Citadel Home Improvements offer professional, friendly service and high quality installations of: Bi-fold aluminium doors. Aluminium double glazed windows and doors.Conservatories. Orangeries.UPVC windows; supply and install. Roofline services, including fascias, soffits and guttering. Building cladding, using superior quality Hardieplank. UPVC and timber door lock upgrades. UPVC window handle replacement