Cold draughts and rising heating bills are often a sign your existing doors are no longer doing their job.
We replace them with secure, well‑insulated double glazed doors, made-to-measure for your home and fitted by FENSA‑registered installers, with a free home survey and a 10‑year guarantee for complete peace of mind. Choose uPVC for low maintenance, aluminium for slim sightlines with a thermal break, timber for natural character or composite for strength, security and stability.
You can specify 28mm argon‑filled A‑rated glass, laminated units on ground floor doors, multi‑point locks with a 3‑star cylinder, and continuous Q‑LON seals to cut draughts and noise in your Manchester neighbourhood.
We’ll handle the measuring, supply and installation so you avoid costly mistakes and compliance worries.
Read on to see door options, security features, glazing choices and how our replacement service works.
Takeaways
- A‑rated 28mm argon‑filled low‑E glass improves insulation and can cut heat loss by up to 60%.
- Multi‑point locking, 3‑star euro cylinders and security‑pinned hinges greatly reduce forced‑entry risk on ground‑floor doors.
- Internally beaded glazing, Q‑LON compression gaskets and correct packing minimise draughts and prevent glass removal.
- FENSA‑registered installation with certified fitters, level thresholds and tested drainage ensures compliance and long‑term performance.
- Flexible finance options and access to qualifying home‑energy grants help spread payments and lower upfront replacement costs.
Which Double Glazing Door Is Right for Your Entrance?
Which double glazed door suits your entrance comes down to climate, security, and how the door sits with the style of your property.
Start with insulation. In colder or exposed spots, go for a 28mm argon-filled, A-rated sealed unit with a low-E coating and warm-edge spacer bar. Make sure the sash has a continuous Q-LON gasket all round to cut draughts, and check the frame profile is fully reinforced so it doesn’t twist over time.
Next is security. Ask for a multi-point locking system with a 3-star British Standard euro cylinder, keeps fixed into the steel reinforcement, and hinges with security pins. An internally beaded sash makes it far harder to remove the glass from outside, which is now standard on decent uPVC and composite doors across Manchester and the rest of the UK.
Match the frame and slab colour to your brickwork and windows. Foiled finishes like anthracite grey or black hide day-to-day marks better than white, but darker colours can pick up more solar gain on south-facing elevations, so reinforcement and proper expansion gaps are important.
Think about the threshold before you order. Low PVC or aluminium ramps suit wheelchair and pushchair access but need accurate sealing and good drainage channels. Standard or slightly raised thresholds give better water resistance on exposed doorways, especially if there’s no canopy.
Factor in maintenance. GRP composite skins and foiled uPVC only need a wash down with soapy water; painted timber needs regular sanding and recoating. Ask to see the actual U-values, security ratings, and a sample FENSA certificate from the installer so you know they’re working to current Building Regulations.
Always measure the opening properly: brick-to-brick width and height, three points each way, and check for out-of-square frames. A made-to-measure door set fitted tight to packers, with minimal foam and correctly fixed through the steel, avoids gaps that cause thermal bridging and weak points for forced entry. Small shortcuts at this stage usually show up later as draughts, leaks, or locks going out of alignment.
Double Glazing Door Frames: uPVC, Aluminium, Timber, Composite
Once you’ve sorted the glass spec (usually a 28mm argon-filled, low-E A-rated unit), the frame material is the next call. It affects how warm the room feels, how often you’re out with a paintbrush, and how long the hinges and locks stay true.
uPVC is the usual choice on most jobs. It’s cheaper, insulates well, and doesn’t need painting. On taller doors we use reinforced profiles so the sash doesn’t bow, and decent hardware with multi-point locking and internally beaded frames as standard.
Aluminium costs more than uPVC but gives you slimmer sightlines and very stable frames. Modern systems use a proper thermal break, so you don’t get a cold bridge straight through the frame, and a good Q-LON-type gasket to keep out draughts. It’s a solid option if you want colour-matched frames and a leaner frame line, for example on modern extensions around Leeds.
Timber still earns its keep where character matters. A well-made, factory-finished timber door with a 28mm double-glazed unit insulates well and feels substantial. It does need regular painting or staining and careful detailing to keep water out of the joints, or you will get rot over time.
Composite doors (usually GRP over a steel or solid timber core) sit at the higher end on price but give you a very secure, stable leaf with low maintenance. You get good thermal performance, reliable multi-point locking and a skin that doesn’t need more than a wash down. For most households it comes down to this:
- uPVC for cost control and proven durability
- Aluminium for slim frames and colour options
- Timber for period style if you’ll keep on top of the upkeep
- Composite for high security and low maintenance on a made-to-measure door leaf.
