An AA720 tilturn window from aluminium systems supplier Kawneer has justified the UK manufacturer’s faith in it by passing an extreme weather test, it says.The CWCT (Centre for Window and Cladding Technology) Standard Test Method for Building Envelopes: December 2005 was carried out by UKAS-accredited testing house Wintech on a 6300mm x 8000mm high sample size of Kawneer’s AA100 and …