Full-house replacement fitted across Nelson & CF46
A village on high open ground where wind loading matters more than in the sheltered valley floors nearby. That mix is why no single full-house replacement spec works for every Nelson address — a Trelewis terrace needs different reveals to a newer Quakers Yard estate. We survey first, recommend the right argon-filled units, and quote in writing. 10-year product on every frame, 2-year fitting on the whole package, single point of contact sits behind every job.
Nelson at a glance
- Council
- Caerphilly
- Postcodes
- CF46
- Main route
- A472
- Nearest town
- Ystrad Mynach (4 mi)
A village on high open ground where wind loading matters more than in the sheltered valley floors nearby.
Owners of older and character property
Written for owners of older and character property
On older houses the opening is never square and the reveal is never standard. This page covers how we survey and pack those openings rather than forcing a stock size into them.
What this buyer actually needs from us
- Slim sightlines so the glass area is not visibly reduced
- Heritage colours and traditional hardware rather than stock white and chrome
- The internal cill is scribed with a coping saw against the reveal plaster, not butted flush with a caulk joint.
- The internal cill is scribed to the reveal, not just butted and caulked over the gap.
Completed work on older terraces and character stock where the elevation still reads correctly from the street
Full-house replacement across Nelson
- Trelewis
- Treharris
- Llancaiach
- Quakers Yard
- Ffaldau
- Pontlottyn Road
- Wingfield
- Bryngwyn
- Llanfabon
- Fully exposed elevations on high ground with nothing to break the windOur full-house replacement address this with A+ uPVC or aluminium frames.
- Period stone cottages where frame style has to suit the buildingOur full-house replacement address this with A+ uPVC or aluminium frames.
- Long single track access to some of the outlying propertiesOur full-house replacement address this with A+ uPVC or aluminium frames.
Why Nelson homeowners choose us
What we typically find on full-house replacement surveys around here
- ·A previous cylinder swap left the escutcheon plate rotating freely — a snap risk that nobody logged.
- ·Original security bolts on the ground floor sashes are seized in place and no longer key-lockable.
- ·The bottom hinge on the front door has torn its top screw fixing free of the frame.
- ·The gap under the front door has been carpet-strip filled from inside — the exterior weather bar is missing.
- ·The frame reinforcement steel inside the outer frame has begun to rust and stain the internal white finish.
- ·The old timber back door has a live rot pocket at the bottom hinge that reads soft to a screwdriver tip.
- ·The multipoint gearbox on the front door still throws, but the hooks miss the keeps by 2mm on the middle throw.
- ·A previous fitter drilled through the outer frame chamber for the trickle vent — never fully sealed the drilling.
- ·The old aluminium sliding door has a cracked head roller that pulls the door out of parallel with the frame.
- ·The internal beads pop out with a chisel and a tap, but the external glazing gasket is bonded solidly to the frame.
- ·The bay-window front elevation has a visible smile — the middle mullion has sagged and taken the head with it.
- ·The gasket at the vent has perished and pulled away from its channel in two-inch sections.
- ·One kitchen unit has a defrost trace across the low-e coating — the argon fill has been gone a while.
- ·The bottom rail on the sash has taken years of rain runoff and swollen enough to bind on the frame.
- ·The seal at the beading corner has shrunk enough to expose the mitre on the internal white finish.
- ·One sash sits proud of the frame by 2mm along the top rail — a factory manufacturing tolerance that never got addressed.
Why residents are booking full-house replacement right now
- ·The buyer has just moved in and is fixing everything the vendor's homebuyer report flagged, in priority order.
- ·The buyer wants the frames to still look right in twenty years, not just at handover.
- ·The resident wants the crew to be locals who won't disappear if a warranty call needs answering in year eight.
- ·The buyer wants a specific coloured composite front door because they saw it three doors down and it made the street.
- ·The buyer wants the sound of the sea audible but the wind noise gone.
- ·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 wife wants the noise from the trunk road down; the husband wants the heating bill down; both are on the enquiry.
- ·The resident has already had one failed installation and wants to know exactly how this one will differ.
- ·The buyer wants a written commitment on the sealant colour and the trim colour before any deposit changes hands.
- ·The resident wants the front door lock to be re-keyable if a set of keys goes missing in year three.
- ·The resident wants an installer who will honestly say when a repair beats a replacement.
- ·The homeowner wants matt black hardware because everything inside the house is matt black — no chrome to argue with.
- ·The resident wants the patio door to slide with one finger — not the two-handed heave the current one takes.
- ·The buyer wants the whole job done by one team who own the outcome — not designed in one place and fitted in another.
