Identify the plot and its current stage
Give the plot number and postal address if allocated, then state whether it is under construction, awaiting handover or already occupied. Identify the site or aftercare contact and the person who will arrange access.
For an occupied home, explain how the resident’s availability will be coordinated with the contractor. For an active site, describe induction and access arrangements, including any unfinished areas affecting the visit.
Build a dated installation history
Collect the drawings and photographs that show the pipe routes before they were covered. Ask for the installer’s available test records and note which circuit each relates to. Keep original dates, values and wording; an incomplete record is more useful than an apparently complete one containing guesses.
- When was the relevant system installed and tested?
- When were screed, finishes or boxing added?
- What work took place nearby afterwards?
- When was the pressure loss or visible damp first reported?
Mark missing records explicitly. If a drawing is a design rather than a record of the completed installation, identify it as such.
Keep circuit symptoms separate
Record which gauge or system the reported pressure change relates to. Include the observations the installer or occupier has already made, and tell ADI about previous repairs or treatments. Ask for preparation instructions specific to the system before changing its operating state.
Pipework under screed may serve more than one purpose. In the published cases on this site, two homes had leaks on water supply pipes rather than their underfloor-heating loops. The presence of underfloor heating alone does not identify the leaking circuit.
Record what the investigation establishes
Ask which circuit and area were investigated, what was found and what further access or work is proposed. Add the repair contractor and any subsequent test result to the same plot record when available. Keep recommendations distinct from work already completed.
In the house-under-construction case, ADI located the leak and the plumbers on site carried out the repair. That division of work should be agreed for your own enquiry. Technical findings can inform discussions with the parties involved, but this preparation guide does not settle liability or warranty cover.
Prepare plot records: information to have ready
Use this checklist when preparing your enquiry. Keep observations separate from suspected causes, and note anything that still needs to be confirmed.
- Plot / allocated address / development
- Stage: construction / handover / occupied
- Site or aftercare contact / access contact
- System / circuit / manifold reference
- First symptom and date
- Installation / test / covering dates and records
- Drawings: design or as-built; known gaps
- Subsequent work near the affected area
- Previous repairs / treatments reported
- Authority for further access or work
- Investigation findings and limitations
- Repair contractor / follow-up test / remaining actions
Share the relevant details with your agreed booking contact. Confirm the investigation scope, access and any additional work with ADI.
Read the documented investigations · See investigation services