floor down does not raise its class. What dryback changes is joint behaviour under rolling load and water migration at the edges — the two reasons it is specified for healthcare, airports and heavy retail. Read the use-class guide, then confirm the declared class on the SKU datasheet.
The Three Systems — at a Glance
Dryback LVT
Full-spread adhesive bonds the plank permanently to the prepared subfloor — zero movement under load and no open edge for water. Correct for rolling-load environments, wet areas and heavy-commercial or light-industrial projects (Class 34, 41–43 as declared per SKU). Needs subfloor prep and adhesive cure (typically 24–48 h before traffic).
Click LVT / SPC
Uniclic or Välinge joint — planks connect mechanically, no adhesive. Floating install is faster and reversible. Rigid-core SPC is declared up to Class 43; flexible-core click LVT Class 33/42. Correct for residential, BTR and commercial where no sustained rolling load applies.
Loose Lay LVT
A heavy friction-grip backing over single or dual fibreglass reinforcement holds the floor without adhesive or joint — planks lift in seconds and the subfloor stays accessible. Correct for occupied office renovation, raised-access floors and data centres. Not for wet areas or sustained rolling loads.
Full 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 |
| ISO 10874 use class (declared per SKU) | Class 33/42 (2.5 mm) · Class 34 / 43 (3 mm, 0.7 mm wear) — see datasheet | Up to Class 43 (SPC, 0.7 mm) · 33/42 (flexible LVT) | Up to Class 42/43 |
| Typical specification | Healthcare, airport, supermarket, wet areas | Residential, BTR, standard commercial | Office fit-out, raised-access, data centre |
| Adhesive required | Yes — cure 24–48 h | No | No |
| Handover time | 24–48 h cure | Immediate | Immediate |
| Reversible / liftable | No — permanent | Possible but destructive | Yes — lifts in seconds |
| Rolling-load resistance | Maximum — no joint movement | Good — rigid core | Limited — friction only |
| Wet-area suitability | Yes — adhesive-sealed | Yes — waterproof joints | No — edges can lift |
| Raised-access floor | Not suitable | Possible (hollow sound) | Ideal — panels stay accessible |
| Reinforcement | None — bond provides stability | Rigid / flexible core | Single or dual fibreglass |
| Thickness range | 2–3 mm | 4–8 mm (SPC) / 4–5 mm (LVT) | 4–5 mm |
| Certification | CE · Bfl-s1 · FloorScore · GREENGUARD Gold | CE · Bfl-s1 · FloorScore · GREENGUARD Gold | CE · Bfl-s1 · FloorScore · GREENGUARD Gold |
Use classes are declared per SKU on its datasheet and CE DoP. The ranges above are indicative; always confirm the exact class and wear layer for the SKU being quoted.
Dryback LVT — When a Permanent Bond Is the Specification
Dryback LVT is the most commercially proven system. The adhesive bond eliminates the joint movement that causes click and loose-lay floors to fail under sustained rolling load, which makes it the usual choice wherever pallet jacks, hospital trolleys or baggage trolleys operate. The three gauges serve distinct roles: 2 mm for volume residential; 2.5 mm for EU commercial (Class 33/42 — office renovation, housing-association corridors, UK retail); and 3 mm with a 0.7 mm wear layer, the gauge specified for healthcare, airports and supermarket sales floors, where the declared class (34 / 43 per SKU), a hard-set adhesive and chemical resistance are written into the brief together.
A hospital or airport brief normally asks for two things at once: the declared use class on the product datasheet (heavy commercial 34 or light industrial 41–43 under ISO 10874) and a permanently bonded installation so joints cannot move under trolleys. A floating click floor can carry the same declared class as a dryback plank, but it does not meet the bonded-installation requirement. If the brief calls for rolling-load resistance or a sealed floor, dryback glue-down is the system to specify.
Click LVT and SPC — When Floating Installation Is Correct
Click floors — rigid-core SPC and flexible-core click LVT — float on the subfloor without adhesive, which makes installation fast, programme-friendly and reversible. SPC has a rigid limestone-PVC core (1.95–2.05 g/cm³), dimensional stability ≤0.10% (EN ISO 23999), and is declared up to Class 43 with a 0.7 mm wear layer — the choice for commercial, UFH-equipped homes and acoustic-sensitive high-rise residential. Flexible-core click LVT is warmer and quieter underfoot, Class 33/42, for residential where walking comfort outranks maximum durability.
Click joints deflect under sustained trolley or pallet-jack traffic, producing joint noise and eventually separation. If the project sees daily wheeled loads, dryback is the correct system — regardless of the click product’s declared class.
Loose Lay LVT — The Office-Renovation and Raised-Access Specialist
Loose lay LVT fills a niche neither dryback nor click serves well. Its friction-grip backing — stabilised by a single or dual fibreglass reinforcement layer that stops the PVC stretching or curling with temperature — holds the floor with no adhesive and no cure time. That fibreglass layer is what makes friction-only installation viable: a plank lifts in seconds, so the subfloor stays accessible.
Two applications define it. Phased renovation in occupied buildings: a zone is finished at the end of a working day and in use the next morning. Raised-access floors — including data centres and server rooms: adhesive is usually not permitted on removable panels and click joints sound hollow over them, whereas loose lay leaves every panel liftable for cabling and cooling access (a dual-fibreglass build spans between pedestals without deflection, with an anti-static option for sensitive environments). The limits are firm: not for wet areas (water migrates under the edges), not for sustained rolling loads, and it needs a particularly flat subfloor — there is no adhesive layer to bridge minor irregularities.
