Composite Doors
A front door that earns its place on your home, not just fills the gap
We have been fitting composite doors across South Buckinghamshire and East Berkshire since 2003. Every installation is FENSA registered and handled personally by our own team.
Composite doors fitted across South Bucks and East Berkshire
Your front door works harder than any other part of your home. Most people only replace it when it stops working properly.
A composite door is built from multiple bonded materials — typically a dense foam or timber core wrapped in a glass-reinforced polymer skin and set within a robust frame. The result is a door that holds its shape through temperature changes, resists forced entry, and requires almost no maintenance beyond an occasional wipe down. It is why composite doors now account for the majority of entrance door replacements across the UK, and why they suit such a wide range of properties — from Victorian terraces in Slough to larger detached homes in Gerrards Cross and Beaconsfield.
Most people reach this page because something has prompted them to act. The paint is flaking and the timber underneath is soft. The door is draughty along the bottom or at the lock. It sticks in winter and rattles in the wind. Or the frame has finally reached the end of its life after years of damp. Whatever the trigger, the decision to replace it properly is the right one. When we visit your home, we bring physical samples so you can see colours and finishes in natural light against your own brickwork. We will advise honestly on what suits your property — and if a composite door is not the right choice for your situation, we will say so.
Why it matters
What a well-specified composite door brings to your home
Security
Significantly stronger than timber or standard uPVC
A composite door's bonded construction means it does not have the natural weak points of a timber door — the areas around the letterbox, the hinge side, and the lock face. Multi-point locking engages the frame at multiple points simultaneously, rather than relying on a single latch. The glass-reinforced polymer skin resists impact far better than a standard uPVC panel. Homes with composite doors certified to PAS 24 see measurably lower rates of successful forced entry. For homeowners in areas like Denham and Gerrards Cross, where properties are detached and set back from the road, a properly specified front door is a meaningful security measure.
Warmth
Less heat lost through the front door than most homeowners expect
The dense foam core used in composite construction provides substantially better thermal performance than a hollow uPVC door or a single-skin timber panel. A draughty front door — one that you can feel on a cold morning when you stand in the hallway — is losing heat continuously, not just when it is opened. Replacing it with a well-fitted composite door, with correctly installed seals around the perimeter, addresses this at source. The difference is noticeable almost immediately, particularly in older properties where the original door was never particularly well sealed.
Appearance
A door that improves the kerb appeal of the whole property
The front door is the first thing a visitor sees and the last thing they look at when they leave. On a property worth several hundred thousand pounds, a tired, faded or ill-fitting door sends a signal that is hard to undo with everything else. A well-chosen composite door — the right style, the right colour, the right hardware — has the opposite effect. It gives the property a settled, cared-for quality. Estate agents regularly identify a new front door as one of the highest-return cosmetic improvements a homeowner can make before selling. For properties in Ascot, Beaconsfield and the villages of South Bucks, where first impressions carry weight, this matters.
Maintenance
No painting, no swelling, no seasonal adjustment required
Timber doors require painting every few years to prevent the underlying wood from absorbing moisture, swelling, and eventually rotting. Composite doors do not. The external skin is coloured through its material rather than painted on, which means it does not peel or fade at the rate that painted surfaces do. The door does not absorb moisture, so it does not expand in winter and contract in summer — the phenomenon that causes timber and some uPVC doors to stick or drop over time. Cleaning is straightforward: a wipe with a damp cloth is sufficient for the vast majority of maintenance needs.
Our work
Composite doors fitted across South Bucks and East Berkshire
Black composite door · Fulmer
01 / 08Styles
Traditional, cottage or contemporary — the right door for your property
The style of composite door that works best depends on the age and character of your property, the surrounding streetscape, and what you are trying to achieve. We will discuss all of this during the home visit, but the broad categories below give a starting point.
Most Popular
Traditional Panel
The classic four-panel or part-glazed front door design that suits the widest range of UK property types — from 1930s semis through to newer builds on modern estates. Available in solid colours or a woodgrain effect finish, with a choice of glazing inserts for the upper panel. This is the style that most closely matches the proportions and detailing homeowners in Gerrards Cross, Taplow and Burnham are replacing like-for-like, only with far superior performance.
