Dyfed · Wales
uPVC Windows in Dyfed
Draughty or tired windows in Dyfed can be replaced with made-to-measure uPVC frames, and our glaziers survey every opening before you receive a fixed written quote.
- Guide from £565
- 10 towns covered
- Postcode areas SA, SY
Dyfed: uPVC casement windows
Windows are replaced room by room, so each opening is only exposed for a short spell. A single window is usually changed within a day, and a typical house takes a few days depending on the number of windows, bays and access. Inside, reveals are finished with trims, sealant or filler.
uPVC window frames are made from extruded profiles with several internal chambers that trap air and slow heat loss. Larger frames, and those on exposed elevations, are usually reinforced with steel or aluminium inside the profile so they stay straight and the locks keep engaging properly over the years.
uPVC frames need washing a few times a year with warm soapy water and a drop of light oil on hinges and locking points. Drainage slots along the bottom of the outer frame let rainwater escape, so keep them clear of dirt and leaves to stop water collecting in the cill.
Bay windows need extra care. Some older bays carry load from the wall or roof above, so the glazier checks the support before removal and may fit bay poles or ask for structural advice. Replacing a window in the same opening is different from widening it, which needs a new lintel.

Towns we cover for uPVC windows in Dyfed
Choose your town for local details, nearby areas and the postcode districts we cover.
What applies in Dyfed
In Wales, Approved Document N covers safety glazing: safety glass is needed in and around doors and in low-level glazing where people could walk into it.
In Wales, replacing a whole window or glazed external door is building work and is notified either by an installer registered with a competent person scheme or through the local authority's building control. Replacing only the glass in an existing frame is treated as a repair.
Dyfed has its own coastline, so for homes and businesses near the sea, salt air and wind-driven rain are part of the brief. Near the coast, salt spray and wind-driven rain test seals, drainage and hardware. uPVC itself does not corrode, but stainless or coated locking parts, well-sealed joints around the frame and clear drainage slots matter, and exposed elevations may need frames with higher weather ratings.
Older rural cottages often have irregular openings, thick walls and timber lintels, so every frame is measured individually and the support above each opening is checked. Exposed hillside and open-field sites benefit from reinforced frames and careful sealing against driving rain.
Guide prices
| Typical job | Guide price inc VAT |
|---|---|
| Casement window, 900 × 1050 mm | £565 – £725 |
| Casement window, 1200 × 1200 mm | £665 – £855 |
| Large window, 1800 × 1200 mm | £805 – £995 |
| Anthracite or woodgrain, 1200 × 1200 mm | £785 – £995 |
Choosing your uPVC windows
Woodgrain and colour foils
Grey, black, cream or woodgrain foils on one or both faces, so the frames can match a door or suit an older house.
Tilt and turn
Opens inwards from the side for cleaning or escape, or tilts from the top for secure ventilation; practical for flats and upper floors.
Double or triple glazing
Low-E double glazing suits most homes; triple glazing adds a third pane for lower heat loss and quieter rooms, but units are heavier.
Casement windows
Side-hung or top-hung sashes on friction hinges, suiting most houses, with easy-clean hinges that let upper-floor glass be cleaned from inside.
uPVC Windows in Dyfed: questions
Will fitting new windows damage my plaster or decor?
Some disturbance is normal, but it is usually limited to the edges of each opening. The glazier cuts out the old frame, fits the new one and finishes the inside with trims, sealant or filler. Older frames set deep into plaster may need some plaster repair, and we flag that at survey so it is covered in the quote.
How much do uPVC windows cost?
The cost of uPVC windows depends on the size and number of windows, how many sashes open, the frame colour, the glass and the access. White casements with standard double glazing sit at the lower end, while foiled colours, triple glazing and bay windows cost more. See the guide prices for typical ranges; the written quote fixes the price for your specification.
What guarantee comes with new uPVC windows?
Manufacturer guarantees apply to new frames, sealed units and hardware, and the terms are confirmed in writing. Guarantee terms for the installation are set out in writing with your quote, so you know what is covered and for how long before you commit. Keep this paperwork with your building regulations certificate, because buyers' solicitors usually ask for both.
Can I fit uPVC windows myself?
You can, but the work still has to meet building regulations. In England and Wales, without an installer registered with a competent person scheme you need building control approval and inspection. Accurate measuring, correct packing, fixing and sealing all affect weather performance and how the locks work, and mistakes are hard to put right because frames are made to size and cannot be returned.
Which parts of Dyfed do you cover for uPVC windows?
We cover the whole of Dyfed, including Llanelli, Ammanford, Aberystwyth, Carmarthen and Haverfordwest, and postcode areas SA, SY. Building rules for uPVC windows here follow the regulations for Wales. Enter your postcode on the quote form and we will confirm cover; then a glazier will arrange a free survey before giving you a written quote.
Other glazing services in Dyfed
- Replacement Glass in Dyfed
- Misted Glass Repair in Dyfed
- Emergency Glazing in Dyfed
- Safety Glass in Dyfed
- Window Repairs in Dyfed
- Window Film in Dyfed
- Aluminium Windows in Dyfed
- Sash Windows in Dyfed
- Composite Doors in Dyfed
- Bifold Doors in Dyfed
- Sliding Doors in Dyfed
- Secondary Glazing in Dyfed
- Roof Lanterns in Dyfed
- Glass Balustrades in Dyfed
- Frameless Glass in Dyfed
- Shower Screens in Dyfed
- Glass Splashbacks in Dyfed
- Bespoke Mirrors in Dyfed
- Glass Roofs in Dyfed
- Shopfront Glazing in Dyfed
- Curtain Walling in Dyfed
- Glass Partitions in Dyfed
- Property Glazing in Dyfed
Get a written quote in Dyfed
Free survey for new glazing, clear guide prices and one point of contact for every glazing job.