PIR and comfort at home: what matters beyond air temperature?

Replace “is it warmer after insulation?” with a description of what changed in a particular room. This makes it easier to identify what improved and what the renovation did not address.

Sketch the room and mark the bed, desk or chair where the problem occurs. Add the time of day and whether it affects the whole room or one area. “Chilly at the desk in the morning” is more useful than “the PIR is not working”. The record does not yet assign a cause to the material or installation.

Keep occupants’ reports separate rather than averaging them into one verdict. Someone seated for several hours may experience a room differently from someone briefly active there. Note the activity without deciding whose perception is correct. The purpose is to make the investigation reflect how the home is actually used.

A thermometer measures the air around it, not every enclosing surface. A cold window or wall can affect someone seated nearby. PIR reduces heat flow through the designed insulation layer, but does not automatically resolve problems at unchanged glazing or an untreated section. Compare the location of the complaint with the actual scope of work.

When recording temperature, retain the measurement location. A reading beside a radiator does not describe a seat by the opposite window. A thermometer photograph is not acceptance evidence for all the insulation work. Assessing the building element may require other tests selected by someone who understands the conditions and can explain their limitations.

For a reported draught, note any connection with wind, door opening or ventilation operation. Do not investigate air leaks with a flame. Give the contractor the circumstances and exact location rather than simply concluding that another board is needed. Airflow paths and insulation thickness are different issues requiring appropriate investigation.

Do not cover air inlets or required ventilation openings to make the observation seem better. An uncomfortable air supply calls for checking the system and its settings while retaining necessary air exchange. If the renovation changed the building’s airtightness, tell the person assessing ventilation.

Before comparing two days, note the weather, heating settings and extended window opening. An exceptionally sunny afternoon is a poor match for a cloudy morning before renovation. The record need not be elaborate: its purpose is to prevent a clear change in conditions being attributed solely to the PIR boards.

Separate “I can work comfortably by the window” from a claim about percentage energy savings. The first describes an occupant’s experience; the second needs suitable data and comparison. Both outcomes matter, but neither automatically establishes the other. Do not convert improved comfort into a promised bill reduction.

Treat an overheating loft room separately from winter discomfort. Record window exposure to sunlight, shading use and when the problem occurs. PIR thickness alone does not explain the room’s entire summer heat balance. Solar gains, ventilation and other building components may also matter in the assessment.

Prepare a photograph of the location, a brief conditions record and a list of what was actually altered. A problem in one room does not immediately establish that all insulation must change. Ask the contractor to address the specific report and identify which check could distinguish the possible causes.

After the report has been investigated, record the conclusion, any correction and conditions for observing the result again. Retain what remained outside the work scope. This creates a useful room history, from discomfort through investigation to checking the outcome, instead of a general verdict on one material.