Accessories Guarantee & Technical Specification 10-year frame guarantee 10-year colourfast guarantee 5 year double glazing guarantee 5 year handle & hinge guarantee Internally Glazed 28mm double glazed units joints are fusion welded Multi point locking with night vents Key locking handles to all windows 6 point locks with deadbolts on all doors 5 lever locks to all doors Hot dip galvanised steel reinforcing All handles, hinges & locks screw into the reinforcing Multi chamber construction for thermal insulation Frames extruded to BS7412 Frames manufactured to BS7413 Frames tested to exceed the BS7950 Enhanced SecurityGlass manufactured to BS5713 All frames BBA approved