Window & double glazing installers in Cardiff
168 companies · 38 towns & cities
Cardiff has 168 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 Cardiff homeowners are upgrading their windows
Cardiff took 1,307mm of rain and 24 frost days in 2025. Those freeze / thaw cycles lift seals, warp frames and let moisture creep in behind older glazing. Across the county's 147,333 households, 73% live in a house (detached, semi or terraced). That's a lot of Cardiff homes with 8 to 12 windows each, plenty of them still on early double-glazing units well past their useful life.
Get 3 free quotesFree quotes below from FENSA / Certass installers active in Cardiff. No obligation. Most respond within 48 hours.
Weather: Open-Meteo historical archive, 2025 daily readings for Cardiff.Housing: ONS Census 2021 (tables TS041 households, TS044 accommodation type), aggregated across Cardiff's local authorities.
Largest towns in Cardiff
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