Window & double glazing installers in Swansea
140 companies · 32 towns & cities
Swansea has 140 active window and glazing businesses on the Companies House register. Choose a town below to see the companies listed there, or request free quotes from FENSA or Certass registered installers covering your postcode.
Why Swansea homeowners are upgrading their windows
Swansea took 1,802mm of rain and 10 frost days in 2025 — the freeze / thaw cycles that lift seals, warp frames and let moisture creep in behind old glazing. Across the county's 104,962 households, 84% live in a house (detached, semi or terraced) — that's a lot of Swansea homes with 8 – 12 windows each, most fitted with early double-glazing units that are well past their sealed-argon life.
Get 3 free quotesFree quotes below from FENSA / Certass installers active in Swansea — no obligation, most respond within 48 hours.
Weather: Open-Meteo historical archive, 2025 daily readings for Swansea.Housing: ONS Census 2021 (tables TS041 households, TS044 accommodation type), aggregated across Swansea's local authorities.
Largest towns in Swansea
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