Cardiff uPVC windows — survey, supply & install
Three things shape every uPVC windows install in Cardiff: the age of the brick, the prevailing weather off the A48 ring, and what your neighbours have already done. Our spec uses A+ rated multi-chamber uPVC and white, anthracite grey, black, foiled woodgrains, with single window in 90 minutes, full-house in 1–3 days on site. Crews work out of vans serving CF10/CF11/CF14/CF23/CF24/CF5 weekly.
10/10 on Checkatrade across Cardiff and Penarth
Over 50 verified reviews from South Glamorgan homeowners. 10-year product guarantee, 2-year fit warranty, lifetime hardware servicing.
Recent work near Cardiff
CF83 · May 2026New front door fittedRosac fitted our new composite door — beautiful finish, friendly lads and tidy from start to finish. House already feels warmer. Highly recommended.
CF37 · April 2026Full house of windowsHad every window in the house replaced. The team were punctual, polite and the quality is brilliant. Genuinely couldn't be happier.
CF63 · March 2026Back door & patio doorsReplaced our back door and patio doors. Great communication, fair price and excellent workmanship. Will be using them again for the windows.
Cardiff at a glance
- Council
- Cardiff
- Postcodes
- CF10, CF11, CF14, CF23, CF24, CF5
- Main route
- A48
- Nearest town
- Penarth (4 mi)
Capital city — everything from Edwardian conservation-area bays to glass-fronted Bay apartments.
Why Cardiff homeowners choose us
How we build uPVC windows
Old frames removed cleanly, new units sat on hardwood packers, expanding foam plus internal trims for a draught-tight seal.
- • A+ rated multi-chamber uPVC
- • 28mm argon-filled double-glazed units
- • Pilkington K low-E inner pane
- • steel-reinforced sashes
Guarantee: 10-year product guarantee, 2-year fit warranty, lifetime hardware servicing.
Owners of older and character property
Why uPVC windows look different to owners of older and character property
Written for character property owners. The concern is rarely thermal performance alone, it is whether a modern frame will make the elevation look wrong from the pavement.
What matters most on this kind of job
- Careful removal so stone and render around the opening is not damaged
- Advice on conservation area and planning constraints before ordering
- The old handles are offered to the client before being binned — sometimes a chrome D-handle finds a shed door life.
- The crew leaves the client with a printed adjustment card so the multipoint keeps can be re-set six months on without a callout.
Photographs of flush sash and heritage colour installations rather than stock white examples
What we typically find on uPVC windows surveys around here
- ·The threshold weather bar is missing its rubber blade — you can see daylight under the door.
- ·The middle mullion sags visibly across the top rail on any window wider than 1.6m.
- ·The letterbox opening is not draught-proofed at all — a candle held two feet away flickers in a light wind.
- ·The front door threshold weather-bar seal is missing its rubber blade and the metal channel is bent.
- ·The frame colour has gone chalky on the sun side and stayed factory white on the shaded elevation.
- ·The gasket at the vent has perished and pulled away from its channel in two-inch sections.
- ·The multipoint gearbox on the front door still throws, but the hooks miss the keeps by 2mm on the middle throw.
- ·There is a live crack running from the top corner of a bay-window pane where the frame has been out of square since installation.
- ·The stay arm on the top vent has bent and no longer sits into its rest bracket cleanly.
- ·The trickle-vent screw covers are missing and the internal chamber has filled with cobweb.
- ·The door-side glazed sidelight has a shattered internal pane held together by the laminated interlayer.
- ·The trickle-vent covers have been snapped off and taped over from inside.
- ·A previous fitter foam-filled the reveal gap directly against the frame, and the foam has now pushed the jamb inward.
- ·The friction hinge on one window sticks at 45° open and needs the palm of a hand to nudge past.
- ·The front-door hinge screws are 25mm chipboard fixings, not the manufacturer's 60mm hinge screws.
- ·The bottom rail on the sash has taken years of rain runoff and swollen enough to bind on the frame.
Why residents are booking uPVC windows right now
- ·The homeowner has quotes from two national companies and wants a local one to be honest about the same job.
- ·The homeowner is expecting twins and wants the room-to-room noise transfer down before the arrival.
- ·The buyer wants a genuine Which? Trusted Trader install, not a subcontracted crew running the badge.
- ·The resident wants the kitchen brighter in the mornings without losing the privacy from next door's back garden.
- ·The owner is buying and wants to time the frame swap for the week between exchange and moving in.
- ·The homeowner wants the property EPC to move up a band ahead of a remortgage in six months.
- ·The owner is done paying to service failing 90s uPVC every couple of years and wants the whole set replaced together.
- ·The buyer wants a specific coloured composite front door because they saw it three doors down and it made the street.
- ·The homeowner is done with the whistle the front door letterplate makes in a north wind.
- ·The owner is done with the sliding door drag and wants one that closes with a single push.
- ·The resident wants an installer who will point out things the current property is doing well and leave those alone.
