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★★★★★ 4.9 from 278 Google reviewsFENSA registeredSwansea based

Door installation

A high-spec door only works as well as the way it’s fitted. True, plumb frames, correct packers, calibrated locks and a weatherproof threshold are the difference between “looks fine” and “feels exceptional”.

★★★★★4.9 from 278 Google reviews
Door installation and replacement

Our door installation service is handled by experienced, local door fitters who plan the finish before the first screw — so your new entrance shuts with a confident clunk, seals tightly against draughts, and stays smooth through years of daily use.

We survey meticulously, manufacture to precise sizes and install tidily, coordinating colours, trims and hardware so your door looks intentional from the street and effortless from inside. You’ll get clear communication, respectful work on site and documentation you can trust.

Door types we fit — front, back and glazed sets

We install the full range with equal care:

  • Composite front doors — timber-look skins over insulated cores for a premium feel and excellent security
  • UPVC doors — great value, low maintenance and strong thermal performance
  • Aluminium doors — slim, rigid frames for contemporary entrances and large glazed areas
  • French and patio doors — secure garden access with energy-efficient glazing and neat thresholds
  • Aluminium bi-folds — smooth-running systems with traffic-door options for everyday use

Whatever you choose, we keep colours, furniture and sightlines consistent with your windows for a coherent façade.

Why survey detail matters before door installation

A precise survey prevents most on-the-day headaches. We record:

  • Opening size, squareness and any bow in surrounding brickwork
  • Lintel condition, cill levels and floor build-ups for threshold planning
  • Clearances for tiles, carpets, internal reveals and external paths
  • Ventilation and safety-glass requirements, plus any conservation constraints
  • Side-panel and top-light dimensions to align sightlines and keep glazing proportions tidy

If anything would compromise performance or appearance, we flag it and propose a fix before manufacture.

Thresholds and water management — comfort starts at the step

Good looks mean little if the threshold drips or snags. We:

  • Choose the right threshold profile (weathered, low or near-flush) for your exposure and accessibility needs
  • Set drainage paths so water moves away from the opening, not into the track or under the slab
  • Fit cill end caps and seal junctions carefully to prevent wind-driven rain ingress
  • Align internal flooring transitions to reduce trip points and draught paths

Result: a door that keeps weather out and daily life flowing.

Security set up the right way, not just “fitted”

Security relies on alignment and fix strength as much as specification. Our fitters:

  • Anchor frames with fixings sized to your substrate and at correct centres
  • Line up keeps so multi-point locks bite firmly without forcing the handle
  • Fit high-security cylinders (anti-snap, anti-pick, anti-drill) and set them correctly within hardware
  • Add hinge bolts where appropriate and verify compression at the hinge side
  • Recommend laminated safety glass in vulnerable panes

From the pavement, you see clean lines, not bulky hardware — with protection you can trust.

Energy efficiency preserved at the perimeter

Even A-rated doors underperform if air leaks at the edges. We focus on:

  • Continuous internal air sealing to stop micro-draughts into the reveal
  • External weather seals that flex with seasonal movement and stay neat
  • Warm-edge glazing cassettes and tidy seal lines around sidelights/top lights
  • Correct packer placement to keep the slab square and compression seals working

That’s how the numbers on paper become everyday comfort in your hallway.

Composite door installers who care about the finish

Composite slabs feel superb when the finish looks intentional. We ensure:

  • Even gaps around the slab for a premium, balanced appearance
  • Colour-matched sealants and trims to avoid visual “noise”
  • Furniture positioned precisely, with letterplate draught control set correctly
  • Neat gasket lines and cassette seating around glazed panels

Your entrance looks like it was designed for the house — not squeezed to fit.

uPVC door installation — value without corner cutting

Our uPVC door installation follows the same standards as composite and aluminium:

  • True frames to protect hinges and keepers from wear
  • Proper packers and toe-and-heel glazing where needed
  • Tight brush stacks and compression seals that don’t leave light gaps
  • Clean mastic lines that stay tidy and easy to keep clean

Low maintenance, strong insulation and a fair price — done right.

Door fitters you can brief with confidence

You’ll get straightforward advice and calm project management:

  • Clear, itemised quotations so you know where every pound goes
  • Realistic timelines and courteous communication
  • Respectful conduct on site with dust protection and end-of-day tidy-ups
  • Responsive aftercare if anything needs a tweak as the door beds in

We’re local, accountable and easy to reach.

