Site Supervision: What Should Happen Every Week

Most interior and renovation projects in India do not fail because of bad design or bad materials. They fail in the weeks in between — when the electrician has chased the walls but nobody checked the switch heights before plastering, when the bathroom was tiled before the waterproofing was tested, when the false ceiling was boarded over a grid that sagged by 8 mm in the middle of the room. Each of these is invisible a few days later, and expensive to put right once it is found. The client usually discovers it at handover; the contractor says it was always like that; the designer says it was not in the drawing.

Site supervision exists to stop this. Yet on many projects it is understood as a site visit whenever the client calls, or whenever the designer happens to be nearby. That is not supervision. Supervision is a weekly rhythm with fixed checks, fixed records and fixed moments — called hold points — at which work stops until it has been inspected. It is the cheapest insurance a project can buy, because almost every check it involves costs minutes, while every missed check costs days.

This article sets out what should happen every week on a typical home interior or renovation site of 10 to 16 weeks: the weekly cycle, who does what, the stage-by-stage checks and hold points, the tolerances worth measuring, the weekly report and the red flags. It expands the short note on this site about what Aaditya Interior's supervisors check on every visit into a complete working method that any homeowner can ask their designer or contractor to follow.

Where site supervision comes from

For most of history the person who designed a building also stood on its site. The master builders of temples, havelis and stepwells directed the masons day by day, and the mistri tradition in Indian building — a lead craftsman responsible for the work of a team — still carries that idea. When design and construction separated into different professions, someone had to stand between them. In British and Indian public works, that role became the clerk of works: an inspector on site who checked that the contractor built what the drawings and specifications described, recorded measurements and reported to the engineer or architect.

Indian public works still run on that model. Government projects follow detailed specifications — the CPWD specifications are the best-known example — and record quantities in measurement books, with tests and inspections at defined stages. Private residential projects rarely have a clerk of works, but the same three ideas apply at any scale: inspect before work is covered, measure what was done, and keep a written record. Today the record is a photograph on a phone with a date and a location, and the report is shared on a messaging group or a project app, but the discipline is the same.

The weekly cycle

A supervision week has a shape. It begins with a look-ahead — what will happen on site this week, what needs to be on site for it to happen, and which stages will reach a hold point. It continues with daily checks by whoever is on site full time, usually the contractor's supervisor or the designer's site engineer. In the middle of the week the designer or project lead makes the main inspection visit, timed to catch the work that is about to be covered. At the end of the week a short site meeting reviews progress, decisions and snags, and the week closes with a written report that the client receives. Fig. 1 shows the cycle.

Hold points: the moments when work must stop

A hold point is a stage at which work is not allowed to continue until a named person has inspected it and signed it off. Hold points are the heart of supervision because they target the work that will be hidden. A wall chase is checked before it is plastered; a bathroom is flood-tested before it is tiled; a ceiling grid is checked before it is boarded. Once the next layer goes on, the only way to inspect the first is to break the second. On a home interior, eight hold points cover most of the risk.

Two habits make hold points work. First, every hold point is photographed with a tape measure or a level visible in the frame, so the record shows not only that the work existed but what its dimensions were. Second, the photographs of electrical and plumbing hold points are kept permanently in the project file. Years later, when a nail must be driven into a wall or a pipe traced, those photographs are worth more than any drawing.

What happens each week: a 14-week fit-out

Interior projects follow a sequence that is broadly the same for flats and bungalows: civil changes and services first, then ceilings and floors, then joinery, then finishes, then installation and snagging. A complete interior for a 3BHK flat typically takes about 12 to 16 weeks once drawings are final, depending on scope, factory lead times and the number of trades working in parallel. Fig. 2 shows a 14-week programme with its hold points marked, and the table below it lists what the weekly inspection should focus on at each stage.

Measuring quality: tolerances worth checking

Supervision becomes objective when it measures. "The ceiling looks fine" is an opinion; "the ceiling is within 3 mm of level over the whole room" is a fact that both designer and contractor can accept. The tolerances below are practical targets commonly used for good residential interior work. They are not legal limits, and specific products — tiles, boards, ceiling systems — come with their own installation tolerances from their makers, which take precedence. What matters is that they are agreed at the start and measured during the work, not argued about at handover.

Wet areas: the most important hold point

No single inspection saves more money than the bathroom waterproofing check. Leaks from bathrooms into the flat below are among the most common and most disputed defects in Indian housing, and they are almost always caused by a membrane that was not continuous at a corner, a drain or a pipe penetration, or by tiling over a membrane that was never tested. The inspection is simple. The supervisor checks the membrane at every corner, around every pipe and at the floor drain; checks that it turns up the walls — typically about 300 mm, and higher in the shower zone; then blocks the drain and holds water on the floor for 24–48 hours while someone checks the ceiling of the flat or room below. Only a dry ceiling releases the bathroom for tiling. Fig. 4 shows the points to look at.