Best for
Increasingly Popular
Contemporary Flush
A flat-faced door with clean sightlines and minimal surface detailing, designed to sit well on more modern properties or on period homes that have already been extended or updated in a contemporary direction. Works particularly well in solid dark colours — anthracite grey, black and slate are consistently popular choices. If you are pairing a new door with aluminium windows or bi-fold doors to the rear, a contemporary composite at the front brings the whole scheme together.
Best for
Character Choice
Cottage Style
A lower-height design with a stable-style split or distinctive period detailing — diamond glazing, arched lights, or a solid panel with cottage proportions. Particularly well suited to older properties along the village lanes of Fulmer, Farnham Royal and Iver, where the door needs to feel like it belongs rather than stand out. Available in heritage colours — sage green, dark blue, racing green, and off-white — alongside the more contemporary solid palette.
Best for
What to consider
The decisions that shape how your door looks and performs
A composite door involves more choices than it first appears. We walk through every one of these with you during the home visit, with physical samples to hand, so nothing is decided from a screen or a brochure.
01
Colour — inside and out
Composite doors can be specified in different colours for the external and internal face. The exterior colour is chosen to suit the property and the street; the internal colour is chosen to work with your hallway. The two do not need to match and often should not. Solid colours — anthracite grey, black, sage green, dark blue — currently account for the large majority of choices we see across Ascot, Windsor and Stoke Poges, with woodgrain effects remaining more common in conservation area properties where a timber appearance is preferred or required.
Practical note
Colour samples are brought to the home visit so you can view them in natural light against your actual brickwork — not on a screen where calibration varies.
02
Glazing inserts
The glazing panel — if your chosen style includes one — affects how much natural light reaches your hallway, how private the entrance feels, and how the door reads from the street. Options range from a clear full-length panel to obscured or decorative inserts, including leaded and bevelled glass effects that suit period properties. If your current door is solid and your hallway is dark, introducing a glazed upper panel can make a meaningful difference to how the space feels from inside.
Practical note
All glazing within composite doors meets the thermal and safety requirements of current building regulations as standard.
03
Frame and surround
The frame that surrounds the door slab is as important as the door itself — both structurally and visually. A poorly fitted or mismatched frame undermines the whole installation. We assess your existing frame during the visit and advise whether it can be retained or whether replacement is the right approach. Side panels and overhead fanlights can also be incorporated where the opening allows, which works particularly well on wider Victorian and Edwardian porches found throughout Beaconsfield Old Town and parts of Windsor.
Practical note
If your brickwork or stonework around the existing frame shows signs of settlement or movement, we will flag this before any work is agreed.
04
Hardware and security specification
The handle, letterbox, knocker and numerals are the details that make a door feel considered rather than standard. These are chosen during the visit from a range of finishes — chrome, brushed nickel, gold, and black are the most common pairings with current door colours. On security, every composite door we fit includes a multi-point locking system tested to PAS 24, the standard required for secure-by-design compliance. The cylinder is the most commonly attacked component — we specify anti-snap, anti-pick cylinders as standard, not as an upgrade.
Practical note
If you have a smart lock or key safe in mind, let us know before the visit so we can advise on compatibility with the locking system specified.
Reviews
What your neighbours are saying
Real reviews from homeowners across South Bucks and East Berkshire. Every one verified through Google.
I had a new window fitted, Joe and Bob behaved in a professional manner at all times and the work was done to a high standard. I would have no hesitation in using Alpha Windows again. Joe and Bob came again today and fitted a new door on my garage. A very professional finish.
Stuart Jones
Gerrards Cross
Having used Alpha Windows in our school in Gerrards Cross, we found their experience and ability to work around the schedule very helpful. The managers and owner have been great with communication and very personable. Installers resolved issues quickly and the end result has helped with heat retainment and aesthetics. Great experience.
Chris Ohanians
Gerrards Cross
They replaced all the windows in our 3-bed house. Very good service and competitive prices. Good communication and very happy with the windows.
Kiran Arhestey
Windsor
Alpha Windows are brilliant. Great customer service, great windows, competitively priced and superbly fitted. Their fitter is so good and diligent that he managed to fit the replacement windows with barely any disruption to the plaster. I don't even need to repaint around the aperture. Highly recommend.
Nathan Turner
Ascot
New lantern installed, great job. Victoria in the office, Joe overseeing everything and Jack installing made the whole process a pleasure. Would recommend to anyone.
Martin Rosen
Stoke Poges
We used this company for our patio doors, their communication and service was great. We are really happy with the work completed and love our new doors.
