Caerphilly · Wales
uPVC window & door repair in Trethomas, Caerphilly
Fixed-price uPVC repair in Trethomas and the surrounding area, done in a single visit in most cases and guaranteed for a year.
- Repairs from £95
- Scratches from ladders and furniture
- Holes from removed fittings and alarms
DIY kit or professional repair?
The difference between a kit and a professional repair is mostly in the preparation and colour. We prepare the area properly, mix the colour on site and polish the finish to match, and the work is guaranteed.
If you’re set on a kit, follow its instructions closely, and don’t use it until it has fully cured. If it doesn’t work out, we can still repair it properly.
How we handle uPVC repair in Trethomas
We also do snagging repairs for builders. We fill and refinish the damage so it blends into the frame, including woodgrain finishes. We regularly repair conservatory frames, doors & door panels and white uPVC, and people most frequently call us about damage during building work and chips and dents.
The work is guaranteed for twelve months. If something isn’t right in that time, we come back and put it right. Clean with warm soapy water and a soft cloth. Avoid solvents and abrasive cleaners.
- Where
- Trethomas (CF83)
- Area hub
- Caerphilly
- Guarantee
- 12 months on all our work
- Quotes
- From £95. Fixed and free, based on pictures
- Call
- 0345 017 0787
- Page updated
- 23 October 2026
Should you replace it?
A new window, door or sill costs far more, and it may not match the rest after years of weathering. A repair keeps the original. Repairs from £95, with every job priced individually. The price reflects the work involved, not your postcode. The full price is agreed before booking, with no extras added later.
Why Trethomas clients choose us
- Repair technicians who travel to you, UK-wide
- CHAS, Constructionline and SafeContractor accredited
- One-year guarantee on every repair
- A fixed quote before you book
Take a look at our prices page.
What we cannot put right
A repair is not always the answer, and we would rather say so up front. Repairs won’t solve:
- Failed or misted double glazing units
- Broken locks, hinges or mechanisms
- Frames that are warped or out of square
Send us photos and we’ll tell you honestly before booking.
What we work on
- Window frames & sills
- Doors & door panels
- Coloured and woodgrain uPVC
- Conservatory frames
- White uPVC
Trethomas: your questions answered
Can you do more than one item on the same visit?
Of course, and it normally saves money. Just add the extra items to your photos and you will get one combined price.
Will the price change on the day?
It’s rare, but if it happens we talk to you first. The price only changes if you agree.
Can you repair a burn on a uPVC sill?
Yes. We fill and refinish the burnt area to match.
What areas do you cover?
The whole UK, including all of Caerphilly. Send your postcode with your pictures and we’ll offer you dates.
Is a repair better than a new one?
Typically, if the item is otherwise sound. Repairing avoids the cost and disruption of replacing. If replacing would be better, we will say so.
Do I have to be there?
Yes. We need access to the room while we work, at a time we agree with you.
Are there extra charges for Trethomas?
There is no separate call-out charge. Your fixed price includes everything.
How quickly can you book me in?
It depends on the time of year and where you are. We’ll offer you dates when we send your quote.
Work for landlords and builders
Hotels, guest houses and holiday lets cannot afford rooms out of action for long, so most of our work is done in a single visit. We can work around your bookings.
Builders use us to fix snagging damage before handover, so there is no need to replace a damaged item at the last minute. We can visit several plots in one trip to keep costs down.
Places near Trethomas
Also in Trethomas
Where we work around Trethomas
Trethomas is about 2 miles east of Caerphilly, in Caerphilly. Jobs in Trethomas are booked in like any other job: a fixed price from your pictures, and a technician at your door on the day. Our technicians cover all 94 towns and villages in Caerphilly, from the larger towns to small villages.
Postcode districts we cover here: CF83. That includes homes on Heol yr Ysgol, Ashgrove and The Avenue and the roads around them. Other places close to Trethomas include Craig-y-Rhacca (1 mile east), Graig-y-Rhacca (1 mile east), Garth Place (1 mile south-east), Waterloo (1 mile east) and Machen (2 miles east). Larger places within reach include Blackwood (5 miles north), Risca (4 miles east), Ystrad Mynach (4 miles north-west), Cefn Fforest (5 miles north), Pontllanfraith (4 miles north) and Trecceln (6 miles north).
What’s near Trethomas
Our customers here include homes close to Church Of St Barrwg, Ty Yn y Pwll Inn and Bedwas High School. For rail, the closest station is Energlyn & Churchill Park station, about 2 miles west of the centre. Nearby you’ll also find Risca Industrial History Museum (3.8 miles east) and Rhyd-y-gwern (1.9 miles east). For a walk, there’s Mynydd y Grug.
Signs you need uPVC repair in Trethomas
uPVC is hard-wearing, but it does get damaged: ladders and building work leave scratches and chips, candles and cigarettes mark sills, and old fittings leave holes.
Get in touch if you’ve noticed:
- Holes from removed fittings and alarms
- Damage during building work
- Chips and dents
- Scratches from ladders and furniture
What to look for in a quote
- What happens if the damage is worse than the photos show
- Aftercare advice
- How the room is protected while they work
- Whether the price is fixed and includes VAT
How the visit works
We begin by going over the job with you, so you know exactly what we are doing. After that, protection goes down around the work area and we start. You can expect it to take a morning or an afternoon.
- We clean the frame or panel.
- Scratches, chips and holes are filled.
- We sand the repair smooth.
- The finish is colour-matched, woodgrain included.
- The repair is blended into the surface around it.
Preparing for the visit
- Let us know which floor the room is on
- Let us know if it has been repaired before
- Plan for the room to be out of bounds to pets and children
Ask for a price
If you’re in Trethomas and want a price, photos are the quickest way: a close-up, a wider shot and your postcode. You will get a fixed quote with dates to choose from.
Related advice
How we price uPVC repair
Prices start from £95. Prices are worked out job by job. What matters most is:
- How many items we do on one visit
- Any earlier repairs that need removing first
- How many areas need work
- The colour and finish to match
We charge the same wherever you are, so there’s no premium for Trethomas. What changes the price is the job itself: the material, the amount of damage and how many items.
Send pictures for a quote
Photographing the damage takes a minute, and it saves a visit. Try to send:
- Any earlier repairs or coatings
- Good light, ideally daylight, without flash glare
- A wider photo showing the entire window, door or sill
- Any details about the material
We price from photos so you do not have to wait in for a survey. Use the quote form, or ring 0345 017 0787 to talk it through.
About our accreditations · Every repair comes with a one-year guarantee.
