The hall at Bashundhara fills up before lunch. A contractor from Mirpur stops at a row of tiles and runs his palm across the surface. Two stalls down, a site engineer studies a small excavator, asking the man beside it how it handles the tight lanes of old Dhaka. This is the second day of the six expos at the International Convention City Bashundhara, and the crowd is doing what it comes here to do: look, touch, compare, and take notes for the next project.

Six shows share the venue from 12 to 14 November, open from 10 in the morning to 7 in the evening. The list runs from the 31st Build Bangladesh and the 25th Real Estate Expo to the 28th Power Bangladesh, the 23rd Solar Bangladesh, the 8th Dhaka Lighting and the 8th Water Bangladesh. One ticket covers the lot, and the organiser says more than 200 companies from over 20 countries have taken more than 500 booths, with over 20,000 visitors expected across the three days. The International Finance Corporation is the strategic partner for the event.

What fills the floor

Estate News — Find your dream home

Build Bangladesh is the anchor for anyone putting up a building. Tiles, sanitary ware, pipes, rods, cement products, doors, windows, lifts and finishing materials sit in long rows, and the people walking them are mostly the people who buy in bulk: developers, contractors, architects and hardware traders. The Real Estate Expo sits beside it, with developers showing their projects to visitors who have come to look at flats rather than materials.

Power Bangladesh and Solar Bangladesh draw a different crowd. Factory owners and housing society managers stop at inverters and panels, working out what a rooftop array or a backup system would cost a building. Dhaka Lighting shows fixtures for homes, offices and streets, while Water Bangladesh covers pumps, treatment and plumbing. The Sri Lanka Pavilion adds a foreign row to the floor, and the exhibitor list includes names buyers already know from the market, among them LESSO, Zoomlion, Huawei, Siemens and Walton.

Why builders come in person

A catalogue tells a buyer the price. It does not tell him how a tile feels underfoot, how a tap turns, or whether a machine fits through a site gate. That is the reason the hall matters, and the reason the same faces return each year. A contractor who has built in Uttara can stand beside a machine and ask the questions that only make sense on a real site: how much it weighs, who services it in Dhaka, what spares cost.

Estate News free property calculators

For a flat buyer, the value is quieter. The materials on these floors are the materials that will go into the next round of buildings. A buyer who walks the tile rows and the sanitary ware stalls learns what a standard fitting looks like, and what an upgrade costs. When a developer later shows a brochure, that buyer has something to compare it with.

What to look for on day two

Start with the things that fail first in a Dhaka flat: taps, pipes, switches and door fittings. Check how they are made, not only how they look. In the solar rows, ask about warranties and after-sales service in Bangladesh, since a panel is only as good as the company that answers the phone when it stops working. In the machinery rows, watch the small machines. Dhaka's building sites are often narrow, and a compact excavator or a small loader earns its keep where a large one cannot turn.

A day that suits first-time visitors

The second day is also the best day for a first-time visitor. The opening crowds have thinned, the stall staff have settled in, and a visitor can spend an hour in one hall without being rushed along. Bring a notebook, and bring the measurements of the room or the site the purchase is for. A tile that looks right in a catalogue can look wrong against the light of a real bathroom, and the expo floor is the one place where both can be checked side by side.

The expos run until Saturday 14 November, closing at 7 each evening at the International Convention City Bashundhara. The organiser says the gates stay open to trade visitors and the public alike, and the second day is usually the busiest for serious buyers, when the opening-day crowds thin and the conversations get longer. For anyone building, buying or fitting out a home in Dhaka, it is the one place this week where the whole supply chain stands in a single hall.