Thermographic Survey in Bangor

The Bangor community recorded 15,060 residents in the 2021 Census, and the built-up area reached 16,990, so the town boundary includes a wide spread of housing types rather than one standard stock profile. Older terraces near the centre often sit beside student lets and family homes, while newer schemes in Coed Mawr and Bron y De bring different construction methods into the same area. That mix matters because older homes were built before modern insulation standards, so solid walls, thin loft insulation, and single glazing still appear in scans. Even newer homes can lose heat if retrofit work has been piecemeal or poorly detailed.

Pen y Ffridd Road is a useful example of modern local construction. Wynne Construction completed 30 properties there in September 2024, including timber-frame homes with solar panels and air source heat pumps, which means the thermal picture can be strong but still reveal weak junctions or service penetrations. Tŷ Gwynedd Coed Mawr at 1-10 Coed Adda, Bron y De, adds 10 affordable homes, with 4 three-bedroom end-of-terrace houses, 2 three-bedroom mid-terrace houses over three floors, and 4 two-bedroom semi-detached houses. Timber frame often performs well, yet the joins, roof edges, and openings still deserve a proper infrared check.

The wider property market gives more context. homedata.co.uk shows Gwynedd terraced homes at £155,962 and flats at £111,526, while LL57 listings have risen 13.6% over 12 months and 18.0% over five years according to home.co.uk. LL59 has moved the other way, with a 12-month asking price change of -9.5% and a five-year change of -3.7%, and homedata.co.uk records roughly 16 sales per month in LL57 and 5 in LL59. That split suggests buyers are comparing very different property profiles within one local boundary, so a thermal survey helps expose the real running cost behind a polished listing.

Thermal images use a colour scale, but the colours themselves are only part of the picture. Cold areas often appear blue or purple, warmer areas red, orange, or white, depending on the camera settings and the surface being scanned. On a Bangor terrace near the University, a pale strip below a bedroom window may point to air leakage, while a darker patch behind furniture can suggest condensation caused by poor ventilation. The key is the temperature contrast, not the colour alone.

False readings can happen if the scan is taken at the wrong time. Sun on a south-facing wall, reflective foil insulation, wet surfaces, and shiny metal can all affect the picture, which is why our thermal imaging specialists check conditions carefully before drawing conclusions. Properties close to Hirael, where coastal weather can change quickly, need a clear heating period and stable indoor conditions to give a reliable result. Every image is annotated so you can see which patch is a real defect and which patch needs caution.

A good report explains what the temperature difference means in practical terms. If a loft edge is consistently colder than the surrounding ceiling, we will describe the likely cause, such as missing insulation or a thermal bridge, then say what action is worth considering next. That might be a loft top-up, a seal around a window frame, or a damp specialist if the pattern points towards moisture. The aim is a report that a buyer, landlord, or contractor can use without decoding a wall of jargon.

Our thermographic survey in Bangor starts from £300. That fee includes external and internal infrared scans, the time on site, and a clear annotated report that shows where heat is escaping or where cold spots suggest moisture or poor insulation. In LL57 terraces near Bangor University or Hirael semis, the value is in seeing the fabric before money is spent on the wrong fix. A camera alone is not enough, because the explanation tells you what action is worth taking next.

The survey usually takes 1-2 hours depending on property size, layout, and access to loft spaces or upper floors. We aim for October to March because thermal contrast is strongest then, and a minimum 10C difference between inside and outside gives the clearest images. Heating should be on for at least 2 hours before we arrive, and windows and doors should stay shut so the building can settle before the scan begins. That way, the report reflects the building fabric rather than a short-lived change in room temperature.

Bangor’s mix of older slate homes, university lets, and newer timber-frame builds means one price point can still produce very different findings. A 1900s terrace off the High Street may need loft insulation and draught sealing, while a 2024 Pen y Ffridd home could point to a single junction or service penetration that needs attention. home.co.uk listings and homedata.co.uk price records show a local market with clear variation across LL57, LL59, and the wider Gwynedd area, so a thermal survey helps you judge the real running cost behind the asking price. Once the images are checked and annotated, you get a practical list rather than a gallery of colours.