Contractor's guide to buying tiles in bulk: shade, caliber and batch codes, wastage by pattern, IS 15477 adhesive planning, delivery checks and claims.
Quick answer
Order the whole project quantity plus 5% spares from a single batch, verify every box against the approved sample at delivery, and inspect each tile before it goes down — after laying, it is yours.
Last updated: 26 July 2026 · By Puranmal Sons & Ceramix Syndicate, wholesale building-material distributor, Indore · Prices are indicative for mid-2026.
Buying tiles for a project is like buying cloth for 500 uniforms. Every metre of cloth must come from the same dye lot, because two rolls dyed on different days never match exactly — and once the shirts are stitched, the mismatch is there for everyone to see. Tiles work the same way. Every box carries a shade code, a size (caliber) code and a batch number. Boxes from the same batch match; boxes from different batches usually do not, even if the design name and catalogue photo are identical.
So the rules are simple. First, work out the full quantity for the whole project — every floor, every flat — add extra for cutting waste and future repairs, and buy it all from one batch in one go. Second, when the truck arrives, count the boxes and read the codes on every box before you sign. Third, never lay a tile you have not looked at, because a tailor will replace a defective shirt but no one takes back a stitched one — and no tile company accepts a complaint after the tile is fixed in the floor.
Verdict: order the whole project quantity plus 5% spares from a single batch, verify every box against the approved sample at delivery, and inspect each tile before it goes down — after laying, it is yours.
| Project stage | What to check / do |
|---|---|
| Sampling | Approve a physical sample tile in daylight; record design, size, grade, shade and caliber codes; keep the sample on site till handover |
| Ordering | Measure all areas, add wastage by lay pattern (7–18%), round up to full boxes, add 3–5% spares — all from one batch, reserved in writing |
| Delivery | Count boxes against the challan; check shade, caliber and batch printed on every box against the approved sample; open 4–5 boxes for transit breakage before signing |
| Storage | Stack on edge (vertically) on a dry, level surface; keep separated by size, shade and floor allocation; do not stack flat above 5–6 boxes |
| Laying | Dry-lay and blend tiles from 4–5 boxes; check each tile for cracks, chips and shade in daylight before fixing; use the right IS 15477 adhesive type |
| Claims | Report shortage/breakage within 24–48 hours with box photos; shade or defect complaints only before laying — laid tiles are deemed accepted |
Every carton from an organised Indian tile plant carries four pieces of information beyond the design name and size.
Shade code. A letter/number designation (for example "Shade: L-21") signifying that this box is visually compatible with other boxes carrying the identical code. Manufacturers openly state that some shade variation is inherent to ceramic manufacturing — the shade code is how they sort it. Some catalogues also print a V1–V4 variation rating: V1 is near-uniform, V4 is deliberately random (rustic/stone-look designs).
Caliber (work size) code. Fired tiles shrink slightly and unpredictably in the kiln, so a nominal 600 × 600 mm tile may actually measure 597 or 598 mm. Plants measure each tile and sort them into caliber groups; the code on the box (for example "Cal: 3") means every tile inside falls within that narrow size band. Mix two calibers on one floor and the grout joints will visibly wander, since a 1–2 mm size difference compounds across a row. Rectified tiles — edges mechanically ground after firing, standard for glazed vitrified tiles (GVT) — hold much tighter size tolerance and allow 2–3 mm joints, but they still carry shade and batch codes, so rectification solves size, not colour.
Batch/lot number. The production-run identifier (often a date-linked code). Tiles fired together share raw material, glaze mix and kiln conditions. Two batches of the same design can differ in both tone and caliber; the difference is invisible within a batch and obvious across batches — the classic "banding" you see in lobbies where a top-up order met the original stock.
Grade. Premium/first-choice material carries the brand's standard marking; sorted-down material (standard/commercial/economy, and unbranded "seconds") is sold cheaper with permitted surface defects and looser tolerances. For client-facing areas, specify premium grade in the purchase order and check the grade line on the boxes — mixed-grade supply is a common source of site disputes.
Measure every room, balcony, skirting run and common area from the working drawings, not the sale brochure. Then apply a wastage factor by lay pattern — cutting waste is a function of geometry, not workmanship:
| Lay pattern | Extra to order |
|---|---|
| Straight/grid lay, large open rooms | 7–10% |
| Brick bond / one-third offset | 10–12% |
| Diagonal (45°) | 12–15% |
| Herringbone / basketweave | 15–18% |
| Large format (600 mm+) | add ~2% to the above |
Convert the total to boxes and round up: a 600 × 600 box (4 tiles) and a 600 × 1200 box (2 tiles) each cover about 15.5 sq ft; an 800 × 800 box (3 tiles) about 20.6 sq ft. On top of cutting wastage, order 3–5% of the net quantity as spares from the same batch — for future repairs, plumber's cuts and handover snags. A batch sold out six months later is gone forever; ₹15,000 of spare boxes is the cheapest insurance in the trade. Get the distributor to confirm batch reservation in writing on the order, and insist on sample and shade approval — a sealed, signed sample tile — before bulk dispatch.
