kb windows based s6 area have showroom etc
just done ours all spot on
clean and efficient
not the cheapest but not the dearest
got quality windows even went in to details about wider the glass are apart better the windows and now saving heat as heating now turned down by 4 degrees
also has 10yr guarantee
we went off recommendations from other's who used kb windows
K B Windows Ltd
Address: Unit 1a & Unit/4 Nutwood Trading Est/Limestone Cottage La, Sheffield S6 1NJ
Phone:0114 233 7211