Door Styles: French, Patio, Bi‑Fold & Stable
Different door styles suit different parts of the house, so it’s worth matching the design to how you actually use the space.
French doors work well in living rooms and dining rooms where you want a classic look. Go for 28mm argon‑filled A‑rated units with low‑E glass, internally beaded sashes and discreet multi‑point locking for security. Slim glazing bars keep the sightlines neat, and good Q‑LON gaskets cut down on draughts.
Patio (sliding) doors are better where you want a wide, simple opening to the garden. A low aluminium threshold makes access easier and reduces trip hazards, and we always check drainage channels and trickle vents so water clears properly. Toughened glass to BS EN 12150 is standard on panes near floor level.
Bi‑folds suit customers who want a large clear opening for indoor‑outdoor use. The weight of the sashes sits on engineered top or bottom tracks fixed into proper steel or concrete, not just the screed, so they run smoothly. Expect regular cleaning of the tracks and a light grease on the hinges yearly to keep them moving as they should.
Stable doors are useful on kitchens, utility rooms and more traditional properties. The split design lets you open the top half for ventilation while keeping pets and small children secure. A decent centre rebate, compression hinges and continuous gaskets stop draughts, and you still get a full multi‑point lock and internal beading on the glazed sections.
On every style we match the hardware and seals to the frame material, check the sill detail for water run‑off, and register the job so you get your FENSA certificate number on completion.
How Each Door Type Affects Security, Insulation and Noise
Choosing between French, patio, bi‑fold or stable doors is about more than appearance. Material, glazing and seals all influence security, heat retention and everyday comfort. Strong, well‑designed frames, advanced glass constructions and continuous, well‑fitted seals work together to limit draughts, cut noise and resist forced entry. The following sections explore how each door style performs in these areas in more detail, and what to look for in frame construction, glazing options and locking arrangements on a typical UK property.
Door Material Impact
Choosing the right door material is mostly about how you balance security, heat loss, and noise.
Timber doors feel solid and give good sound reduction, especially with a 44mm or thicker solid core, but you’ll want decent insurance-approved locks and proper keeps screwed into the brickwork. They insulate well with a good Q-LON gasket and a 24–28mm double-glazed unit, but you’ll need to keep on top of the paint or stain so the timber doesn’t move and cause draughts.
uPVC doors are low-maintenance and give strong thermal performance when fitted with a steel-reinforced frame, 28mm argon-filled, low-E glass, and proper compression seals. They’re secure enough with a modern multi-point locking system and anti-snap cylinder, but budget frames without reinforcement or internal beading are easier to attack and should be avoided.
Aluminium doors give you slim sightlines and excellent strength from the aluminium profile and hinge gear, which is useful on wide openings or heavy triple-glazed units. To keep them warm and quiet, you need a proper thermal break in the frame and good-quality gaskets, otherwise the metal can conduct cold and let more road noise through compared to a thicker composite slab.
Composite doors tend to give the best balance for most homes in Manchester: a thick GRP skin, insulated core, 28mm A-rated glass units, and full perimeter seals keep heat in and noise down, while a multi-point lock, security hinges, and an internally beaded frame give strong security. Upfront cost is higher than basic uPVC, but they age well, don’t need repainting, and you get consistent performance as long as they’re installed square and signed off with a FENSA certificate on completion.
On lifespan, timber can be sanded, filled, and repainted, which spreads the cost over decades if it’s maintained. uPVC resists rot and never needs painting, aluminium profiles last for many years but need the right finish in coastal areas to reduce corrosion, and modern composites keep their colour and shape without much more than a clean and a hardware check.
Whatever you pick, ask for tested security (multi-point locking and good cylinders), verified thermal performance on the door set, and A-rated sealed units where there’s glass, so it matches your property, energy bills, and local security risk.
Glazing And Seals
Glazing and seals aren’t an afterthought – they’re what actually give you security, insulation and noise reduction.
On new units we’ll always push you towards laminated or toughened A-rated glass, especially on ground floor and accessible windows. Laminated panes give better security and cut down traffic noise, and a 28mm argon-filled, low‑E sealed unit will usually outperform older 20mm units by a clear margin on heat loss.
We use internally beaded units as standard so the glass can’t be popped out from outside. Glazing beads are cut and fitted tight to the frame, with packers set correctly, so you don’t get rattling panes or gaps that let water track behind the seals.