Sand-cement bedding was designed for porous ceramic tiles. Vitrified tiles absorb almost no water (porosity ≤ 0.5–3%), so cement slurry cannot key into them — hollowness and debonding follow. IS 15477:2019 classifies polymer-modified adhesives by application:
| IS 15477:2019 type | Intended use |
|---|---|
| Type 1 | Ceramic/clay tiles (porosity > 3%) on cement substrates, interior dry areas |
| Type 2 | Vitrified, glass mosaic and large-format tiles (porosity ≤ 3%), interior and exterior — the default for GVT/double charge |
| Type 3 | Exterior walls and cladding — ceramic, basalt, natural stone |
| Type 4 | Board substrates — gypsum board, plywood, fibre cement |
| Type 5 | Metallic and special substrates, engineered stone |
A "T" suffix (for example Type 2T) means thixotropic/non-slip — needed on walls. Budget consumption at roughly 1.2 kg/m² per mm of bed thickness (a published figure for a Type 2T adhesive):
| Application | Trowel / bed | Approx. consumption | Coverage per 20 kg bag |
|---|---|---|---|
| Ceramic wall tile | 6 mm notch (~3 mm bed) | 3.5–4 kg/m² | 55–60 sq ft |
| 600 × 600 vitrified floor | 8–10 mm notch | 4.5–5.5 kg/m² | 40–48 sq ft |
| 600 × 1200 GVT + back-buttering | 10–12 mm notch | 6–7 kg/m² | 30–35 sq ft |
Large formats (600 × 1200 and up) additionally need back-buttering, a levelling-clip system (clips + wedges) to kill lippage, and 3 mm+ spacers. Plan grout at roughly 0.1–0.3 kg/m² depending on tile size and joint width — small money, but a stock-out stops handover. Order adhesive with the tiles so the type matches the tile and substrate, not whatever the local hardware shop stocks that week.
Before the truck is unloaded: count boxes against the challan; read the size, design, grade, shade, caliber and batch printed on boxes from every pallet/stack and match them to the approved sample record — photograph the box labels; open 4–5 random boxes for transit breakage. Note shortages and breakage on the challan copy before signing. Trade practice tolerates minor transit breakage (typically settled by replacement or credit if recorded at delivery); nothing recorded, nothing recovered — most suppliers entertain breakage claims only within 24–48 hours with photographs.
Storage: stack boxes on edge (tiles vertical) on a dry, level, covered surface — never flat-stacked head-high, which cracks the bottom boxes. Keep stacks segregated by size, shade/caliber code and floor allocation, and keep the spare boxes locked away separately so they are not consumed as regular stock.
Stated generally — confirm specifics on your quotation. Distributors quote either per box or per sq ft; always convert to a common basis (per sq ft of actual coverage) before comparing, and confirm whether the rate is basic or GST-inclusive. Ceramic and vitrified tiles (HSN 6907) attract 18% GST, unchanged through the September 2025 rate rationalisation; adhesives and grouts are also commonly at 18%. Freight and loading/unloading may be included locally or billed extra for outstation sites (Dewas, Ujjain, Pithampur, Dhar) — get it in writing, including who bears transit breakage. Credit in the trade is relationship-based: established contractors typically operate on 15–45 day cycles or running accounts; new accounts start against advance or payment-on-delivery. Volume pricing is real but negotiated — full-truck, single-SKU orders command the best basic rates.
This is the single most litigated point between contractors and brands, and the policy is uniform across the industry. Kajaria's own laying instructions state: "It is imperative to understand that Kajaria Tiles shall bear no liability once the tiles are fixed." Manufacturers will replace defective or shade-mismatched material before fixing; after fixing, the tile is deemed inspected and accepted by the installer. So the mason is your last quality gate: dry-lay, blend tiles from 4–5 boxes, and reject cracked, chipped, warped or off-shade pieces to the side for a replacement claim. One visibly defective tile laid in a lobby costs more to cut out and re-lay than a hundred rejected at inspection.
1. 30-flat residential project, Indore — floor-wise schedule with batch reservation. Ten floors, three 2BHK flats per floor, about 600 sq ft of 600 × 600 double charge per flat = 18,000 sq ft net. Straight lay in cut-up rooms: +8% wastage = 19,440 sq ft ÷ 15.5 sq ft/box = 1,254 boxes → order 1,260 boxes, single batch, reserved in writing. Dispatch plan: ~126 boxes per floor slab, called up floor-wise as flats reach tiling stage, with the distributor holding reserved stock in the godown so floors 8–10 (tiled months later) come from the same batch. Handover: 30 spare boxes (one per flat) retained for the maintenance period.
2. The 200-box top-up disaster. A commercial project ordered 800 boxes; scope grew, and 200 more boxes of the "same" tile were bought three months later. New batch, new shade code — the difference was invisible in the shop and unmistakable across the lobby floor as a colour band at the junction. Rectification: cutting out and re-laying roughly 1,500 sq ft — about 100 boxes of fresh material (₹70,000+), removal and re-laying labour at ₹35–45/sq ft (₹55,000–65,000), plus adhesive again — a ₹1.5 lakh-plus loss against a top-up that "saved" nothing. The fix costs nothing: order full quantity plus spares upfront, or get the balance batch reserved.
