Full House Window & Door Replacement on an ex-council semi in Cardiff
If you've got a ex-council semi on your hands in Cardiff, the recurring problem when quoting full-house replacement is original Crittall or 70s aluminium replaced with 90s-spec uPVC that's now failing at the gaskets. The false economy of replacing one tired window at a time while the others keep failing is the paired issue you'll usually hear about at the same visit. Our spec here is A+ uPVC or aluminium frames with argon-filled units. Estate roads are wide and van-friendly — we can leave the truck in one spot for the whole day without moving. Bay ceiling drops usually have a beam boxed in above — we route silicone around the boxing edge rather than through it. Rural cottages often have limited off-road parking; the van sits on the road and the crew boards through the front door. Rural access often includes a farm gate and a narrow lane — we check turn-in width at survey. Frame colour on the front elevation is often deed-restricted to white, cream or a heritage green in conservation areas. Single-skin wall means the frame carries no thermal break at the perimeter — sealant bead depth matters more than usual. Original 60s sliding aluminium frames cold-bridge — you can feel a two-degree temperature drop within a foot of the glass in winter. Salt air pits cheap aluminium at the fixing points; genuinely marine-grade powder coating resists. Original front cills are usually blue engineering brick — leave them, drill through them for the frame fixings. External cill drips block with paint over the decades — raking them clean stops water sitting on the frame after install.
Common ex-council semis problems we quote full-house replacement for
- 1Render around the frame perimeter is powdery and needs sealing before the new frame lands.
- 2Hardware on the existing frames is either the developer-original or a mixed bag of repairs.
- 3Original Crittall or 70s aluminium replaced with 90s-spec uPVC that's now failing at the gaskets.
Reveal and install detail
- → Internal reveals are usually plaster-on-brick, forgiving to swap into.
- → External cills are usually concrete — sound and stable, drip clean-out is standard.
Method: front-to-back schedule: front elevation first, sides, then rear; one team on site each day; rubbish cleared nightly.
Guarantee: 10-year product on every frame, 2-year fitting on the whole package, single point of contact.
Local context — Cardiff
- Council
- Cardiff
- Postcodes
- CF10, CF11, CF14, CF23, CF24, CF5
- Main route
- A48
- Nearest town
- Penarth (4 mi)
Neighbourhoods we cover: Cyncoed, Llanishen, Roath, Cathays, Penylan. 10 miles from base, A470 the whole way — Cardiff installs run as smoothly as our home patch.
Who's asking
Right-to-buy long-time owners, and second-owner buyers refurbishing the plot for its garden size.
In Cardiff specifically that reads as city professionals, young families in the suburbs, landlords with HMOs near Cathays Park. The recurring driver for a full-house replacement enquiry is: Owners lifting the property from spec-basic to modern spec — often as part of a wider refurb.
What makes a ex-council semi its own thing
- generous garden front and back — often the largest plots on the street
- hipped concrete-tile roof
- solid front door with an off-centre small window or side pane
- large square window openings, originally metal-frame Crittall or timber casement
What we typically find on survey
- ·The trickle vents are painted shut and the room fugs up within an hour of the kettle going on.
- ·The kitchen window has a defrost line across the low-e coating — argon gas long gone.
- ·Condensation runs down the inside of every north-facing pane between October and March.
- ·The cill drainage caps on a north-facing elevation are frozen in place with layered moss.
- ·Two units have the classic dust ring inside the sealed gap, meaning the perimeter seal has been breached for at least a year.
- ·Silicone at the outer perimeter has hardened, cracked, and lifted at the head — water tracks behind it in heavy rain.
- ·The top hinge on the front door has torn its middle screw out and been left to run on two fixings.
- ·The garden gate side of the property gets no direct sun and the frames there look ten years newer than the fronts.
- ·The multipoint deadbolt still throws but the top hook has stopped catching and no one has noticed for months.
- ·The internal window board has swelled at the sink end from years of splash and is delaminating along the front edge.
- ·The Yale night-latch on top of the multipoint is a sign the resident does not trust the primary lock.
- ·A tenant repair on the bathroom window has used bathroom silicone as the primary bead — it's already gone black.
- ·Original door furniture is 90s brass, tarnished, and no longer matches anything else on the elevation.
- ·The seal at the beading corner has shrunk enough to expose the mitre on the internal white finish.
- ·The multipoint lock still throws but the internal handle has 40° of dead travel before engaging.
- ·The reveal internally has been skimmed over the old plaster edge, hiding a 6mm gap behind the architrave.
- ·Trickle vents on the older units are 4000mm² each — modern regs would spec 8000mm² for the same room.
- ·One patio-door interlock has a bent alignment lug — the door jams shut half of the time.
- ·The glazing spacers between panes carry the visible desiccant snowfall that gives away a blown unit.
- ·A previous decorator's dust sheet was left inside the frame chamber during a repaint and is still there.
- ·Wet-set fixings through the outer frame have rusted and stained the surrounding brick.
- ·The front door has been painted three times without stripping — the paint film is now stopping the door closing at the top.
- ·There is no drip groove on the underside of the cill — water tracks straight back onto the brick face.
- ·The front door threshold weather-bar seal is missing its rubber blade and the metal channel is bent.
Why residents are enquiring right now
- ·The owner is having a kitchen refit next month and wants the patio door in first so the tiler works to a fitted threshold.