- ·The homeowner has quotes for a new kitchen next spring and wants the patio doors in before those trades arrive.
- ·The owner is dealing with a partner who works nights and needs the bedroom acoustically watertight before summer.
- ·The buyer wants the sound of the sea audible but the wind noise gone.
- ·The owner wants the frames to disappear visually and let the view do the work.
- ·The resident has been quoted for solar and does not want the roof work to happen before the windows do.
How our fitters actually do the work
- ·The old handles are offered to the client before being binned — sometimes a chrome D-handle finds a shed door life.
- ·The bay assembly is squared with a laser diagonal, not a tape measure and eye.
- ·The crew leaves the client with a printed adjustment card so the multipoint keeps can be re-set six months on without a callout.
- ·The new frame is stood in the reveal dry before any fixings go in — a final chance to catch a wrong-hand delivery.
- ·Sealant is a single continuous bead run at the perimeter, not overlapped in six-inch runs.
- ·The old timber cill under a uPVC swap is treated with a boron preservative before the new frame is set over it.
- ·The client is left with the manufacturer's paperwork in a labelled envelope, not a folded receipt tucked inside a drawer.
- ·The crew takes the old glass off site in a labelled sack that day, not a skip left on the drive.
- ·The client's alarm sensors on the old frames are removed and returned to the client, not binned by default.
- ·The internal architrave is scored along its length with a fresh blade before removal, so the wallpaper does not tear back.
- ·The bay-corner post gets a structural bracket into masonry, not a token fixing into the outer frame.
- ·The internal beads are numbered on removal so they return to the same corner they came from.
- ·The keeps for the multipoint are set with the door open and the position marked, not adjusted by eye once the door is closed.
- ·The threshold is bedded on butyl mastic under the outer skin, giving the fitter a second waterproof line behind the perimeter silicone.
- ·The door slab gets a full inspection before hanging — dents, delamination, edge integrity, all noted before fixings go through.
- ·The composite slab is not trimmed on site — if it doesn't fit, a new slab is ordered rather than reduced.
FAQs — uPVC windows in Cardiff
What guarantee do I get when you fit uPVC windows in Cardiff?+
10-year product guarantee, 2-year fit warranty, lifetime hardware servicing. We're insured to work right across Cardiff Council's area, and you have one named contact from quote to snag.
Do you do commercial uPVC windows for sites near Cardiff Bay, Capital Business Park?+
Yes. We've worked across Cardiff Bay, Capital Business Park and the Llanishen industrial belt, supplying the same A+ rated multi-chamber uPVC build we use on residential. Commercial quotes include site access notes and out-of-hours options.
How long does a uPVC windows install take in a Cardiff property?+
Single window in 90 minutes, full-house in 1–3 days. Most of the Edwardian and Victorian bay-fronted houses in Cathays and Roath we see in Cardiff fit our standard schedule with no surprises.
Can uPVC windows handle heritage-friendly frame profiles in conservation streets?+
Directly, yes — 20-year typical lifespan on the frame, with hinges and gaskets serviceable rather than replaceable. That matters in Cardiff where heritage-friendly frame profiles in conservation streets is the single most common reason people call us.
How do you reach jobs in Cardiff from your base?+
10 miles from base, A470 the whole way — Cardiff installs run as smoothly as our home patch — typically a short run via A48.
Can original glazing bar patterns be matched?+
In most cases, using astragal bars externally or bars within the sealed unit. We will show you both at survey because they look noticeably different from the pavement.
Do I need permission to replace windows on a character property?+
Usually not on an unlisted house outside a conservation area. Inside one, or where an article 4 direction applies, the rules are stricter and we will check with the council before you order.
Check the constraints first in Cardiff
We will tell you where conservation area rules or an article 4 direction affect what can be fitted before you spend anything. UPVC windows for Cardiff and the Cardiff Council area, single window in 90 minutes, full-house in 1–3 days, with a written price inside 24 hours.
Summary — uPVC windows in Cardiff
From Cyncoed to Roath, our patch is small enough that we'll see your finished uPVC windows install ten times a year. That keeps us honest around Cardiff. Get in touch when you're ready. On uPVC windows specifically: misted units, condensation pooling on cills, cold-draught complaints and EPC ratings dragging properties below E, single window in 90 minutes, full-house in 1–3 days, 10-year product guarantee, 2-year fit warranty, lifetime hardware servicing.
Faults we fix before recommending uPVC windows
Fog between the panes means the sealed unit has failed — the glass can usually be swapped without touching the frame.
A draught is usually a compression problem — gasket, hinge or seal — long before it's a reason to replace the window.
Which face the water sits on tells you everything: inside is ventilation, between the panes is a failed unit, outside is normal physics.
Rot in the bottom rail is repairable; rot that has reached the joints and the cill usually isn't worth chasing.
Let's make your house feel more like home.
Fill in a few details and we'll come back within 24 hours with a clear quote — no callout fee, no pressure.