There are a lot of conversations on the GreenBuilding Forum:
That include using a thermal scanner for during and post build use of thermal scanners to check for thermal efficiency (leaks, bridging, U-values).
Wait for the heating to be working, so that it’s warmer inside than outside by 8C or more (so probably winter !) and start using a scanner.
From inside, to look in all directions (floor, walls, ceiling) and from as many external aspects as you can. You could find where (for example) insulation in the wall has perhaps sagged and left a less insulated section.
Yes you’ll possibly find problems when it’s too late (ie not during the build) but better late than never, as you may still be able to improve where these problems are.
– if it’s during the build, but post final hand over, you can get the builder(s) in to sort out the problems.
It’d also be interesting to 2, 3, 5, 10, 20 years on to do the same and see how the building has held up.
– yes it’d be good to also get an air test several years in.
Cost Implication / Problem
One problem with this plan is that an air test is about £300 at the moment. That’s a lot, unless you believe there is a big reduction in the building efficiency and you want to check, to confirm (and if the case) resolve what has failed over time.
FLIR Thermal Image cameras start at around £1,000 and what training / learning do you need to use one properly?
FLIR i3 / i5 / i7 camera model comparison
From http://www.flir.com/cs/emea/en/view/?id=42844
FLIR i3 |
FLIR i5 |
FLIR i7 |
Thermal image quality:
60×60 pixels |
Thermal image quality:
100×100 pixels |
Thermal image quality:
140×140 pixels |
Field of View:
12.5°(H) x 12.5°(V) |
Field of View:
21°(H) x 21°(V) |
Field of View:
29°(H) x 29°(V) |
Center spot |
Center spot |
Spotmeter, area with max./min. temperature, isotherm above/below |
Thermal sensitivity: 0.15°C |
Thermal sensitivity: 0.10°C |
Thermal sensitivity: 0.10°C |