- ·There is a downstairs shower being fitted and the bathroom window needs to be swappable before the tiler starts.
- ·The buyer wants a composite door slab that a courier's boot cannot dent when a delivery is fumbled.
- ·The resident works from home and wants the neighbour's dog to stop being the loudest thing on every call.
- ·The buyer wants a genuine Which? Trusted Trader install, not a subcontracted crew running the badge.
- ·The resident has been quoted for solar and does not want the roof work to happen before the windows do.
- ·The homeowner is selling within eighteen months and wants the front elevation to photograph well for the listing.
- ·The resident wants the whole property warm to bare feet on a January morning — the frames are the last variable.
- ·The homeowner wants the composite slab to be paintable without voiding the manufacturer warranty.
- ·The homeowner wants a warranty they can pass on to the next owner without a fee or a form.
- ·A newborn has arrived and the parents want the nursery to hold a stable overnight temperature.
- ·The homeowner has an infrared thermometer and has been point-checking the frames — they want the readings up by ten degrees.
- ·The homeowner has quotes from two national companies and wants a local one to be honest about the same job.
- ·The resident is on a listed street and wants a front door that will pass Article 4 first time.
- ·The homeowner is expecting twins and wants the room-to-room noise transfer down before the arrival.
- ·The resident cycles to work and wants a bike-in-porch design that a survey needs to plan around.
- ·The homeowner wants the front porch to feel enclosed in winter and open in summer.
- ·The resident wants an installer who will honestly say when a repair beats a replacement.
- ·The homeowner has finally accepted the timber back door is beyond another repaint and wants the like-for-like replacement design chosen with them.
- ·The resident wants the kitchen brighter in the mornings without losing the privacy from next door's back garden.
- ·The buyer wants no upsell scripts — a survey, a spec, a figure, and space to think.
- ·The homeowner is planning a garden studio and wants the patio doors to bookend the view when it's finished.
- ·The homeowner is preparing the property for a smart-home installation and wants sensor pockets designed into the reveals.
- ·The buyer wants the sound of the sea audible but the wind noise gone.
How we actually fit it
- ·The old frame comes out in one piece where possible so the reveal detail is not chased through with a demolition bar.
- ·The old frame's fixing holes in the brick are filled and made good before the new outer frame beads up to the reveal.
- ·The internal trim goes on with pin nails through the flange, not straight through the visible face.
- ·The internal architrave is coped rather than mitred where the reveal wall is out of true.
- ·The glass has a factory kite mark visible at handover — not scraped off by a lazy cleaner during the fitting hour.
- ·The client is walked through the finished job with a printed operation card, not a rushed verbal handover.
- ·The composite slab is not cut on site — if it does not fit, a new slab is ordered rather than trimmed.
- ·The client's Wi-Fi router near the door is checked for a signal drop after the composite slab is fitted — a rare case, but worth confirming.
- ·The threshold ramp on an accessible door is set to a maximum 15mm rise, checked with a spirit-level lip.
- ·Trickle vents are drilled through the outer frame with a bespoke jig — not freehand with a spade bit.
- ·The door is closed, locked, and left overnight before final adjustment, so any settlement is captured before sign-off.
- ·The perimeter foam goes in in two passes so the second lift meets the first without a void in the middle.
- ·Cylinders come out of the box, get numbered, and are the last thing fitted, so a lost cylinder does not stall the day.
- ·The frame perimeter sealant is a low-modulus polymer where the substrate is going to move — plain silicone otherwise.
- ·The manufacturer's serial-number label on the new frame is peeled off, not left to yellow on the glass for years.
- ·The cylinder key gets a keyring immediately, so it does not sit unnoticed in a jacket pocket for the day.
- ·The door hinges are set with the correct rise before the frame is finally fixed — retro-adjustment on cheap hinges is limited.
- ·The composite slab is not trimmed on site — if it doesn't fit, a new slab is ordered rather than reduced.
- ·Every silicone bead is tooled with the correct radius spatula, not smoothed with a wet finger only.
- ·The old timber cill under a uPVC swap is treated with a boron preservative before the new frame is set over it.
- ·The internal beads are numbered on removal so they return to the same corner they came from.
- ·The frame is plumbed on two axes before the first fixing goes in — not one axis and then trusted.
- ·The internal make-good caulk is polymer, tooled with a wet finger and then a spatula for a final radius.
- ·The frame is protected with a low-tack film across any face a tool might touch during the fitting hour.
Free full-house replacement survey — ex-council semi, Cardiff
Book a 30-minute visit. We walk every reveal, sample the one consistent foil/RAL across every elevation against the elevation, and email a written figure inside 24 hours.
Summary — full-house replacement on a ex-council semi in Cardiff
Next step for a ex-council semi full-house replacement figure in Cardiff is a 30-minute survey — we walk every opening, check the reveal detail, and write pricing the same day. Original patio door tracks sit direct on the floor slab — we lift, level and re-set on stainless packers. Salt spray in high winds reaches inland elevations at coastal properties — we spec stainless furniture on rear frames too. External cill drips block with paint over the decades — raking them clean stops water sitting on the frame after install. Original front cills are usually blue engineering brick — leave them, drill through them for the frame fixings. Vaulted internal ceilings mean the crew works off a small tower for gable glazing — ground protection sheeting mandatory. Off-street parking makes van access straightforward — we can stage glass in the driveway rather than on the pavement.
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.