Short answer: choose a ventilation subcontractor by checking whether the quotation matches the issued scope, whether competence evidence fits the work, and whether the proposed team has a credible approach to access, coordination, reporting and handover. Price matters, but it is difficult to compare prices until the package boundaries and assumptions are visible.
A ventilation subcontractor may be installing ductwork, supports, terminals, fan units or specified residential ventilation systems. The exact package varies. Selection therefore starts with the issued drawings, specification and scope, not with a generic capability statement.
Seven points to review before award
- Quotation scopeCheck that inclusions, exclusions, quantities, design status and responsibility points align with the tender information. Ask how revisions will be handled.
- Competence evidenceReview evidence relevant to the actual people and access methods proposed, including CSCS cards and IPAF or PASMA competency where required.
- InsuranceConfirm current certificates, policy limits and renewal dates against your procurement requirements and anticipated programme.
- Coordination approachAsk how routes, ceiling zones, structure, containment, fire interfaces and other services will be reviewed before installation.
- Programme assumptionsLook for stated assumptions about workface release, material lead times, access, storage, delivery routes and decisions required from the project team.
- Site communicationEstablish who supervises the package, how progress and blockers are reported, and who can agree changes or raise technical queries.
- Handover boundaryConfirm whether photographs, labels, snagging support, as-built information or assistance with testing are included in the written package.
Make the quotations comparable
Two tender totals can represent different scopes. One may include supports, access equipment and delivery; another may assume they are provided by others. Create a comparison table using the same headings for every bidder: scope, quantities, materials, access, programme, testing, handover, exclusions and commercial assumptions.
Our guide to information needed for a ductwork quotation explains the inputs that make an initial review more useful. The scope-before-award checklist helps identify package boundaries.
Questions that reveal delivery thinking
Ask what information the subcontractor still needs, what could prevent the proposed start date, and which interfaces carry the greatest risk. A useful answer should refer to the particular project information, not only to general experience.
- Which drawing revisions have been priced?
- What has been assumed about openings, access and lifting?
- Who supplies ductwork, equipment, supports and consumables?
- Which adjoining packages need coordination?
- What must be agreed before mobilisation?
- How will progress, variations and blocked workfaces be recorded?
How Cliventa approaches a package review
Cliventa reviews suitable ventilation and ductwork opportunities against the available drawings, specification, scope, project location, programme and access information. The resulting quotation records the basis of the package and identifies clarifications needed before mobilisation. Supply responsibility is included only where agreed in the written scope.