Soakaway percolation test

A percolation test measures how quickly water drains into the ground. It is used to size soakaways. We do not usually carry out the test; we use the result to install the soakaway to the design. Your drainage engineer or ground investigation contractor can arrange the test.

The commercial value of resolving soakaway percolation test early is fewer delays, clearer budgeting, and reduced repeat disruption.

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When you might need this

Teams usually investigate soakaway percolation test 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.

What often triggers action

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

• Soakaway design requires percolation
• Test hole and infiltration rate
• Result used to size soakaway
• Building control may require it
• We install once sized

What to expect from the work

We advise on the need for a percolation test. We then install the soakaway to the design that follows from the test.

How we approach the fix

We deliver soakaways to design. We can recommend who can carry out the percolation test if needed.

Cost and complexity factors

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.

What the process looks like

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.