For draught and water tightness, the detail is in the gaskets. A continuous Q‑LON compression seal around the sash and frame does a better job than simple brush strips, and it keeps its shape longer so you’re not calling us back in two winters’ time.
On timber frames you’ll always have a bit more upkeep – repainting and checking putty lines to stop water getting in. uPVC and aluminium systems give more consistent seal contact, but on aluminium we’ll always check the thermal break in the profile so you don’t end up with cold spots or internal condensation.
After installation we check seal compression all the way round with the sashes closed, and adjust keeps on the multi‑point locks so the gaskets are working properly. If you spot flattened, cracked or shrinking seals later on, get them swapped out before it turns into rot, draughts or whistling on windy days.
All glazing and sealing work is logged on your FENSA certificate, and you’ll get the certificate number on completion so you’ve got proof the installation in, say, Manchester, meets current Building Regulations.
How Much It Costs and What to Budget for Replacement
Costs for replacing double‑glazed doors can range from a few hundred to several thousand pounds, depending on size, frame material and glass specification, so it helps to set a realistic budget early on. It’s also worth considering lifetime costs, including maintenance such as seal replacement, hardware adjustments and general upkeep. The next sections break down what typically drives prices up or down, how to plan for long‑term value, and what to check in quotes and warranties before committing.
Average Replacement Costs
Budget for a fair spread in prices – it depends on the door style, frame material, glass spec and how awkward the install is.
As a rough guide:
- Basic uPVC front or back door: from around £750–£1,100 supplied and fitted, using a 28mm A-rated argon-filled unit with low‑E coating and multi‑point locking. Good thermal improvement over old timber, clean and low‑maintenance.
- Composite door: typically £1,200–£1,800 fitted, with a GRP skin, insulated core, Q‑LON gaskets and multi‑point locking. Better security and draught‑proofing, looks closer to timber.
- Aluminium or large glass units (patio, French, sliders): commonly £1,600–£3,000+ depending on size, using slim thermally broken profiles and 28mm argon‑filled sealed units. Often chosen where you want more glass and slimmer frames.
- Made‑to‑measure sizes, side panels, or upgraded glazing (laminated, acoustic, solar control): expect a premium over standard sizes, especially once you get beyond typical openings.
Installation costs go up if we need steels put in, alter brickwork, deal with rotten lintels, or bring access equipment. On older properties around Manchester, it’s common to find hidden rot that needs extra joinery or making‑good, so it’s sensible to allow a small contingency.
Always get at least three written quotes on the same spec (e.g. 28mm A‑rated argon‑filled, low‑E, internally beaded, multi‑point locking), check what’s included for making good, and confirm the warranty in years for frames, glass and hardware. Make sure your fitter issues a FENSA certificate number on completion so building control and future buyers can see the work meets regs and can help with resale value.
Ongoing Maintenance Expenses
Ongoing Maintenance Costs
To keep A-rated, 28mm argon-filled units working properly and avoid surprise call-outs, allow a small amount each year for upkeep. Most homes are fine budgeting around £20–£60 a year for proper glass cleaner, hinge and lock lubricant, and giving Q-LON gaskets and drainage slots a quick check.
Every 5–10 years, expect to spend £50–£150 on bits like new espag locks, handles or replacement gaskets, depending on how often the windows are used. Over 10–15 years, put aside £200–£800 for the odd failed sealed unit, hinge sets or a hardware overhaul, especially on exposed faces or upstairs bays.
Book a simple annual inspection: check for draughts around the frames, misting between panes, stiff multi-point locks and any damage to internal beading. Catching condensation or minor gaps early usually means a cheap gasket or adjustment, not a full frame replacement.
Keep all invoices, your FENSA certificate number and any hardware warranties together so we can match parts and honour guarantees. Improved insulation should trim heating use, but rising energy rates affect payback time, so review bills each year and make sure the low‑E coating glass is still doing its job.
How to Measure for a Replacement Door Correctly
Measure the existing opening properly before you order, or you risk a door that rubs, won’t seal on the Q-LON gasket, or needs trimming on site. Work to the tightest measurement, not the biggest, so the new made-to-measure door and 70mm frame sit square and the multi-point lock engages cleanly.
Use a decent tape and a spirit level. Take three widths (top, middle, bottom) and three heights (left, centre, right) inside the frame and write them all down. Check the diagonals of the opening as well; if they’re out by more than a few millimetres, the frame isn’t square and we’ll need to allow for that in the new frame and packers.
Check the threshold against the finished floor level, not the old carpet you’re about to rip up. You need enough clearance for the new low aluminium threshold and any internal floor covering so the door leaf swings without catching and the compression on the draught seal is even.
