Triple glazing 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 triple glazing spec works for every Nelson address — a Trelewis terrace needs different reveals to a newer Quakers Yard estate. We survey first, recommend the right two warm-edge spacers, and quote in writing. 10-year sealed unit guarantee, 10-year frame, 2-year fitting sits behind every job.
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 we build into the quote for you
- Advice on conservation area and planning constraints before ordering
- Astragal or bar options that match the original glazing pattern
- The letterplate brush strip is trimmed to the exact height of the door thickness so it seals without dragging.
- The frame drainage caps face outward and are set proud enough that they don't clog with a season of rainwater.
Completed work on older terraces and character stock where the elevation still reads correctly from the street
Triple glazing across Nelson
- Trelewis
- Treharris
- Llancaiach
- Quakers Yard
- Ffaldau
- Pontlottyn Road
- Wingfield
- Bryngwyn
- Llanfabon
Why Nelson homeowners choose us
- 1Free site survey
- 2Written quote within 24h
- 3Frames built to spec
- 4Single-day install
- 5Snag visit at 1 week
How we build triple glazing
Existing frames stripped, deeper 70mm profile fitted where needed to carry the extra glass weight, hinges upgraded to heavy-duty spec, perimeter sealed with low-modulus silicone.
- • 44mm triple-glazed sealed units
- • two warm-edge spacers
- • argon or krypton gas fill
- • low-E soft-coat inner and outer panes
Guarantee: 10-year sealed unit guarantee, 10-year frame, 2-year fitting.
- Fully exposed elevations on high ground with nothing to break the windOur triple glazing address this with 44mm triple-glazed sealed units.
- Period stone cottages where frame style has to suit the buildingOur triple glazing address this with 44mm triple-glazed sealed units.
- Long single track access to some of the outlying propertiesOur triple glazing address this with 44mm triple-glazed sealed units.
What we typically find on triple glazing surveys around here
- ·The garden gate side of the property gets no direct sun and the frames there look ten years newer than the fronts.
- ·The internal locking cams on the multipoint have been ground down by a mismatched keep pattern.
- ·Handles on the ground-floor windows have been swapped for cheap replacements that no longer match the espag rod.
- ·A cracked pane has been temporarily patched with clear tape and left for six months.
- ·One kitchen unit has a defrost trace across the low-e coating — the argon fill has been gone a while.
- ·One of the sealed units carries the previous installer's phone number etched on the aluminium spacer bar.
- ·Two units have the classic dust ring inside the sealed gap, meaning the perimeter seal has been breached for at least a year.
- ·The top hinge on the front door has torn its middle screw out and been left to run on two fixings.
- ·Every casement in the property opens with a firm tug on the second click — the friction stays are seized.
- ·The composite slab has swelled by 2mm on the hinge stile from years of morning-sun exposure.
- ·The letterplate flap spring has gone slack and the flap now hangs open in a light breeze.
- ·The kitchen window has a defrost line across the low-e coating — argon gas long gone.
- ·The top vent has been kept permanently closed with a wooden shim wedged inside the frame.
- ·The cylinder on the front door still has the builder's key stamp, meaning it has never been changed since handover.
- ·A cat flap has been cut through the lower panel of the back door, weakening the panel and voiding warranty.
- ·The internal glazing bead sits proud of the frame by 1.5mm, so the seal at the top corner has failed first.
Why residents are booking triple glazing right now
- ·The owner is dealing with a partner who works nights and needs the bedroom acoustically watertight before summer.
- ·The owner has an electric car on the drive and wants the front to say the whole property has been kept up.
- ·The owner has tried draught-excluder tape and a chimney balloon and now accepts the frames themselves are the cause.
- ·The resident wants the noise of the school run down and the light from the morning sun up.
- ·The buyer is running a small business from the home office and wants the kerb to say established and settled.
- ·The buyer wants no upsell scripts — a survey, a spec, a figure, and space to think.
- ·The homeowner wants the property EPC to move up a band ahead of a remortgage in six months.
- ·The resident wants the patio door to slide with one finger — not the two-handed heave the current one takes.