3. Adhesive planning for 10,000 sq ft of 600 × 1200 GVT. 10,000 sq ft ≈ 929 m². Type 2 adhesive, 10–12 mm notch plus back-buttering ≈ 6 kg/m² → about 5,570 kg → 279 bags of 20 kg; order 290 bags (one bag per ~34 sq ft is a good site rule). Add roughly 1,290 tiles' worth of levelling clips (about 4,500–5,000 clips with reusable wedges), 3 mm spacers, and 120–150 kg of grout. Ordering adhesive ad hoc from the nearest hardware store mid-job is how sites end up mixing brands and types under one floor.
Indicative, mid-2026, may vary by brand, quantity and site. Per sq ft, landed and laid:
| Cost head | Standard spec: 600 × 600 double charge | Premium spec: 600 × 1200 GVT |
|---|---|---|
| Tile — basic project rate | ₹35–45 | ₹55–80 |
| GST @ 18% | ₹6–8 | ₹10–14 |
| Freight + loading (local) | ₹1–2 | ₹2–3 |
| Adhesive (Type 2, IS 15477) | ₹5–7 | ₹10–14 |
| Grout + spacers/clips | ₹1.5–2.5 | ₹4–6 |
| Laying labour | ₹25–40 | ₹60–100 |
| Total landed + laid | ₹75–105 | ₹140–215 |
Where bulk buying actually saves: (1) basic rate — full-truck, single-batch orders are quoted 5–12% under counter rates; (2) freight — one 10,000 sq ft delivery costs far less per box than ten split deliveries; (3) adhesive and grout bought with the tiles at project rates; and (4) the invisible saving — no top-up batch mismatch, which is the costliest line item on this page. Bulk buying does not save if it means accepting mixed batches or downgraded material to hit a price.
Topping up from a new batch. The extra 200 boxes will not match, and the band shows exactly where the old stock ended. Order the full quantity plus 3–5% spares upfront, or get the balance reserved from the same batch in writing.
Not reserving stock for later floors. Floors tiled in month six get whatever batch is then in production. Reserve the whole project quantity at order and call it up floor-wise from the distributor's godown.
Laying visibly defective or off-shade tiles. Every brand's policy says liability ends once the tile is fixed. Train masons to blend from 4–5 boxes and set aside any cracked, chipped or odd-shade piece — rejects are replaceable, laid tiles are not.
Fixing large-format vitrified with sand-cement. Near-zero porosity means the slurry never bonds; hollow-sounding tiles and debonding follow within months. Use a Type 2 adhesive per IS 15477 with a notched trowel, and back-butter anything 600 × 1200 or larger.
No daylight shade check before laying. Shade differences invisible under a warehouse bulb are obvious in morning light on a 2,000 sq ft floor. Dry-lay a few square metres in natural light against the approved sample before full production starts.
Signing the challan without reading the boxes. Wrong caliber or mixed shades discovered mid-laying are your problem, not the transporter's. Check shade, caliber and batch on every stack, and note shortages/breakage on the challan before the truck leaves.
Caliber is the actual fired work size of the tile, coded on the box (Cal 2, Cal 3, etc.). Tiles shrink slightly in the kiln, so plants sort them into size groups; all boxes on one floor must carry the same caliber code or grout joints will visibly vary. Rectified tiles are edge-ground to tighter tolerance but still carry shade and batch codes.
Add 7–10% for straight lay, 12–15% for diagonal and 15–18% for herringbone, then round up to full boxes and keep 3–5% more as same-batch spares for repairs. Under-ordering forces a top-up from a new batch, which rarely matches.
Practically, no. Industry-standard policy — stated in brands' own laying instructions — is that liability ends once tiles are fixed, because laying is treated as acceptance. Shade complaints must be raised on unlaid boxes, checked in daylight against the approved sample.
A Type 2 adhesive under IS 15477:2019 (for tiles with porosity ≤ 3%, including large formats) — Type 2T on walls. Budget about 6 kg/m² with a 10–12 mm notched trowel plus back-buttering, i.e., one 20 kg bag per 30–35 sq ft, with levelling clips to control lippage.
Neither is inherently cheaper — they are the same rate expressed differently. Convert every quote to rupees per sq ft of actual box coverage (a 600 × 600 box covers ~15.5 sq ft) and confirm whether GST at 18% and freight are included before comparing.
On edge (vertically), on a dry, level, covered surface, segregated by size, shade/caliber and floor allocation. Flat stacks more than 5–6 boxes high crack the bottom layers, and mixed stacks are how different calibers end up on one floor.
Puranmal Sons & Ceramix Syndicate is a third-generation wholesale tile and sanitaryware distributor and authorized Kajaria Tiles dealer on Jawahar Marg, supplying contractors and builders across Indore, Dewas, Ujjain, Pithampur, Dhar and Mhow for over 40 years. We quote project rates on full quantities, reserve your batch in writing, and schedule floor-wise dispatches with matching adhesive and grout — so your tenth floor matches your first. Call 95845-04888 or visit us at 254, Jawahar Marg, Rajmohalla, Indore.
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