Replacement windows in South Wales
A free survey, a clear written quote and no hard sell. Made to measure and fitted by our own team, with no subcontractors.
Why choose Sureseal
4.9 from 276 Google reviews
Real customers, real reviews on Google.
10-year window guarantee
FENSA certificate, fully guaranteed and insured.
Our own local team
Surveyed and fitted by our own installers, never subcontractors. Based in Swansea.
No hard sell
One free home visit, an honest recommendation and a written quote, then the decision is yours.
Got a quote from one of the big national window firms? We regularly beat them on price, and on the quality of the fitting.Local homeowners switch to us from the national names all the time. Get your price and compare.
Your free quote
Your free replacement windows quote.
Tell us a little about your home and we will call to talk it through and arrange your free survey.
- Quick and free. Just your name, number and postcode.
- A friendly chat, not a sales pitch. We’ll call to talk through your project and answer your questions, then arrange your free home survey.
- Prefer to ring us? Call free on 0800 233 5576, Monday to Friday 9am to 5pm.
Get your free, no-obligation quote
Leave your name, number and postcode and one of our local team will call you to arrange your free home survey.
★★★★★“Extremely efficient, professional and helpful company.”Sarah Thomas, Google review · 4.9 from 276 reviews
Real homes, real customers
See the work, near you
Homeowners in Aberaeron, Swansea and Newport show you round their new windows and doors.
Sash windows for a farmhouse
uPVC sliding sash windows and a composite rear door for a century-old stone farmhouse.
Whole-home replacement
New uPVC windows, including tilt and turn, and replacement doors throughout.
Bay window upgrade
Replacement uPVC windows through a terraced home, including both bay windows.
What customers say
276 Google reviews. 4.9 out of 5.
★★★★★“Got all windows and doors installed professionally, as agreed and on time. Very good quality product professionally installed.”
★★★★★“Good workmanship and clean and tidy, a pleasure to have in our home.”
★★★★★“Extremely efficient, professional and helpful company.”
Styles & prices
From everyday casements to heritage sash
Whether it's a few windows on a semi or a full set of sash windows for a period home, we have a range to match. We bring samples to your visit so you can see and feel each one.
Windows
Classic casement
Lifestyle uPVC casements with clean lines. The reliable all-rounder for most homes.
Brochure (PDF) →Sculptured casement
Halo Rustique: softer, rounded profiles that echo traditional putty lines on cottages and terraces.
Brochure (PDF) →Flush sash
Halo flush sash: sashes sit level with the frame for the look of timber, without the painting.
Brochure (PDF) →Heritage sliding sash
Slim sightlines, astragal bars and run-through horns for period and conservation-area homes.
Doors
uPVC front & back doors
Hurst uPVC door panels with multi-point locking and weatherproof thresholds.
Brochure (PDF) →Hallmark composite door
Timber-look skin over an insulated core, with PAS 24-ready security options.
Brochure (PDF) →French & patio doors
Light-filled French pairs or smooth sliding patio doors to open up the garden.
Aluminium bi-folds
Slim, thermally broken frames, 2 to 7 panels, folding back to open a whole wall.
Every quote includes
- Survey and measuring by our own team
- Removal of your old frames, sealed and tidied after fitting
- Fitting by our own installers, never subcontractors
- FENSA certificate and a 10-year window guarantee, fully guaranteed and insured
Questions
Your questions, answered
What happens after I leave my details?
One of our team will give you a call to talk through your project and answer any questions. If you’d like an exact price, we can then arrange a free home visit at a time that suits you. Or call us free on 0800 233 5576, Monday to Friday 9am to 5pm.
Is the quote fixed?
Yes. After we measure every opening at your free home visit, you get a fixed, itemised quote, valid for 28 days.
When can my windows and doors be fitted?
Usually 6–10 weeks, depending on the type of installation. We confirm the timescale after your survey.
Can I spread the cost?
Yes. There are monthly payment plans and Buy Now Pay Later options, subject to status and affordability. See the finance options and representative examples, or ask us to talk you through them when we call.
Can I replace some windows now and the rest later?
Yes. We’ll help you choose a consistent design so you can plan the work in stages.
Which areas do you cover?
All of South Wales: Swansea and Gower, Neath Port Talbot, Llanelli and Carmarthenshire, Pembrokeshire, Cardiff, the Vale and Bridgend, the Valleys, and Newport and Gwent. Our own team covers Mid Wales too.
