Condensation between panes and draughts around tired frames can leave your conservatory or garden room cold, misty and expensive to heat.
We replace or upgrade your glazing with made-to-measure, energy-efficient double glazed units, fitted by FENSA-registered installers, backed by a free home survey and a 10-year guarantee.
You’ll get carefully specified A-rated 28mm argon-filled units with low-E coatings, warm-edge spacers and trickle vents to improve thermal performance and reduce condensation.
Frames and roof systems are chosen to suit your property, local planning requirements and weather exposure, with secure multi-point locking and factory-sealed units as standard.
From initial survey and clear pricing through to installation and compliance, every stage is managed for safety, comfort and long-term value across Reading and the surrounding area.
Read on to see how the right double glazing can transform your conservatory, orangery or glass extension.
Takeaways
- A-rated 28mm argon-filled low‑E glazing cuts heat loss and heating bills, while warm‑edge spacers reduce condensation.
- Laminated and toughened safety glass improves security, meeting PAS 24 standards and protecting doors, windows and glazed roofs.
- FENSA or Certass registration and insurance‑backed guarantees provide proof of compliance, safeguarding resale value and warranties.
- Made‑to‑measure surveys, off‑site fabrication and one‑day installations minimise disruption and keep most projects under two weeks.
- Interest‑free credit and low‑deposit finance options spread the cost, while some energy‑saving upgrades may qualify for local grants.
Which Glass Room Is Right for You? Quick Decision Guide
Choosing the right glass room is mainly about how you plan to use it, what the site will take, and the performance you expect from the glazing.
Start with use. A space for year-round living or dining needs insulated frames and 28mm argon-filled units with low-E glass, trickle vents and good cross-ventilation. A greenhouse-style room can use simpler framing, more manual roof vents and higher solar gain glass to keep plant growth steady.
Then look at the site. We check the orientation, exposure to prevailing wind and the load the existing wall or slab can safely carry before fixing anything. That decides the frame system, fixing method and roof pitch, so you don’t get uplift problems or deflection in high winds.
Set clear performance targets. For a proper living space in Leeds, most customers go for:
- A-rated, 28mm argon-filled units with warm-edge spacer bars
- Low-E coating to keep U-values down around 1.2–1.4 W/m²K
- Toughened or laminated safety glass to BS EN standards in roofs and critical areas
Add in the practical bits early. Multi-point locking and internally beaded frames for security, Q-LON gaskets for long-term draught-proofing, and options for automated roof vents or blinds if the room faces south. We size everything against your budget, then confirm the specification, projected running costs and maintenance so you know exactly what you’re paying for before we register the job and issue the FENSA certificate number on completion.
Types Compared: Conservatory, Orangery, Garden Room, Glass Extension
Choosing the right glazed addition is about matching the structure to how you’ll actually use the space, how warm you want it, and how much glass you can sensibly have.
A conservatory is a lightweight frame with a high glass-to-frame ratio, usually 28mm argon‑filled A‑rated sealed units with low‑E coating. Lots of solar gain, so good for spring and autumn, but you’ll need decent roof glazing and trickle vents to stop it overheating. Frames should be fully reinforced uPVC or thermally broken aluminium with multi‑point locking and internally beaded units for security.
An orangery uses more masonry and an insulated parapet, with a large roof lantern in the middle. You get better thermal control than a full conservatory because the solid sections take thicker insulation and you can hit current U‑value targets more easily. We’ll specify insulated warm-roof build‑ups, Q‑LON gaskets on opening lights and argon‑filled roof glass to cut heat loss.
A garden room is basically a small extension built to full house standards. Solid cavity walls, proper tiled or GRP warm roof, and high‑performance double or triple glazing mean it’s suitable for year‑round use without electric heaters running all day. You can expect our standard A‑rated 28mm units, trickle ventilation, and a FENSA certificate on completion for the glazed elements.
Glass extensions sit between a conservatory and a full extension. You still get full‑height glazing for light, but on thermally broken frames with insulated roofs so you can meet current building‑regulation U‑values. We’ll look at glazing ratios, frame sections and roof build‑ups so the space is usable in winter without draughts or condensation building up on the units.
On every option we check:
- Glazing ratio against intended use (occasional sitting area vs everyday living space).
- Frame thermal breaks and gasket quality to keep out cold and noise.
- Roof construction and insulation thickness to meet or better the required U‑values.
