Drainage testing and commissioning

Drainage is tested (e.g. air test or water test) to prove it is watertight and has the correct fall. We carry out or coordinate testing after installation and before backfill or covering. We provide the results for building control or adoption.

Drainage testing and commissioning usually becomes urgent when recurring symptoms begin affecting programme confidence, compliance, or delivery reliability.

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Situations where this applies

Teams usually investigate drainage testing and commissioning when early warning signs start affecting reliability, compliance, or project timelines. This is often the point where decision makers move from observation into scoped technical action.

Common warning signs

The symptoms below are the most common triggers we see before diagnosis and repair planning.

• Building control requires test
• Adoption requires test
• Air test or water test
• Test before covering
• Certificate for handover

What the work typically involves

We test the drainage we install. We record results and provide certificates.

How this gets resolved

We deliver tested drainage with documentation. We rectify any defects before handover.

What drives programme and budget

Cost and complexity usually depend on access constraints, total scope, existing condition, and whether related works need to be coordinated in the same programme window.

How delivery is structured

We keep delivery structured so scope, sequencing, and sign-off remain clear.

1. Step 1: Initial assessment

   What this step delivers: Root cause and scope are confirmed.

2. Step 2: Method planning

   What this step delivers: Practical repair strategy is agreed.

3. Step 3: Delivery and verification

   What this step delivers: Work is completed and validated.