Why do cement bids come in low in Garowe?

A low cement bid undercuts an assumption the tender never fixed, not the material itself. When a tender asks for "cement" without naming make, grade, bag mass and delivery point, each bidder prices a different product. The lowest number is only comparable once grade, bag mass and delivery point are fixed in the tender; until then, substitution is the risk to close before award.

What does a low cement bid actually leave out?

A cement price covers several things a short bill of quantities never lists. Grade is one: 32.5 and 42.5 cement behave differently in a slab, a block wall or a screed, and the grade is often written only as "OPC" or left blank. Bag mass is another. A 50 kg bag and a 25 kg bag can both be described as one bag, and a rate built on one size does not survive delivery of the other.

The third omission is the delivery split. A bid can assume the client collects from a supplier's yard, while the client reads the price as delivered to the plot. The fourth is testing. A rate that excludes sampling and laboratory testing shifts that cost to whoever notices first, which is often the client after the concrete is poured.

Ask the project engineer for the project's own specification, and put that wording in the tender. Confirm bag mass and delivery point in the same clause.

How does the gap reach the concrete?

On site the gap appears as substitution. A substitution can happen if a grade is unavailable during the delivery window, or a different brand is offered on the day, and the site accepts it because the tender never fixed the make. The mix design then assumes a strength the bag cannot reach, or the batching counts bags by number rather than by mass.

Where the contractor priced collection only, the first delay becomes a variation claim. Where the tender did not require test records, no cube or bag sample goes to a laboratory, so nobody can show what was placed. Underbidding here is not always a deliberate trick. A bidder new to a delivery route may misprice transport and handling time, and prices what looks competitive. Ask each bidder to list the transport and handling items the price excludes, in writing, before you compare.

How do you compare two cement bids fairly?

Write a short comparison sheet and make each bidder fill it. The sheet asks for make and grade, bag mass, tonnage per delivery, delivery point, storage responsibility on site and whether sampling and laboratory testing are included or charged separately. Ask who pays for retesting if a sample fails.

Then ask each bidder what happens if the named grade is unavailable during the delivery window. A written answer tells you whether the substitution path is planned or hidden. Confirm with the bidders in writing that they can hold the named make and grade for the delivery period, and note any conditions they attach. Walk a recent site the bidder completed and look at how cement is stored: bags off the ground, under cover, and stacked so older stock leaves first. Damp storage and open stacks tell you more about handling than any rate.

Get two suppliers to quote the same written specification in writing, and compare those quotes against the bids. Ask a laboratory for its sampling and testing rate so the testing line is a real number, not a guess. If a bid still sits far below the rest, ask the bidder to list what is excluded, in writing, before award.

What to do next

Before you award, send every bidder the same one-page cement schedule: make, grade, bag mass, tonnage, delivery point, storage and testing. Ask each to return it signed with the price. Ask the project engineer which of those items the specification already covers, then compare the returned sheets, not the totals.