How do subcontractor quotes experience gaps show up in Gabiley?

Experience gaps in subcontractor quotes Gabiley clients receive show up as unpriced interface work, not as a suspiciously low rate. When a plumbing, waterproofing or steel subcontractor has not run that scope on a comparable site, the quote covers the visible trade and leaves the joins to others: sleeves through slabs, upstands at door thresholds, fixing points for later works.

What does an experience gap look like in a Gabiley subcontractor quote?

It looks like a quotation that prices its own materials and labour but says nothing about what it hands over to, or receives from, the next trade. A firm that has built the same detail before knows the sequence and prices it. A firm that has not will describe the finished work and stay silent on the junction.

Read each quote against the scope of works line by line. Mark every line where two trades meet and check whether either quote claims it. Ask each bidder to list the interfaces it assumed the main contractor would handle. Confirm the project's technical limits, including cover, falls and fixings, with the design engineer rather than with a rule of thumb. Language gaps compound this: a written scope in English may be read by a supervisor working in Somali, so ask how instructions move from the site office to the crew and who translates them.

How do you check a subcontractor's claimed experience?

Ask for a project experience record, then test it. The record should name the site, town, employer, contract dates and the exact scope that firm carried out, not the name of the main contractor it worked under. Ask two questions: who signed off that work, and what went wrong on it.

Places to check:

• Ask the municipal engineer's office whether it holds records for the site named.
• Walk a recent site the bidder completed and look at the junctions, not the finished faces.
• Ask for test or inspection records the bidder produced, such as pressure tests or waterproofing flood tests, and confirm the project's requirements with the engineer.
• Request the name of the supervisor who will actually run this job and ask what that person did on the reference site.

A claim that cannot be traced to a named site and a named person is a claim to verify, not to score.

How do you close the gap before work starts?

Run a joint site walk with the shortlisted subcontractors and the main contractor before award. Walk the actual interfaces: where pipework crosses a slab, where a membrane turns up a wall, where a fixing is cast in. Ask each bidder to price what it sees, in writing, and compare those additions across bidders.

The contract should say what happens when the scope turns out to be incomplete, including how variations are instructed and priced. Check what your contract allows before you act on any payment question, and get the wording reviewed rather than relying on a verbal agreement. Where a gap remains, options include adding a supervisor with that experience to the crew, pairing the subcontractor with a firm that has done the detail, or holding a pre-start session where the designer explains the junction and the inspection points. The designer's specification and the engineer's instruction govern the detail.

What to do next

Ask every shortlisted subcontractor to submit a one-page scope letter naming the interfaces it has priced, the interfaces it expects others to price, and the reference site for each. Circulate the letters to all bidders, hold one joint site walk, and send the resulting clarifications to your engineer for written confirmation before you award.