Ystrad Mynach composite doors — survey, supply & install
Ystrad Mynach sits 5 miles from Caerphilly and 4 from Bargoed, and that's the patch this page covers. The composite front doors we fit here use 48mm solid composite slab and GRP weatherproof skin, which is what holds up against north facing rear elevations that stay cold and attract condensation. Ten minutes north of Caerphilly on the A469, so we can survey in the morning and quote the same afternoon, so site visits and follow-ups don't drag.
10/10 on Checkatrade across Ystrad Mynach and Caerphilly
Over 50 verified reviews from Caerphilly homeowners. 10-year product guarantee with a 2-year fitting guarantee on top.
- Draughty original 1960s semi glazing on exposed corner plotsOur composite doors address this with 48mm solid composite slab.
- Rail noise along the Rhymney line through the centre of townOur composite doors address this with 48mm solid composite slab.
- North facing rear elevations that stay cold and attract condensationOur composite doors address this with 48mm solid composite slab.
Why Ystrad Mynach homeowners choose us
- homeowners
- landlords needing PAS24-rated entry
Ystrad Mynach at a glance
- Council
- Caerphilly
- Postcodes
- CF82
- Main route
- A472
- Nearest town
- Caerphilly (5 mi)
A commuter hub at a valley crossroads, with more post war semis than terraces and a lot of straight swap window work.
Recent work near Ystrad Mynach
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.
How we build composite doors
Old frame stripped on the day, new outer frame fitted plumb to the brick reveal, threshold sealed with EPDM and silicone.
- • 48mm solid composite slab
- • GRP weatherproof skin
- • multi-point Yale or ABS lock
- • PAS24 reinforced cylinder
Guarantee: 10-year product guarantee with a 2-year fitting guarantee on top.
Owner occupiers replacing one door or one window
Buying composite doors as owner occupiers replacing one door or one window
Written for people who need one opening sorted rather than a full refit. The honest question at this size of job is repair or replace, and this page answers it before asking you to book anything.
Where this job stands or falls
- A new unit that matches the frames already on the property
- A fixed price for one opening with no minimum order pressure
- The friction stay on a new casement is set to the client's preferred restraint at handover — 45°, 90°, or fully open.
- The door slab gets a full inspection before hanging — dents, delamination, edge integrity, all noted before fixings go through.
The same ten year product guarantee applies whether you buy one unit or twenty
What we typically find on composite doors surveys around here
- ·The front door threshold weather-bar seal is missing its rubber blade and the metal channel is bent.
- ·The Yale night-latch on top of the multipoint is a sign the resident does not trust the primary lock.
- ·The old timber sub-frame under the current uPVC unit is still in place and is soft at the bottom left corner.
- ·The frame reinforcement steel inside the outer frame has begun to rust and stain the internal white finish.
- ·The letterbox opening is not draught-proofed at all — a candle held two feet away flickers in a light wind.
- ·Original security bolts on the ground floor sashes are seized in place and no longer key-lockable.
- ·A previous decorator's dust sheet was left inside the frame chamber during a repaint and is still there.
- ·There is no drip groove on the underside of the cill — water tracks straight back onto the brick face.
- ·Trickle vents on the older units are 4000mm² each — modern regs would spec 8000mm² for the same room.
- ·Every kitchen window handle has been replaced twice in ten years — a sign the espag is going, not just the handle.
- ·A weep vent that was factory-drilled has been over-painted three times and no longer clears water from the chamber.
- ·The old timber back door has a live rot pocket at the bottom hinge that reads soft to a screwdriver tip.
- ·The friction hinge on a bedroom window has one detent — it either opens fully or slams shut on any breeze.
- ·The manufacturer's kite mark on the corner of the glass is late-90s vintage, which explains the thermal performance.
- ·The trickle-vent screw covers are missing and the internal chamber has filled with cobweb.
- ·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 composite doors right now
- ·The buyer wants a genuine step-up in security, not a marketing claim — PAS24 tested, not PAS24 marketed.
- ·The owner wants the whole property refurbished for a big family gathering nine weeks out — everything sequenced tightly.
- ·The resident works from home and wants the neighbour's dog to stop being the loudest thing on every call.
- ·The owner wants the property to look ten years newer without needing an extension.
- ·The owner just remortgaged and wants the money to be visible on the elevation for the next valuation.
- ·The homeowner wants a five-star Checkatrade installer at the door, not a subcontracted crew nobody has vetted.
- ·The owner wants a threshold that does not require a step for a mobility scooter to clear.
- ·The buyer wants the frames branded with the manufacturer's paperwork stapled to the frame chamber for the next owner.
- ·The owner wants the master bedroom quiet enough for a night-shift partner to sleep past 11am.
