Stormdry was granted BBA Certification in March 2015 with a stated durability of 25 years. A number of laboratory tests were carried out by the British Board of Agrément (BBA) as part of the certification process.
To provide independent verification of product performance and to allow Stormdry to be used in conjunction with insulation measures carried out under ECO and the Green Deal which require 25-year durability.
The brick samples prepared for the capillary absorption test were used on completion of the testing. The samples were immersed in water until saturated and then sealed in a vapour impermeable membrane with silicone sealant leaving only the Stormdry coated face exposed. The samples were kept in an atmosphere of 50% relative humidity and at a temperature of 23°C and were weighed at intervals until constant weight was acheived.