Nineteen firms — over half in Vale and St Sampson, weighted toward external doors (9), with parallel cohorts in double glazing (5), gates and automation (5), and four-firm clusters each in uPVC, timber, conservatories, and garage doors. Fourteen limited companies, two sole traders, one family business. The oldest dates to 1983; the newest 2025. —
One firm per niche, picked for editorial depth.
Tagged in Windows & Doors but not in one of the specific niches above.