- ·The buyer wants a full set of the same colour across every elevation, not the current mixed collection.
- ·The buyer is buying the property specifically for the garden and wants a bi-fold that opens the whole rear elevation.
- ·The homeowner is preparing the property for a smart-home installation and wants sensor pockets designed into the reveals.
- ·The homeowner wants the composite front door to survive a decade of coastal salt without going chalky.
- ·The resident wants the crew to remove and re-hang the internal curtains as part of the job, not leave that step to them.
- ·The homeowner wants the back door to be a family door — kids in and out, and no one having to slam it to lock.
- ·The buyer wants no upsell scripts — a survey, a spec, a figure, and space to think.
How our fitters actually do the work
- ·The old keys are collected and destroyed, not left in a bag on the drive.
- ·The head of the frame is packed dry before the sides are fixed, so the frame does not distort during installation.
- ·The frame is protected with a low-tack film across any face a tool might touch during the fitting hour.
- ·The old frame comes out in one piece where possible so the reveal detail is not chased through with a demolition bar.
- ·The lock cylinder is measured to sit flush with the escutcheon plate — a proud cylinder is a snap risk.
- ·The client's paint colour on the internal reveal is patched with matching paint the crew brings, not left for someone else.
- ·The concrete cill under the frame is checked for cracks; a hairline gets a slurry fix before the frame is set.
- ·Any dropped hinges on the existing door are noted before the swap so the new frame is set for the correct drop.
- ·The lead fitter leaves a handwritten note of anything the client should watch in the first month, not a printed generic checklist.
- ·The site tidy happens twice per day, not once at the end, so brick dust doesn't track through the house.
- ·The screws through the outer frame go into pilot-drilled masonry, not driven with hammer action alone.
- ·The letterplate brush strip is trimmed to the exact height of the door thickness so it seals without dragging.
- ·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.
- ·Trickle vents are drilled through the outer frame with a bespoke jig — not freehand with a spade bit.
- ·The gasket at the corner mitre is butt-jointed with a fresh knife cut, not stretched and hoped.
- ·The threshold ramp on an accessible door is set to a maximum 15mm rise and confirmed with a spirit-level lip.
FAQs — composite doors in Ystrad Mynach
What guarantee do I get when you fit composite doors in Ystrad Mynach?+
10-year product guarantee with a 2-year fitting guarantee on top. 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 cover Caerphilly and Bargoed as well?+
Yes — Caerphilly is roughly 5 miles from Ystrad Mynach, Bargoed about 4. Same team, same prices, same guarantee.
Why replace the whole set rather than one-by-one in a Ystrad Mynach home?+
Because old timber and rotten 90s uPVC front doors that leak heat, jam in winter and fail break-in standards 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 CF82.
Do you do commercial composite doors for sites near Tredomen Business Park?+
Yes. We've worked across Tredomen Business Park and the Penallta industrial units, supplying the same 48mm solid composite slab build we use on residential. Commercial quotes include site access notes and out-of-hours options.
Do you fit composite doors across all of Ystrad Mynach?+
Yes — we work across every CF82 postcode, from Hengoed through to Penpedairheol, and out as far as Maesycwmmer. Ten minutes north of Caerphilly on the A469, so we can survey in the morning and quote the same afternoon.
Do you take on single window or single door jobs?+
Yes, and there is no minimum order. A single opening is usually a half day, including removing the old frame and making the reveal good inside and out.
Is it cheaper to repair the existing frame?+
Often, yes. Hinges, handles, gearboxes and single sealed units can all be replaced without touching the frame. We quote the repair first when the frame itself is sound.
Get one opening priced in Ystrad Mynach
No minimum order and no pressure to do the rest of the house. A fixed written price for the single unit you need. Composite doors for Ystrad Mynach and the Caerphilly County Borough Council area, fitted in a single day, usually 4–6 hours, with a written price inside 24 hours.
Summary — composite doors in Ystrad Mynach
From Hengoed to Maesycwmmer, our patch is small enough that we'll see your finished composite doors install ten times a year. That keeps us honest around Ystrad Mynach. Get in touch when you're ready. On composite doors specifically: old timber and rotten 90s uPVC front doors that leak heat, jam in winter and fail break-in standards, fitted in a single day, usually 4–6 hours, 10-year product guarantee with a 2-year fitting guarantee on top.
Faults we fix before recommending composite doors
A door that needs lifting, shoving or a second attempt to lock is warning you before the gearbox fails completely.
A composite slab that catches on the frame has almost always moved at the hinges, and hinges are adjustable in three planes.
Most break-ins through glazed openings exploit the cylinder or the keeps, both of which are upgradeable in an afternoon.
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.