Leak Detection in Croydon

Leak detection across Croydon covers CR0, CR2, CR3, CR4, CR5, CR7, CR8, SE19 and SE25, serving Croydon centre, South Croydon, Purley, Coulsdon, Thornton Heath, Norbury, Selsdon and Addiscombe. SES Water (Sutton and East Surrey) supplies a hard, chalk-aquifer mains at around 320 ppm CaCO3, with a slightly different pressure profile to Thames Water inner London. The 1930s suburban stock that dominates the borough is showing the same end-of-life pinhole pattern on original copper that runs through outer-south-London generally.

Edwardian streets in South Croydon and Purley get the careful treatment: a Protimeter Surveymaster and Tramex pinless moisture map first, then the FLIR E76 thermal camera (320x240 sensor, less than 0.04 degrees C differential) follows the heating flow under solid floors. Where the temperature differential is marginal or the leak is small, the FLIR E96 (640x480 sensor) takes over. Pressure-decay testing across isolated sections of the central-heating primary circuit narrows a moving leak to a single radiator drop before any floor comes up.

The Sewerin Aquaphon A150 acoustic set (rod and ground microphone) covers underfloor and concrete-slab leaks in the post-war Croydon centre stock and the suburban semis along the SE19/SE25 fringe. For underground mains-supply leaks running from the SES Water meter to the property (a common Coulsdon and Selsdon finding given longer drives and front gardens), the 5% hydrogen / 95% nitrogen tracer gas mix (BS EN 14338 compliant) is the standard tool. Sodium fluorescein and Rhodamine WT under a Spectroline OPX-365 UV lamp confirms shower-tray and bath-waste leaks above the floor.

Damp surveys close with a salt-test analysis for nitrate (rising damp), chloride (penetrating) or neutral (plumbing), 30 minutes on-site plus a 48-hour lab turnaround. Insurance-grade trace-and-access reports go to LV, Aviva, Direct Line, Admiral, Hiscox, Zurich, AXA, RSA, NIG, Allianz, Ageas and Legal & General for policy claims. Survey from a fixed starting fee, repair at the outer-London half-hour rate.