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Home interiors · Stage 11 of 15: Site-built units

On-site carpentry checks in Kerala

By the Kolo home interiors team · Updated

The on-site twin of the factory: framework and core panels of site-built units, visible only until the laminate goes on. Same evidence, same discipline, your own floor.

The checks at this stage (2)

  1. Photograph before this is covered

    What disappears at this stage: the framework and core panels of site-built units, once laminate or veneer covers them. It cannot be inspected again without breaking something, so the photos taken now are the only record that will ever exist. Skipping this stays on your handover record permanently.

  2. Edges banded on every cut face, including the hidden ones

    An unbanded edge drinks moisture. It is on the back and underside — the faces nobody photographs — that units start swelling, and by then the unit is built in.

What good work looks like

Site-built units: the same core discipline

Site carpentry answers the same question the factory does - what is inside - with easier evidence: sheet stamps visible at delivery, the framework and core photographed per unit before laminate, and challans set against the BOQ lines. On your own floor, there is no excuse for missing photos.

Good signs
  • Sheet stamps photographed at delivery against spec
  • Each unit's frame and core shot before laminate
  • Challans reconciled against the BOQ lines
Warning signs
  • Sheets arriving stampless and unquestioned
  • Lamination racing ahead of the photo pass
  • Offcuts of a cheaper sheet appearing in the stack

Fixing into the wall, before the load

Wall-fixed units hang on their anchors for decades. Before loading: the fixing type suits the wall - solid masonry versus hollow block need different anchors - the count per unit matches the drawing, and the fixings are photographed before shelves, clothes and crockery arrive.

Good signs
  • Anchors suited to the actual wall material
  • Fixing count per unit as the drawing states
  • Fixings photographed before the unit is loaded
Warning signs
  • Hollow-wall anchors in a unit meant for masonry
  • Two screws doing a bracket row's job
  • Loading the unit the same hour it is hung

Fit and finish at the bench

Site-built quality shows at the details: edges banded or lipped cleanly with no glue lines, internal surfaces finished rather than raw, shutters hung with even reveals, hardware from the specified series fixed into solid material. The bench work is checkable daily - so it gets checked daily.

Good signs
  • Clean edge treatment with no glue squeeze-out
  • Internals finished, not left raw behind doors
  • Reveals even and hardware per the specified series
Warning signs
  • Raw board faces inside cabinets
  • Hardware swapped down a series at the bench
  • Sanding and finishing promised for the very end

Each board is worked differently — the site practices that follow the material

The core chosen at the spec freeze dictates how it is handled on site, and the handling is checkable while the work happens. HDHMR is dense enough to split around a driven screw, so hardware positions are pre-drilled. WPC cuts cleanly only with a carbide blade — a ragged edge means the wrong blade — and its hardware loads ride on the manufacturer's fixings, not on ordinary wood screws. Marine ply takes fasteners directly but pays for it at the edges, which is what the edge subject above exists for. MDF, where the design allows it at all, is panelling — never load-bearing, never wet. Aluminium systems assemble on modular clips, not improvised screws.

Good signs
  • Pilot holes at hinge and channel positions on HDHMR before the hardware goes in
  • WPC cut edges clean and square, hardware on the maker's specified fixings or inserts
  • Adhesive matched to the joint's duty — wet-area assembly on a water-resistant adhesive, not one pail for everything
  • SS304 screws and fittings in every wet zone
  • Factory-finished shutters arriving finished — a shutter being trimmed on site is a dimension error being hidden
Warning signs
  • Split HDHMR around driven screws, filled and laminated over
  • Hinges pulling out of WPC months later because the fitter used the screws he always uses
  • Mild-steel fittings under a sink, announced by rust streaks within the year

Cabinet-material technical comparison — installation guidance, per manufacturer datasheets

Red flags and money traps

Anchors carry decades - check them empty

A wall unit hangs on its fixings for the life of the house, and the fixings are visible for exactly one day: between hanging and loading. Type suited to the wall, count per the drawing, photographed - then the crockery.

Before loading: Fixings photographed per unit - type, count, bite - while the unit is still empty.

The cheaper sheet in the stack

Offcuts and lower-grade sheets migrating into a site stack is the on-site version of core substitution - and easier, because nobody audits a working pile. Stamps checked at every delivery keep the stack honest.

Every delivery: Stamps photographed against the spec - not just the first lorry, every lorry.

Edges banded on every cut face, including the hidden ones

Every cut face gets edge banding, not only the ones on show. Check the undersides of shelves, the backs of shutters and the inside of carcass cut-outs for pipes. Run a finger along the edges; a raw edge is unmistakable.

Trade practice, not a code: Manufacturer fabrication specification; established trade practice — not fixed by an IS clause

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