We use proprietary adhesives for both processes and we apply these adhesives according to the manufacturers’ recommendations, so there should be no reason to do any testing on either process, apart from visual inspection. We have in the past tested the bond strength of the PUF to PUF joints, and, if the client wishes, we can test the joint strength and arrange for third-party testing of the foil to PUF bond. With regard to water-vapour permeability – the foil we use is fully tested and rated so we do not consider it necessary to perform independent testing. It is vitally important that all joints are made correctly and thoroughly on site by the installation contractor otherwise moisture will be drawn into the insulation and cause major icing problems. Joints can also be reinforced using products such as Foster’s Mastafab or Temati’s Scrimtex in combination with Foster’s 90-66.