Loose Lay vs Dryback — The Head-to-Head
These two systems are the most often compared, because they sit at opposite ends of the “permanence” scale. The decision is not about looks — the surface is identical — it is about subfloor access, rolling load and wet-area exposure.
| Loose Lay LVT | Dryback LVT | |
|---|---|---|
| Holds by | Friction backing + fibreglass | Full-spread adhesive bond |
| Subfloor access after install | Lifts in seconds, no tools | Solvent removal — disruptive |
| Declared use class (per SKU) | Up to Class 42/43 | Up to Class 34 / 43 (3 mm, 0.7 mm wear) |
| Rolling load / wet area | Not suitable | Suitable — bonded, sealed edges |
| Raised-access floor | Ideal | Not suitable |
| Cure time | Zero — immediate re-entry | 24–48 h |
| Phased renovation | Zone-by-zone | Whole area before re-entry |
| Best for | Office fit-out, raised-access, data centre, tenant space | Healthcare, airport, wet area, heavy commercial |
Dryback carries a lower ex-factory price, but installed cost must also include adhesive, 24–48 h of site downtime, and higher removal cost at end of life. For raised-access and phased-renovation projects, loose lay is often the lower total cost despite a higher product price — because it removes the adhesive, the downtime and the future removal cost entirely.
Yes — and for large commercial jobs it is frequently optimal: loose lay for raised-access office zones (subfloor access) + dryback for corridors, wet areas and lobbies (rolling load, sealed edges). Both share the same décor films (EIR wood, stone, terrazzo, carpet), so the floor looks consistent across zones while each area gets the correct system. Both ship from one factory with one CE DoP and certification pack.
Sourcing Economics — Thickness Decides Your Landed Cost
A factor most guides ignore but that moves a distributor’s margin directly: how much floor fits in a container. Thin, dense dryback loads far more square metres than thicker SPC or loose lay. These are our own factory loading figures for a standard 20 ft container:
At the same container freight cost, 2.5 mm dryback carries roughly twice the area of 5 mm SPC click or 5 mm loose lay. For a large Class 33/42 programme where floating installation isn’t required, that yield gap — plus dryback’s lower ex-factory price — can be the deciding specification factor before a single sample is cut.
Choosing by Project Type — Procurement Reference
- UK residential / BTR / PRS: floating preferred (no cure delay). SPC click 5–6 mm with 0.5 mm wear; flexible click LVT where acoustic comfort leads. See the SPC range.
- Healthcare — ward, corridor, treatment room: bonded installation with the declared heavy-commercial / light-industrial class on the SKU datasheet. 3 mm dryback, 0.7 mm wear, Bfl-s1, R10, hard-set adhesive.
- EU office renovation / social housing: Class 33/42. 2.5 mm dryback, 0.5 mm wear — better container yield than SPC click at lower ex-factory cost. Bfl-s1, FloorScore, AgBB for EU.
- Occupied office fit-out / raised-access / data centre / tenant space: loose lay 5 mm (dual fibreglass for raised-access). Same-day handover, removable at lease end.
- Airport / supermarket / heavy commercial: bonded installation. 3 mm dryback, 0.7 mm wear, hard-set adhesive, Bfl-s1, Grade 5 chemical resistance; confirm the declared class per SKU.
- Acoustic-sensitive high-rise residential: 8 mm SPC click for impact-sound performance (confirm ΔIIC value per the product datasheet against your local acoustic code).
Three Questions That Determine the Correct System
Yes → dryback — 3 mm + 0.7 mm wear + hard-set adhesive, with the declared class confirmed on the datasheet. Click and loose lay do not meet a bonded-installation requirement. No → question 2.
Yes → loose lay 5 mm — no adhesive, no cure, liftable. No → question 3.
Yes → SPC click (declared up to Class 43) or flexible click LVT (Class 33/42). Large volume / cost-sensitive → 2.5 mm dryback delivers Class 33/42 at lower ex-factory cost and roughly double the container yield of 5 mm SPC. See the use-class guide (EN 685 → ISO 10874).
- GREENGUARD Gold (UL 2818) — dryback 135462-420, click 135464-420, loose lay 135463-420. Certified through January 2027, TVOC below the GREENGUARD Gold ceiling of 0.22 mg/m³.
- FloorScore (CDPH/EHLB v1.2 · California 01350) · CE EN 14041 · Bfl-s1 (EN 13501-1) · CARB 2 · ISO 9001 — issued per shipment, CE DoP in the importer’s company name.
- Manufactured at Ecoflors’ Changzhou and Jiaxing facilities. MOQ 800 m² per SKU · HS 3918.10 · FOB Ningbo / Shanghai.
Frequently Asked Questions
What is the difference between dryback and click LVT?
Is there an EN 685 or ISO 10874 Class 44?
What is loose lay LVT flooring?
Which LVT system is correct for a hospital?
Can loose lay LVT be used in a bathroom or wet area?
Is dryback or click LVT better value for a large commercial project?
Sources
- ISO 10874:2009 + Amd 1:2020 — Resilient, textile and laminate floor coverings — Classification (replaces EN 685).
- EN 14041 — Resilient, textile and laminate floor coverings — Essential characteristics (CE marking).
- EN ISO 23999 — Resilient floor coverings — Determination of dimensional stability and curling after exposure to heat.
- EN 13501-1 — Fire classification of construction products (Bfl-s1).
- Ecoflors use-class guide and product documentation.
Request sample kits across all three systems, or tell us your application areas and we’ll recommend the correct system per zone — same décor, one CE DoP and certification pack, MOQ 800 m² per SKU.