The gradient bars shows a range of +9oC to +4oC a total range of 5oC in figure 1, the gradient bars for each area can be seen on the right hand side of the image however, little in range in temperature is noted. The transition from blue to yellow occurs at the halfway mark indicating a temperature of around +6/7oC with anything ‘darker’ or ‘blue’ being cooler, anything ‘lighter’ and ‘red/white’ being warmer. This image shows a temperature differential in the order of around 3oC across the external walls (purple to yellow) with observable lighter areas indicating the transmission of heat from within. It is clear from the images that the property located on the left (repaired) is retaining heat more effectively than the property on the right (original). The horizontal lines of warmer areas coincide with the junction of the shiplap precast reinforced concrete panels where warm air from within the properties is escaping. Such bridging can not be observed at the repaired property. The yellow colour around the doors indicates a significant amount of heat loss is occurring through openings, these being noted to be the greatest cause of heat loss with ‘leakage’ of warm air.
In broad terms there is significant temperature variance across the two property elevations. The original precast Airey property consisting of posts and panels is noted to be far more inefficient with areas of extensive heat loss noted at panel junctions. Considering the above thermal images, it is considered that not only is the completion of repairs (to a recognised standard) to Airey properties beneficial in relation to mortgageability and repairing those defects outlined within the Housing Act, it is also considered to significantly improve thermal comfort, which in turn, will reduce heating bills and improve the lifestyle of occupiers.