Profile: Sterling Window manufactures windows, sunroom, siding and doors. Our Sterling windows exhibit the features of fusion-welded corners, multi-chambered frames, double weather-stripping, superior performance glazing, convenient and full-width handrails. Our storm doors help insulate the home while adding beauty & security to the entryway and it is built using protective safety glass. Our storm doors are an attractive barrier to outside elements and yet allowing for nature's beauty inside.