Mark and measure hinge positions on the existing door and frame so we can line up the new gear where possible and avoid stressing the PVC-U or composite skin. Note the jamb depth and where the stops sit so the new internally beaded frame, 28mm argon-filled low-E unit, and keeps for the multi-point locking system land in the right place.
If any measurement is out of tolerance, we’ll flag it before manufacture and adjust the order, rather than you paying twice for a door that never quite closes right.
Installation Options, Lead Times, and a Fit‑Day Checklist
You’ll usually be choosing between:
- supply-only
- supply-and-fit
- fully managed installation
Pick the one that matches your confidence, access, and how happy you are dealing with on-site tweaks.
Supply-only keeps the price down but you must have accurate brick-to-brick and structural opening sizes, and the tools to handle and fix a 28mm A-rated, argon-filled unit safely. Supply-and-fit is the usual middle ground: we measure, order, fit, foam, seal, and trim, then leave you to decorate. A fully managed install suits flats, tight access, or awkward openings, where we handle access equipment, skips, and any making-good around the frames.
Confirm lead times before you sign anything. Fabrication of made-to-measure frames, toughened safety glass, and specialist colours can push delivery to 4–6 weeks, longer in poor weather. Get a written install date and ask what happens if the supplier delays the frames.
On fit day, run through:
- what’s included (frames, cills, trickle vents, handles, trims)
- floor and furniture protection
- waste removal and recycling of old frames and glass
- parking and access for the van and any tower or scaffold
Check how they’ll deal with existing render, tiles, or cladding so you don’t end up with exposed edges or blown plaster. Agree how the external silicone lines will finish against brick, and how the internal cill and trims will be cut into your skirting or architrave.
Ask for simple progress milestones on site: old units out, new frames fixed, glass in, packers set, multi-point locks adjusted, final seal. Before they leave, walk the job and test every sash, handle, and lock; confirm the Q-LON gaskets are seated all round and that any low aluminium threshold is level and sealed to stop draughts and water tracking under your floor.
Keep a short aftercare checklist:
- smooth operation on all openers, no frame rub
- seals and drainage slots clear and unblocked
- hardware aligned so the multi-point locking engages fully
- trickle vents opening and closing cleanly
- glass units seated correctly with internal beads tight and even
Photograph any snags, agree a written snag list on the day, and get a clear timescale for putting them right, usually within 7–14 days for a domestic job in Manchester. File your invoices, guarantees for the frames and glass units, hardware warranty, and the FENSA certificate number, so you’ve got everything to hand for any post-fit issues or future house sale.
Frequently Asked Questions
Can Double Glazing Doors Be Fitted in Listed or Conservation Properties?
Yes, you can, but with listed and conservation properties it has to be done very carefully and often needs planning consent. Speak to your local conservation officer first, then we’d look at slimline double-glazed units, traditional-looking timber frames and heritage ironmongery, and use a specialist installer so you keep the character while improving warmth and security.
Do Replacement Doors Affect My Home Insurance Policy or Premiums?
Yes, changing your doors can affect your insurance, especially if security or fire protection is different from what’s on your policy. Let your insurer know before we fit anything, keep all invoices, FENSA certificates and lock specs, and ask them to confirm any changes in writing, as better multi-point locking can lower premiums but poor or non-compliant doors can limit cover.
Are There Eco-Friendly Glazing Options or Low‑Carbon Manufacturing Choices?
Yes, you can go greener with your glazing. We can use recycled glass, low‑e A‑rated 28mm argon‑filled units in thermally efficient frames, and where possible source from local FENSA‑registered manufacturers. You might pay a bit more upfront, but you’ll typically see lower heating bills, and we can provide 10‑year guarantees plus end‑of‑life recycling options.
What Warranties Cover Labour, Glass Breakage, and Hardware Defects?
You’ll usually have the manufacturer’s warranty on the sealed units and hardware, and a separate labour guarantee from the installer. Most decent firms give around a 10‑year guarantee on frames, glass and moving parts, with 1–2 years on fitting, but accidental damage isn’t covered, so keep all paperwork and ask for the terms in writing.
Can Pet Flaps or Mail Slots Be Integrated Without Compromising Security?
Yes, done properly they won’t weaken your security. We’d use a reinforced pet flap with anti-snap fittings and restricted access, plus a secure, tamper-resistant mail slot or internal chute to stop fishing. Pair that with a decent multi-point lock, good glazing reinforcement and regular checks on seals and fixings to keep the door solid and secure.