What are the different installation methods for engineered wood (floating / glue-down / nail-down)?

Engineered wood can be installed three different ways, and the choice affects cost, performance, and which subfloors work. Here is the complete comparison from Material Depot's installation team.

1. FLOATING INSTALLATION (CLICK-LOCK):

How it works: Planks click-lock together along their edges, forming a continuous interlocked surface. The floor is NOT physically attached to the subfloor - it "floats" on top, held in place by its own weight and friction at the walls.

Pros:
- Fastest install: 600-800 sqft/day with a 2-person team.
- Cleanest install: no glue, no adhesive fumes, no nails.
- Works over multiple substrates: concrete (with DPM), plywood, existing tile/marble.
- DIY-friendly for skilled enthusiasts on smaller areas.
- Easiest to lift and reinstall later (e.g., for subfloor access).
- Lowest install cost: Rs 40-60/sqft.

Cons:
- Slightly hollow underfoot feel vs glue-down (you can hear footsteps).
- Subfloor must be very flat (within 3mm/m).
- Click joints can develop micro-gaps over years if not perfectly installed.

Best for: Standard premium residential, fast-track projects, occupied homes during renovation, DIY-curious clients.

2. GLUE-DOWN INSTALLATION:

How it works: Engineered wood planks glued directly to the subfloor with polyurethane (PU) adhesive. The wood becomes one with the subfloor.

Pros:
- Most stable installation - no movement, no hollow sound.
- Premium feel underfoot - solid, substantial.
- Best for thermal transfer with underfloor heating.
- Essential for herringbone, chevron, parquet patterns (click systems don't work for small parquet pieces).
- Best long-term joint integrity.
- Suitable for commercial and heavy-traffic installations.

Cons:
- Slower install: 250-400 sqft/day.
- More expensive: Rs 60-100/sqft installation.
- Higher labour skill required.
- Adhesive fumes during install (low-VOC PU adhesives reduce this).
- Permanent - lifting glued-down wood is very destructive.

Best for: Herringbone/chevron, UFH installations, commercial projects, premium residential where maximum stability matters, multi-room continuous installations.

3. NAIL-DOWN INSTALLATION:

How it works: Engineered wood nailed (cleats or staples through tongue) to a plywood subfloor below. Traditional wood floor installation method.

Pros:
- Very stable, traditional method.
- Best for plywood subfloor structures.
- Used in heritage projects and traditional aesthetics.

Cons:
- Only works on plywood subfloor (NOT concrete).
- Less common in modern Indian apartment construction (which typically uses concrete).
- Requires skilled finisher and proper subfloor preparation.
- Cost: Rs 70-120/sqft installation.

Best for: Heritage projects, plywood-substrate properties (sometimes older Indian colonial homes), traditional craftsmanship contexts.

CHOICE FRAMEWORK:

1. CONCRETE SUBFLOOR + STANDARD PLANK → FLOATING (CLICK-LOCK).
Most modern Indian apartments. Fast, clean, value.

2. CONCRETE SUBFLOOR + HERRINGBONE/CHEVRON PATTERN → GLUE-DOWN.
Pattern requires precise bonded install.

3. CONCRETE SUBFLOOR + UNDERFLOOR HEATING → GLUE-DOWN (PREFERRED).
Better thermal transfer, more stable under temperature cycling.

4. PLYWOOD SUBFLOOR + TRADITIONAL AESTHETIC → NAIL-DOWN.
Rare in modern Indian construction; specific heritage applications.

5. PREMIUM RESIDENTIAL + MAXIMUM STABILITY → GLUE-DOWN.
For clients who want the most substantial feel underfoot.

6. BUDGET/FAST-TRACK PROJECT → FLOATING.
Best value, fastest completion.

7. COMMERCIAL/HEAVY TRAFFIC → GLUE-DOWN.
Required for many commercial installations.

SUBFLOOR REQUIREMENTS FOR EACH METHOD:

FLOATING:
- Flatness: 3mm variation per 1 metre.
- Moisture: <4% RH (concrete).
- DPM: required on concrete.
- Underlay: separate underlay or attached IXPE.

GLUE-DOWN:
- Flatness: 3mm per 1 metre.
- Moisture: <2% RH (concrete) - tighter than floating because adhesive needs dry substrate.
- DPM: built into the adhesive system or separate moisture barrier.
- Subfloor must be clean, dry, primed.

NAIL-DOWN:
- Plywood subfloor must be 12mm+ thick.
- Plywood securely fastened to joists.
- Moisture-controlled environment.

MATERIAL DEPOT COORDINATES ALL THREE METHODS through our empanelled installer network. We recommend based on your subfloor, plank pattern, project priorities, and budget. The design team can spec the right method during your studio visit.