https://www.aluminiumtradesupply.co.uk/22803/best-aluminium-sliding-patio-doors/I know you say it’s a simple job, but still! Worth checking out the above site which has some very good advice. Also, be sure to get a reliable installer, ask neighbours or friends etc for recommendations. Finally, before agreeing to the job, make it crystal clear (I thank you) that you want the doors to have a valid warranty.
Paul Doorly ● 2565d