Lauren Willcox
Iver
Common questions
What homeowners ask us about composite doors
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The clearest signs are physical: visible rot or softness in a timber door, particularly around the bottom rail and the frame; a draught you can feel when standing close to a closed door; a lock that is difficult to engage or a door that no longer sits squarely in its frame. Cosmetic deterioration — paint that no longer holds, a surface that looks permanently tired despite cleaning — is a secondary signal. If the door is sound structurally but only looks worn, it may be possible to address that without full replacement. We will give you an honest assessment during the visit.
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This is a fair concern, and it applies to composite doors that are poorly specified or fitted without attention to the surrounding architecture. A door chosen without reference to the property's proportions, paired with the wrong hardware, or set in a frame that does not match — that combination can look out of place. A well-specified door, chosen to suit the style and period of the property, does not. The range of styles, finishes, glazing options and hardware available now is broad enough to produce a result that looks considered and specific to the house, rather than interchangeable with every other door on the street. We bring samples to every visit precisely so these decisions are made against the actual property, not against a photograph.
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For the majority of properties in South Buckinghamshire and East Berkshire, replacing a front door is covered by permitted development rights and does not require a planning application. The exceptions apply to listed buildings, where listed building consent is required for any external alteration, and to properties within conservation areas — including parts of Beaconsfield Old Town and Windsor — where material or style changes may need approval from Buckinghamshire Council. If you are in either category, we will identify this during the visit and advise you on how to proceed before any work is agreed.
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A standard single-door installation is typically completed within a day. Our fitters remove the existing door and frame, prepare the opening, and fit the new frame and door slab in sequence. Internally, the surrounding reveals are made good and any remedial work to the plaster or render is addressed before we leave. The door is tested and adjusted before sign-off — we check that the lock engages smoothly at all points, that the seals sit correctly around the perimeter, and that the handle and letterbox are secure. You are walked through the operation of the lock and shown the anti-snap cylinder before we finish.
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For most window and door replacements, no. Like-for-like replacements fall under permitted development rights and require no planning permission. If your property is in a conservation area — parts of Windsor and Beaconsfield Old Town, for example — or if it's listed, there may be restrictions on colour, style, or material. We know the local areas well and will flag anything relevant during your visit.
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Yes. FENSA registration means every installation we complete is certified to meet current building regulations, and the work is registered with your local authority automatically. This is important if you ever sell your home — solicitors will ask for it. You don't need to do anything; we handle the registration on your behalf.
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Our installations come with a 10-year guarantee as standard, covering both frames and sealed glazing units. Combined with FENSA registration and our full public liability insurance, you're protected throughout the installation and long after completion.
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Yes. We remove all old frames and glass and dispose of them responsibly. We also leave your home clean and tidy at the end of every job — it's part of how we work, not an optional extra.
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We don't consider a job complete until you're satisfied. If something isn't right, tell us and we'll fix it. Our reputation in South Bucks has been built over 20 years — we have every reason to make sure you're happy.
The process
What happens from first contact to finished installation
Get in touch
Tell us what you are thinking
Fill in the short form below or give us a call on 01753 663663. There is no obligation and no sales process triggered by making contact — just let us know what you are considering and we will take it from there.
We visit your home
A proper look at your property
We visit at a time that suits you — usually within a few days. We measure every opening, assess what is there, and talk through your options honestly. We bring samples so decisions can be made against your actual property in natural light.
Your written quote
Clear costs, no surprises
We follow up with a written quote that covers everything involved. No hidden charges, no items that appear later. There is no pressure to decide on the day and no uninvited follow-up calls. You take as long as you need.
Installation
Done properly, left tidy
Our fitters work through each opening one at a time so your home is never left exposed. Furniture and flooring are protected throughout. Old frames are removed and disposed of. Before we leave, everything is tested and you are walked through the result.
Free no-obligation quote
Get a free quote for your composite door
Tell us a little about your property and what you are looking to replace. We will be in touch within one working day to arrange a visit at a time that suits you — no obligation, no automated calls, just a straightforward conversation about what you need.
What to expect
No pressure, no obligation
We'll never chase you or push for a decision on the day.
We visit your home personally
Every property is different — we measure properly before quoting.
Clear, itemised quote — no hidden costs
A written quote with everything included. Take as long as you need.
Your details stay private
We'll never share your details or add you to a mailing list.






