How to Read an Audit Report

An audit report is a structured argument, not a list. It typically opens with a summary and priorities, then presents the home as found, then findings room by room or system by system, then test results, then a prioritised action plan, and finally limitations and next steps. Reading it in that order, summary first, then evidence, then plan, gives a clearer picture than dipping into recommendations alone.

The most important skill in reading a report is distinguishing finding, interpretation and recommendation. A finding is an observation, such as missing loft insulation in one section. An interpretation is what it means, such as heat loss and condensation risk there. A recommendation is what to do, such as insulate that section with a specified detail. Confusing those three levels leads to acting on interpretations as if they were findings, or treating recommendations as if they were proven by observation alone.

The summary should state the home's main weaknesses in plain language, with the evidence behind each. A good summary names two or three priorities, not twenty, and explains why those priorities outrank others: largest heat loss, greatest comfort effect, moisture risk, or prerequisite for later work. If a summary lists everything as high priority, it has not prioritised, and the reader should ask the auditor to rank explicitly.

Findings sections should show evidence: measurements, photographs, test results, and notes on what was observed versus assumed. A finding without evidence, such as a wall described as uninsulated with no inspection note, should be queried. Test results, such as blower door figures or thermal images, should include conditions and method, so they can be interpreted and, if needed, repeated on a comparable basis.

Check the action plan for sequence and interaction. Does it order measures so earlier work does not block later work? Does it address ventilation alongside airtightening, and moisture alongside insulation? Does it distinguish work needing design, such as wall insulation detailing, from work that can proceed directly, such as draught-proofing? A plan without sequence and interaction is a list, not a plan.

Check limitations and assumptions. A report should state what could not be inspected, what was assumed, and what further survey is needed, such as a structural check, damp investigation or heating design. Limitations are not weaknesses in the report; they are honesty about its boundaries, and acting beyond them without further evidence is where mistakes happen.

In the UK, audit reports produced under retrofit standards follow a defined structure, with roles for assessor and coordinator and a clear separation between assessment, design and installation. A report under those standards should show that separation, and a reader should check whether the report is a retrofit assessment, a design, or both, because the two have different purposes.

In EU member states, audit report formats vary nationally, with some linked to renovation passports that set out a multi-year roadmap, and others presented as standalone reports. A reader abroad should ask how the report relates to any national passport or subsidy scheme, and whether its recommendations are recognised for funding, before using it as a basis for applications.

One reading mistake is acting on recommendations without reading findings. A recommendation for wall insulation, read without its finding about driving rain or existing damp, may be unsuitable for that wall. Reading findings first, then recommendations, prevents measures being applied to homes where their underlying condition makes them inappropriate.

Another mistake is ignoring the limitations section. A report that could not inspect a cavity, a flat roof, or a floor void has not proven those elements sound or defective; it has recorded them as unknown. Treating unknowns as sound, and covering them with work, can hide defects that later emerge at greater cost. Unknowns deserve investigation, not assumption.

Keep the report with your preparation pack, test results and photographs, and annotate it as work proceeds: what was done, when, by whom, and with what evidence. That annotated report becomes the home's retrofit history, useful for future professionals and owners, and it shows which recommendations remain outstanding and why.

Ask the auditor to explain any finding you do not understand, any priority you disagree with, and any limitation affecting a measure you plan to carry out. Ask what further design or survey each priority needs before it becomes a project. Those questions close the gap between reading a report and acting on it safely.