- ·The resident is a keen gardener and wants a patio door that opens as fully as possible into the garden.
- ·The buyer wants the property to be quieter after 11pm — the street noise is fine, the bass from next door is not.
How our fitters actually do the work
- ·The glazing bead is tapped in with a rubber mallet, not a metal claw — the profile marks otherwise.
- ·Cavity closers get inserted where the old frame's cavity closer has failed — not omitted because it is unseen work.
- ·The crew photographs the finished elevation from the street and shares it with the office as the sign-off record.
- ·The fitting van is stocked with the specific spare parts likely to be needed on the day — not a return trip on a missing hinge.
- ·The frame square is checked at the diagonals before any glass goes in — a square frame stays square.
- ·The screws through the outer frame go into pilot-drilled masonry, not driven with hammer action alone.
- ·The internal make-good caulk is polymer, tooled with a wet finger and then a spatula for a final radius.
- ·The multipoint hooks are lubed with the manufacturer's grease, not household oil that dries and gums.
- ·The frame perimeter sealant is a low-modulus polymer where the substrate is going to move — plain silicone otherwise.
- ·The composite door slab is inspected under torchlight for delamination before the hinges are fitted.
- ·The letterplate brush strip is trimmed to the exact height of the door thickness so it seals without dragging.
- ·The perimeter foam goes in in two passes so the second lift meets the first without a void in the middle.
- ·The wall around the frame is Hoovered before the client sees the room again — brick dust ages a first impression.
- ·The lock cylinder is measured to sit flush with the escutcheon plate — a proud cylinder is a snap risk.
- ·The internal reveal is masked before any silicone runs, so the finished bead is a clean line against the plaster.
- ·The lead fitter photographs the reveal condition before the old frame comes out and shares those photos with the office.
FAQs — full-house replacement in Nelson
Why replace the whole set rather than one-by-one in a Nelson home?+
Because the false economy of replacing one tired window at a time while the others keep failing rarely stays isolated — once one unit goes, the rest follow within a few years. Doing it once means matching frames across the elevation and one trip for our team into CF46.
How long does a full-house replacement install take in a Nelson property?+
Typically 2–4 days depending on count, with a final snag visit a week later. Most of the village terraces around the old pond and square we see in Nelson fit our standard schedule with no surprises.
Can full-house replacement handle fully exposed elevations on high ground with nothing to break the wind?+
Directly, yes — whole property reset to a-rated thermal performance for a 20-year horizon. That matters in Nelson where fully exposed elevations on high ground with nothing to break the wind is the single most common reason people call us.
What guarantee do I get when you fit full-house replacement in Nelson?+
10-year product on every frame, 2-year fitting on the whole package, single point of contact. We're insured to work right across Caerphilly County Borough Council's area, and you have one named contact from quote to snag.
Do you fit full-house replacement across all of Nelson?+
Yes — we work across every CF46 postcode, from Trelewis through to Treharris, and out as far as Llancaiach. A short hop off the A470 at Nelson, and we allow extra time for the narrow lanes out toward Llanfabon.
Will modern frames look wrong on an older house?+
They can, if the profile is chosen badly. Flush sash sits back into the reveal and keeps the sightline slim, which is why we specify it on older elevations rather than standard chamfered casements.
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.
Get a fixed full-house replacement quote for Nelson this week
Quote in writing within 24 hours. Most CF46 jobs are booked in within 3 weeks of acceptance.
Request my quoteSee heritage options in person in Nelson
Flush sash profiles, heritage colour range and traditional hardware, priced against the standard range so you can see the difference. Full-house replacement for Nelson and the Caerphilly County Borough Council area, typically 2–4 days depending on count, with a final snag visit a week later, with a written price inside 24 hours.
Summary — full-house replacement in Nelson
What you're paying for: A+ uPVC or aluminium frames, 10-year product on every frame, 2-year fitting on the whole package, single point of contact, and a team that's spent years in CF46 rather than passing through it. No subbies, no surprise day-of charges, and a short hop off the A470 at Nelson, and we allow extra time for the narrow lanes out toward Llanfabon. On full-house replacement specifically: the false economy of replacing one tired window at a time while the others keep failing, typically 2–4 days depending on count, with a final snag visit a week later, 10-year product on every frame, 2-year fitting on the whole package, single point of contact.
Faults we fix before recommending full-house replacement
A draught is usually a compression problem — gasket, hinge or seal — long before it's a reason to replace the window.
Rot in the bottom rail is repairable; rot that has reached the joints and the cill usually isn't worth chasing.
Yellowing is cosmetic and treatable; splits at the welded corners are structural and aren't.
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.