Why do paint preparation bids run low in Qardho?

Paint preparation underbidding risks in Qardho start at the tender stage, not on site. A bid that prices paint, brushes and a few labour days looks cheaper than one that prices filling, sanding, dust removal, damp curing and the waiting time between coats. The difference is hidden inside a single lump sum line, so clients compare totals that do not describe the same work.

What gets left out of a cheap paint preparation line?

The cheapest preparation line usually covers only the visible steps: dusting down and one coat of paint. The work that decides whether the film stays on the wall sits outside it. On cement plaster, that means filling hollows and blowholes, rubbing down ridges, removing laitance and dust, and letting the plaster cure before coating. A method statement that never mentions filling or sanding, and a bill of quantities that carries one rate for "painting", both point the same way.

Preparation also consumes time rather than material. Damp curing of new plaster and the drying interval before the first coat are programme items. If a bidder has priced no time for them, the crew will either skip them or start coating a wall that is still green. Ask each bidder to list the preparation activities they have priced, with the sequence, and compare that list against the specification. Where the list is thin, the omission is likely to be preparation rather than paint.

How does thin preparation show up on the finished wall?

Failures appear as blistering, powdering, peeling sheets and patchy colour within months of handover. The mechanism is simple: paint bonds to a sound, dry, dust-free surface, and a dusty or damp substrate breaks that bond. In a hot, dry inland climate, direct sun and wind can flash-dry a coat before it knits, and a wall wetted for curing may be coated while still damp. Both leave a weak film that lifts at the edges.

Check the local situation on site rather than assuming it. Ask the municipal engineer's office whether it holds records or inspection notes for the building type. Walk a recently painted wall in the same compound or a nearby plot that has been through at least one rainy season. Look at the base of walls, shaded corners and any patch where plaster was repaired. Lift a loose flake with a knife and look at the back of it: dust on the back means the surface was not cleaned, and a soft, chalky back points to coating over uncured plaster. Photograph what you find and date it.

How do you close the gap before award?

Close it by making preparation a priced, inspectable activity, not a note in a specification. Ask for a bill of quantities with separate lines for surface preparation, filling, sanding, dust removal and each coat, and for the method statement that describes curing and drying intervals. Confirm the intervals against the project's specification or the engineer's instruction; general practice for cement-based plaster is to cure it damp and let it dry before coating, but the numbers belong to the specification.

Then set the inspection points into the contract and the payment schedule, and agree who signs off each stage before the next begins. Check what your contract allows regarding retention or staged certification. Never instruct a contractor to stop work or withhold payment on the basis of a suspected omission without first checking the contract terms and taking advice. A short pre-award meeting, with the activity schedule on the table, usually exposes the difference between a lean bid and a bid that has simply left the work out.

What to do next

Take the lowest paint bid and mark every preparation activity the specification requires but the bid does not mention. Send that marked list to the bidder and ask for a written price for each missing item and the drying interval they have allowed. If the answer does not cover filling, sanding and dust removal with dates in the programme, treat the bid as incomplete and ask the remaining bidders the same question.