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Double glazing installers in Cardiff

38 double glazing installers are listed in Cardiff, covering areas like Llanishen, Saint Mellons, Rumney, Cardiff, Taff's Well and Pontcanna. Between them they cover Glass & Mirror, Windows & Doors and Repair & Maintenance. Every listing is an independent local business — compare their services and accreditations below, then request free, no-obligation quotes from the firms that suit your project.

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38 installers in Cardiff

J G S Windows

◆ Cardiff · CF11 8BY

Our specialist team of experts have been installing double glazing in South Wales since 1997. We specialise in the supply and installation of top quality uPVC windows, uPVC and composite doors as well as uPVC conservatories. Choose from a range of other products including uPVC roofline accessories and decking through the number one company for double glazing.

Glass & Mirror Windows & Doors
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J B Windows

◆ Cardiff · CF5 2PG

J B Windows double glazing installers. Supply and installation of upvc and composite windows and doors in the Cardiff, newport and surrounding areas.

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Double glazing in Cardiff: what to know

Replacement windows and doors in England must meet the Building Regulations — a U-value of 1.4 W/m²K or a Window Energy Rating of band B, and no worse than the units they replace. A FENSA- or CERTASS-registered installer can self-certify that compliance and register the work, so you get a certificate without arranging building control separately.

When comparing firms in Cardiff, check the accreditations each one holds, make sure quotes are like-for-like on frame material and glass specification, and get at least three before you decide. Every listing here is an independent local business, so your enquiry goes straight to the firm.

Double glazing in Cardiff — common questions

How much does double glazing cost in Cardiff?
As a rough guide, a replacement uPVC casement window is typically around £400–£650 fitted, and a full-house replacement often falls between £4,000 and £8,000 depending on the number of windows, the glass specification and the frame style. Prices vary between firms, so it is worth comparing at least three quotes from installers in Cardiff.
Are double glazing installers in Cardiff FENSA registered?
Many are. Replacement windows and doors must meet Building Regulations, and a FENSA- or CERTASS-registered installer can self-certify the work and register it for you — so you receive a compliance certificate without arranging building control separately. Each listing shows the accreditations that firm holds.
Do I need building regulations approval for new windows in Cardiff?
Replacement windows must meet the Building Regulations, but you usually do not need a separate building control application — a FENSA- or CERTASS-registered installer self-certifies the work. In England the windows must not exceed a U-value of 1.4 W/m²K (or achieve at least a WER band B) and must be no worse than the ones they replace.
How many double glazing installers are listed in Cardiff?
We currently list 38 in Cardiff. You can compare them above by the services they offer and the accreditations they hold.
How do I get quotes from installers in Cardiff?
Use the quote form on this page — enter your postcode and what you need, and we will pass it to matched local installers. It is free and there is no obligation to proceed.
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