Gwynedd · Wales
uPVC window & door repair in Trefor, Gwynedd
Damaged window, door or sill in Trefor? We repair it in place, mix the colour on the day and back it with a one-year guarantee.
- Repairs from £95
- Burns on sills
- Scratches from ladders and furniture
About our uPVC repair in Trefor
We fill and refinish the damage to match the frame, woodgrain finishes included. Builders and developers use us for snagging repairs too. Common call-outs are for damage during building work and holes from removed fittings and alarms, on doors & door panels, conservatory frames and white uPVC.
Peace of mind is built in: each job carries a one-year guarantee, and we explain what it covers before booking. Clean with warm soapy water and a soft cloth. Avoid solvents and abrasive cleaners.
- Location
- Trefor (LL54)
- Area hub
- Gwynedd
- Guarantee
- One year on every repair
- Price
- From £95. Free and fixed, from your photos
- Telephone
- 0345 017 0787
- Updated
- 23 October 2026
How we price uPVC repair
Prices start from £95. Prices are worked out job by job. What matters most is:
- The size and number of damaged areas
- What kind of damage it is
- Where the damage is and how we get to it
- The material and finish
Most people are surprised how affordable a repair is, especially compared with replacing and refitting. Send pictures and we’ll give you the exact figure.
Send pictures for a quote
It only takes a minute to photograph the damage, and it saves a visit. Try to send:
- Where you are, by postcode
- What it’s made of, if you know
- Daylight if possible, and no flash reflection
- Something in shot to show the size
A quote takes minutes to ask for: photograph the damage, then the whole window, door or sill, add your postcode and send them over. What comes back is a fixed price, not a guess.
Towns and villages near Trefor
More services for Trefor
Repairing versus replacing in Trefor
A new window, door or sill is a much bigger job, and it may not match the rest after years of weathering. A repair keeps the original. Repairs from £95, with every job priced individually. We charge the same wherever you are, so there’s no premium for Trefor. What changes the price is the job itself: the material, the amount of damage and how many items.
Why choose Surface Doctor in Trefor
- A year’s guarantee on all work
- Rooms protected and left tidy
- One price list for the entire UK
- Honest advice, even when it means no job
Take a look at our pricing.
What we do, step by step
When we visit, the technician arrives at the agreed time, protects the room with dust sheets and masking and gets started. The job usually takes a few hours. We clean up when we are done and let you know when you can use it again.
- First the frame or panel is cleaned.
- Scratches, chips and holes are filled.
- The repair is sanded smooth.
- The finish is colour-matched, woodgrain included.
- We blend the repair into the surrounding surface.
Preparing for the visit
- Let the surface dry out before the visit
- Tell us if there are stairs or a lift
- Mention any parking restrictions or tricky access
Ask for a price
To get a price, send two or three pictures through our quote form or call us. We will tell you honestly if a repair is the right fix.
Advice
What we cannot put right
A repair isn’t always the answer, and we’d rather say so up front. We can’t fix:
- Failed or misted double glazing units
- Broken locks, hinges or mechanisms
- Frames that are warped or out of square
If in doubt, send pictures and we’ll say what we think.
What we work on
- Doors & door panels
- Coloured and woodgrain uPVC
- Window frames & sills
- Conservatory frames
- White uPVC
DIY repairs versus a professional job
It’s natural to want to try a repair yourself. The risk is that a kit repair hides the damage for a while, then fails, and then the old filler has to be removed first.
What a professional repair adds is preparation, colour matching and finishing. We clean and key the area properly, mix the colour to your surface and finish it to the same sheen, and the work is guaranteed.
Questions from Trefor
Is my repair covered?
Yes, for a year. If anything goes wrong with the repair within the year, we return to fix it.
Is it safe with children and pets around?
On the day, the room should be kept clear of pets and children, mainly so nothing gets touched before it has cured.
Do you cover the entire of Gwynedd?
All of Gwynedd, and the rest of the UK. There’s no extra charge for travel.
It’s been repaired before. Can you still fix it?
Generally, yes. We remove the old repair before doing a new one, so mention it when you send photos.
Do you work for landlords and businesses?
Yes. We work for landlords, agents, builders and businesses as well as homeowners across Gwynedd.
Will there be a smell?
It depends on the job, but frequently a little. Open windows and an extractor fan help, and it soon fades.
Are you a vetted contractor?
Yes, including CHAS, Constructionline and SafeContractor. The full list is on our accreditations page.
Can a burnt window sill be fixed?
Yes. The burn is filled and refinished to match.
What we are called out for in Trefor
uPVC is tough but not indestructible: ladders, tools and building work scratch and chip it, candles and cigarettes mark sills, and removed fittings leave holes.
Most people contact us after spotting something like this:
- Damage during building work
- Scratches from ladders and furniture
- Burns on sills
- Holes from removed fittings and alarms
Before booking anyone
- How long it needs to cure
- What happens if the damage is worse than the photos show
- Whether the price is fixed and includes VAT
- Whether the colour is mixed to match
About Trefor
Trefor is about 20 miles south-west of Bangor, in Gwynedd. Across the LL54 area, we carry out the work at your property. Trefor is one of 165 towns and villages in Gwynedd we cover. Our nearest city page is Liverpool, about 68 miles away.
We work across LL54 and the streets around it. You will find streets such as Croes-Higol Road, Stad Llywynaethnen and Maes Gwydir, all of which we cover. Nearby, we also work in Llanaelhaearn (2 miles south-east), Llithfaen (3 miles south-west), Clynnog Fawr (3 miles north-east), Pistyll (4 miles south-west) and Rhos-fawr (5 miles south). Further out, we also cover Caernarfon (12 miles north-east), Pwllheli (7 miles south), Llanbeblig (12 miles north-east), Porthmadog (13 miles east), Morfa Nefyn (7 miles south-west) and Llanberis (15 miles north-east).
Around Trefor
Our clients here include homes close to St George's Church. Other landmarks nearby include Bryn Beryl hospital (5.8 miles south) and Vortigern Castle (1.8 miles south-west). Green spaces nearby include Garn Fôr and Llyn Glasfryn.
Landlords, agents and businesses in Trefor
Rented homes see more wear and tear, and replacing things at every changeover adds up. Repairing between tenants keeps the property presentable for less.
We work for landlords, letting agents and housing providers in Trefor as well as homeowners. Repairing between tenancies keeps void periods short, and it normally costs far less than a refit.
About our accreditations · Every repair comes with a one-year guarantee.