Local door installers — coverage and coordination

We install across Wales and the West, coordinating doors with existing or new windows so colours and hardware match. Planning a larger renovation? We’ll liaise with your builder or decorator so reveals, plaster lines and external trims align perfectly.

What customers say

Rated 4.9 out of 5 on Google and Trustpilot

4.9
★★★★★278 Google reviews
FENSA approved window and door installations
Posted on Google Google
Steve Young profile picture
Steve Young
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No fuss quote, work carried out on time, great job, polite friendly team & left everything clean & tidy. Have recommended to my friends.
Posted on Google Google
Nigel Jenkins profile picture
Nigel Jenkins
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We had our windows and doors replaced by Sureseal Windows and could not be happier. We had a home visit from the salesman, who went through the various designs and colours available plus an initial measurement of all the items needed. Following our agreement to purchase the doors and windows a supervisor visited to precisely measure the openings and look for any issues that might arise during the install. The fitting was booked in about 10 weeks later. Alan contacted us to give his ETA of the morning of the start of the job. And we cannot praise Alan enough for his work and cleaning up after. All areas where work was done were covered with dust sheets and no mess was left. There were a couple of remedial jobs to be completed when the parts were available. Sean completed these jobs for us over a coarse of a morning. And, as with Alan previously Sean's work was great and all was cleaned up on completion. Both workers are a credit to SureSeal. And we highly recommend the Company.
Posted on Google Google
shirley powell profile picture
shirley powell
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Absolutely amazing service, with price and installation, very clean when he finished,
Posted on Google Google
MIck Hedges profile picture
MIck Hedges
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From initial call from Sureseal making appointments to choosing our windows all the team have been very knowledgeable and helpful, No big sell to get the costs up just what we wanted and even reduced aspects no of closers etc. to meet requirements. Plenty of payment options with full explanation again no push either way. Survey was again very straightforward and with some discussion even more savings found. Pleasure to do business with. Great service and very knowledgeable.will post photos of finished project once complete. Mike Hedges
Posted on Google Google
Adam Wisniewski profile picture
Adam Wisniewski
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Excellent company. Got all windows and doors installed professionally, as agreed and on time. Very good quality product professionally installed. Will always recommend
Posted on Google Google
Dolores Furlong-Martin profile picture
Dolores Furlong-Martin
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We had all new windows and doors from sureseal. A very skilled fitter installed them. We had a couple of issues after but were resolved immediately. Would certainly recommend this company from start to finish a great job and a very happy customer
Posted on Google Google
Sarah Thomas profile picture
Sarah Thomas
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Extremely efficient, professional and helpful company. Exemplary fitter. Would highly recommend and have already done so!
Posted on Google Google
Sam Rowe profile picture
Sam Rowe
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Would definitely recommend Sureseal, especially the service engineers who have been very helpful and professional!
Posted on Google Google
Michael Curling profile picture
Michael Curling
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Sureseal windows has completed installation of my windows to a very high standard with excellent work by the lone installer who was very organised and polite and completed within the time frame quoted I highly recommend this firm
Posted on Google Google
Livia Toth profile picture
Livia Toth
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Sureseal windows all team very good. Customer service always available, helpful and professional. Alan very kind, polite and professional. He knows what he is doing and working hard. I am above and beyond. Thank you so much.
Rated Excellent on Trustpilot: TrustScore 4.9 from 495 reviews

Your free quote

Your free 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 278 reviews

Questions

Your questions, answered

How long does a typical front door installation take?

Often a single morning or afternoon, including removal, fit, sealing and tidy. Sets with side panels or structural making-good can take longer; we’ll confirm at survey.

Will a low threshold still be weather-tight?

Yes — when detailed correctly. We balance accessibility with weather performance and set drainage so water moves away from the opening.

Can you reuse my existing side panels?

Sometimes. We’ll check sizes and condition; often a new, matched set provides better sealing, sightlines and thermal performance.

Do you dispose of the old door and frame?

Yes. We remove all waste and dispose of it responsibly.

Can I match the new door to my windows?

Absolutely. We coordinate colours, grains and furniture so everything looks designed as one.

Ready to talk about your home?

Leave your details and one of our local team will call you, or ring us free on 0800 233 5576.

★★★★★4.9 from 278 Google reviews
★★★★★4.9 from 278 Google reviews
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