- ·The homeowner is selling the property and only wants to replace what visibly holds the survey back.
- ·The buyer wants the whole ground floor to feel more connected to the garden without losing the wall.
- ·The homeowner wants a warranty they can pass on to the next owner without a fee or a form.
- ·The resident is done with condensation-driven mould at the sill line every February.
- ·The buyer wants a genuine Which? Trusted Trader install, not a subcontracted crew running the badge.
- ·The resident is fitting a home cinema in the front room and needs the windows to be a full acoustic upgrade, not a nominal one.
- ·The buyer wants the property to be quieter after 11pm — the street noise is fine, the bass from next door is not.
- ·The homeowner is expecting twins and wants the room-to-room noise transfer down before the arrival.
How our fitters actually do the work
- ·The finished elevation is photographed from the pavement and uploaded to the office job file as sign-off record.
- ·The perimeter tape between frame and reveal is a compressible foam tape, not a plain butyl strip.
- ·The internal make-good caulk is polymer, tooled with a wet finger and then a spatula for a final radius.
- ·The friction stay on a new casement is set to the client's preferred restraint at handover — 45°, 90°, or fully open.
- ·The old debris leaves in a single tidy load — not skip visits three days apart.
- ·The dustsheet inside the room is a heavy canvas taped to the skirting, not a light plastic left loose.
- ·The frame square is checked at the diagonals before any glass goes in — a square frame stays square.
- ·The client is left with the manufacturer's paperwork in a labelled envelope, not a folded receipt tucked inside a drawer.
- ·The old keys are collected and destroyed, not left in a bag on the drive.
- ·Door thresholds are set with a spirit level along their full length and then re-checked with a straight edge.
- ·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 bay assembly is squared with a laser diagonal, not a tape measure and eye.
- ·The frame reinforcing steel is confirmed inside the top rail before the transom fixing is chosen.
- ·Cavity closers get inserted where the old frame's cavity closer has failed — not omitted because it is unseen work.
- ·The reveals are photographed on arrival so any pre-existing damage is on record before the crew touches them.
- ·The perimeter foam goes in in two passes so the second lift meets the first without a void in the middle.
FAQs — triple glazing in Nelson
Do you fit triple glazing 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 triple glazing suit the older village terraces around the old pond and square common around Nelson?+
On hillside NP4 and CF83 addresses the wind chill drops surface temperatures — triple glazing lifts the internal pane 3–5°C over double. We've installed dozens in Trelewis and Treharris alone.
Why replace the whole set rather than one-by-one in a Nelson home?+
Because traffic noise from the A470 or A469 that double glazing only partly muffles, and cold radiating off the glass at night 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.
Can triple glazing handle fully exposed elevations on high ground with nothing to break the wind?+
Directly, yes — sealed units rated 30+ years before argon migration becomes measurable. 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.
How do you reach jobs in Nelson from your base?+
A short hop off the A470 at Nelson, and we allow extra time for the narrow lanes out toward Llanfabon — typically a short run via A472.
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.
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.
Get a fixed triple glazing quote for Nelson this week
Quote in writing within 24 hours. Most CF46 jobs are booked in within 3 weeks of acceptance.
Request my quoteTalk through a sympathetic replacement in Nelson
Send a photograph of the elevation and we will suggest the profile, colour and bar layout that keeps the character intact. Triple glazing for Nelson and the Caerphilly County Borough Council area, 1 day per elevation with the heavier units, or 2–3 for a full house, with a written price inside 24 hours.
Summary — triple glazing in Nelson
What you're paying for: 44mm triple-glazed sealed units, 10-year sealed unit guarantee, 10-year frame, 2-year fitting, 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 triple glazing specifically: traffic noise from the A470 or A469 that double glazing only partly muffles, and cold radiating off the glass at night, 1 day per elevation with the heavier units, or 2–3 for a full house, 10-year sealed unit guarantee, 10-year frame, 2-year fitting.
Faults we fix before recommending triple glazing
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.
Asymmetric glass thickness and a good frame seal cut traffic noise; simply adding a third identical pane often doesn't.
Most of the heat leaves through the roof and the frames, so that's where the money should go first.
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.