The weekly report: what it must contain

A weekly report does not need to be long. A one-page summary with photographs, sent every Saturday, is far more useful than a detailed document sent once a month. What matters is that it is consistent, that it compares progress with the plan rather than simply listing what happened, and that it puts decisions in front of the client before they become delays. The format below is the one most supervisors converge on after a few projects.

Two lines on the report deserve special emphasis. The first is "decisions needed". Most delays on Indian interior sites are not caused by slow work but by waiting — for a laminate to be chosen, a tile to be approved, a fan model to be confirmed. A report that lists each pending decision with a deadline and the cost of missing it turns waiting into a managed item. The second is "changes and extra items". Every change made on site — an extra socket, a moved partition, an upgraded hinge — has a cost. Recording it weekly, with approval, prevents the final-bill disputes that sour so many projects. It also links naturally to the payment schedule in the contract: each running payment should follow a measured, reported stage.

Red flags that supervision is not happening

A homeowner does not need to be an engineer to tell whether a project is being supervised. The signs are visible in the paperwork and on the site.

• No written report for two weeks or more — only phone updates.
• Walls plastered or bathrooms tiled before the client has seen any photograph of the conduits, pipes or ponding test.
• Nobody on site can show the latest drawing, or several versions are in use.
• Boards, tiles and paint on site are not the brands and grades in the quotation, and nobody has noticed.
• Snags raised last month are still open with no date for rectification.
• Extra items appear on the bill that were never recorded or approved during the work.
• The designer's visits are irregular and do not coincide with stages about to be covered.

What supervision costs, and how it is charged

In most residential interior projects, supervision is included in the designer's fee rather than charged separately — which is why it is worth reading the fee clause carefully. Fees are charged per square foot, as a lump sum or as a percentage of project cost; as this site's fee and contract guides note, a published market example is about ₹250 per sq ft for design plus supervision and percentage fees are commonly cited at around 8–12 per cent of project cost (illustrative, varying by firm and city). The contract should state how many visits are included, at which stages, and what happens when an extra visit is needed.

Where supervision is bought separately — for example when a family has drawings from one designer but appoints a contractor directly — it is usually charged per visit or per month. Indicative October 2026 ranges in tier-2 cities are roughly ₹1,500–5,000 per inspection visit for a home interior, depending on the city, the experience of the person visiting and the report expected, and a full-time site supervisor on a larger bungalow or villa is a monthly cost on top. Measured against the cost of breaking a single tiled bathroom to repair a leak, or reboarding one false ceiling, a season of weekly inspections is cheap.

Where site supervision is heading

The tools are changing faster than the method. Project apps now hold the drawings, the snag list and the photographs in one place, with each photo stamped with date and location. 360-degree cameras capture a whole room at each stage in a single shot, so an electrical hold point can be revisited years later as a walk-through. Laser measuring and scanning make dimension checks faster and more objective, and on larger buildings digital twins — discussed elsewhere on this blog — link the as-built record to the design model. None of these replaces the person on site with a level and the authority to say "stop until this is fixed". They simply make that person's work faster, easier to share and impossible to forget.

Rules for weekly site supervision

• Fix a weekly cycle — Monday look-ahead, mid-week inspection, end-of-week meeting and written report — and keep it every week.
• Agree the hold points in the contract, and never allow work to be covered until it has been inspected and signed off.
• Photograph every hold point with a tape or level visible, and keep electrical and plumbing photos permanently.
• Flood-test every bathroom and balcony for 24–48 hours before tiling, and check the ceiling below.
• Check the false ceiling grid with a laser before boarding, with all services and access panels in place.
• Check brand and grade stamps on boards, tiles and paint against the quotation as they arrive.
• Measure against agreed tolerances rather than arguing about appearance at handover.
• List every pending client decision with a deadline, and every change with its cost and approval, in the weekly report.
• Link each running payment to a measured, reported stage.

Frequently asked questions

How often should an interior designer visit the site?

At least once a week, and additionally at each hold point — before conduits are plastered, before bathrooms are tiled, before ceilings are boarded and before carcasses are finished. On fast-moving stages, two visits a week are better than one. The contract should state the number of visits included.

What does a site supervisor do every day?

Records attendance and deliveries, checks that work follows the latest drawing, photographs progress, checks materials against the specification, keeps the site safe and protected, and flags anything that needs the designer's decision before it is built.

What is a hold point in construction?

A stage at which work stops until a named person inspects and approves it, typically because the next layer of work will hide it. In home interiors, the critical hold points are electrical conduits, plumbing, waterproofing, the false ceiling grid, tile layout, joinery carcasses and wall surfaces before final paint.

How long should a waterproofing ponding test be?

Commonly 24–48 hours, with the drain blocked and water held across the whole floor, while the ceiling below is checked for damp. Follow the waterproofing product maker's recommendation, and photograph the water level at the start and end of the test.

Is site supervision included in interior design fees?

Usually, in full-service and turnkey projects, but the number and timing of visits vary widely. Design-only fees often exclude supervision or include only a few visits. Read the fee clause and ask for the visit schedule in writing.