Are you the same company as Sureseal in Liverpool?
No. We are Sureseal Windows Limited, based in Pontarddulais, Swansea, serving South and Mid Wales.
Finance
Flexible ways to spread the cost
Finance can be arranged at home, decisions are quick, and you always get a clear, itemised quote before you sign anything. Credit is subject to status and affordability.
Buy Now, Pay 2027 19.9% APR Fixed
Tap to see the representative example
If settled in full within the deferred period then no interest charges will be incurred, £29 Exit Fee will apply. If not settled in full within the deferred period then interest will have accrued from the start of the contract on any amount outstanding at the end of the deferred period and will continue to be charged once you start your monthly repayments.
Representative examples:
- Cash price
- £3,000.00
- Deposit
- £0.00
- Amount of credit
- £3,000.00
- Interest rate % (fixed p.a.)
- 19.9
- Representative % APR
- 19.9
- Duration (including 12 months deferral period)
- 132
- 120 monthly payments of
- £64.50
- Total amount payable
- £7,740.00
- Settlement fee
- £29.00
- Cash price
- £6,000.00
- Deposit
- £0.00
- Amount of credit
- £6,000.00
- Interest rate % (fixed p.a.)
- 19.9
- Representative % APR
- 19.9
- Duration (including 12 months deferral period)
- 132
- 120 monthly payments of
- £129.00
- Total amount payable
- £15,480.00
- Settlement fee
- £29.00
Monthly Payment Finance, Representative APR 11.9%
Tap to see the representative example
123 or 163 months including a 3 month BNPL Period: If settled in full within the deferred period then no interest charges will be incurred, £29 Exit Fee will apply. If not settled in full within the deferred period then interest will have accrued from the start of the contract on any amount outstanding at the end of the deferred period and will continue to be charged once you start your monthly repayments.
Representative examples:
- Cash price
- £3,000.00
- Deposit
- £0.00
- Amount of credit
- £3,000.00
- Interest rate % (fixed p.a.)
- 11.9
- Representative % APR
- 11.9
- Duration (including 3 months deferral period)
- 123
- 120 monthly payments of
- £42.62
- Total amount payable
- £5,114.40
- Settlement fee
- £29.00
- Cash price
- £11,000.00
- Deposit
- £0.00
- Amount of credit
- £11,000.00
- Interest rate % (fixed p.a.)
- 11.9
- Representative % APR
- 11.9
- Duration (including 3 months deferral period)
- 163
- 160 monthly payments of
- £135.82
- Total amount payable
- £21,731.20
- Settlement fee
- £29.00
Monthly Payment Finance, Representative APR 13.9%
Tap to see the representative example
60 months including a 3 month BNPL Period: If settled in full within the deferred period then no interest charges will be incurred, £29 Exit Fee will apply. If not settled in full within the deferred period then interest will have accrued from the start of the contract on any amount outstanding at the end of the deferred period and will continue to be charged once you start your monthly repayments.
Representative example:
- Cash price
- £3,000.00
- Deposit
- £0.00
- Amount of credit
- £3,000.00
- Interest rate % (fixed p.a.)
- 13.9
- Representative % APR
- 13.9
- Duration (including 3 months deferral period)
- 63
- 60 monthly payments of
- £69.88
- Total amount payable
- £4,192.80
- Settlement fee
- £29.00
Interest-free credit over 24 months (0% APR)
Tap to see the representative example
Spread the cost with equal monthly payments and pay no interest during the promotional period (subject to availability).
Representative example:
- Cash price
- £3,000.00
- Deposit
- £1,050.00
- Amount of credit
- £1,950.00
- Duration of agreement
- 24
- Rate of interest %
- 0
- Representative % APR
- 0
- 24 monthly payments of
- £81.25
- Total amount payable
- £3,000.00
Who provides the credit? Credit is subject to status and affordability. Terms & Conditions Apply. Sureseal Windows Limited FRN: 764026 is a credit broker, not the lender and is authorised and regulated by the Financial Conduct Authority. Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC. Authorised and Regulated by the Financial Conduct Authority. Registered in England & Wales No. 10035258. VAT No. GB296090869. Business address: Woodland Farm, Tir Syr Walter, Ammanford, SA18 1JW.
Prefer to chat it through? Call 0800 233 5576 and ask about our current finance offers.
Get your free replacement windows quote
Leave your name and number, or call free and talk it through with someone local.
★★★★★4.9 from 276 Google reviews