Ongoing care is straightforward but important: check seals yearly for perishing, keep gutters and box gutters clear, and have cracked or failed units (misting between panes) replaced promptly. We’ll also flag up planning, listed building issues and any party wall implications at survey stage so your job in, say, Manchester doesn’t get held up halfway through.
Choosing the Room Type: Living, Dining, Office or Plant Conservatory
Choosing how a glazed room will be used – as a living area, dining space, home office or plant‑focused conservatory – shapes every design decision that follows. Each option brings its own acoustic, thermal and space‑planning priorities, from managing heat loss and solar gain to accommodating equipment, furniture and planting. The next sections explore how these functional choices influence glazing specification, insulation and ventilation strategies, as well as circulation, daylight quality and structural loading across different room types.
Purpose And Function
Start by being clear what the room is mainly for – living space, dining, home office or a plant room – and we’ll set the frame, glazing and ventilation up to suit. That’s where we decide things like 28mm argon-filled A-rated units, low-E coated glass, trickle vents and frame reinforcements, so the space actually feels comfortable and does its job year-round.
For a home office we’ll usually push for larger fixed panes with slimmer sightlines to get good daylight in, then add opening sashes and trickle vents for fresh air without a constant draught. On dining and living areas, we’ll plan the openings around your furniture and walkways, using multi-point locking and internally beaded sashes on doors and side panels so they’re secure but easy to use.
A plant room or conservatory needs different glass again: more diffused light, solar control options, proper drainage in the cills and good trickle ventilation so the humidity doesn’t cause condensation on the frames. In all cases we specify:
- Fixed vs opening lights to match how the room is used
- Safety glazing to BS EN 12150 in critical areas
- Q-LON gaskets for a tight weather seal
- Separate heating/ventilation zones where needed
Every job gets a FENSA certificate number on completion, so you’ve got the paperwork to show the installation matches current Building Regulations and isn’t over- or under-specified for how you actually use the room.
Heating And Insulation
The room use sets your comfort targets, but the basics don’t change: get the U‑values, thermal breaks and heating zones right at the design stage, so the conservatory actually performs once it’s built. For a living or dining space, specify A-rated, argon‑filled 28mm low‑E units with warm‑edge spacers and proper thermal breaks in the frames to cut heat loss through the glass and frames.
On that type of room we usually pair the glazing with underfloor heating for steady, low‑temperature heat and to use the slab as thermal mass, so the space doesn’t swing hot and cold. For an office or plant room, plan separate heating zones with their own controls, and allow for radiant panels in areas with larger glazed sections where you need a quick response.
Good solar gain helps, but you need to control it. Use sensible orientation, low‑E or solar control glass where needed, plus insulated roof panels to keep heating demand down instead of relying on the boiler. Thermal curtains or insulated internal blinds make a big difference overnight; you can see the temperature hold better when the system’s off, instead of dropping straight to outside levels.
We always check the whole setup with proper calculations or dynamic modelling so the U‑values, glazing spec and heating layout line up with Part L and what you actually want from the room. On completion you get the FENSA certificate number and all the glass specs on the paperwork, so you know exactly what’s been fitted.
Furnishing And Layout
First decide how you actually use the room – main lounge, dining area, home office or more of a garden/plant space – because that affects how we set out the frames, openings and vents. That choice guides where we put fixed panes, openers, trickle vents and door sets, rather than trying to squeeze your furniture round a bad layout afterwards.
We’ll mark out clear zones on the plan: walking routes, main furniture, and access to sockets and radiators. For living and dining rooms, we line up sightlines through the A-rated double glazing so your main seating isn’t staring at a mullion, and we avoid putting large fixed units where solar gain will cook you in summer. Heavier items like bookcases and media walls stay on solid walls, so we’re free to use larger 28mm argon‑filled units elsewhere without worrying about fixing loads.
For a home office, we allow space round desks for chair movement and cable runs, then position opening sashes to give controlled background ventilation without papers blowing off the desk. We tie this in with extra trickle vents where needed and make sure multi-point locking handles and hinges are reachable and don’t foul blinds.
If the room leans more towards a plant or garden space, we look at light levels first. We place full‑height low‑E glazed units on the brighter side, use overhead openers for purge ventilation, and set any floor‑level trickle vents where they won’t be blocked by pots or shelving. Drainage around doors and low thresholds is detailed so watering and condensation don’t sit against the frames.
On every layout we coordinate with heating and electrics so radiators aren’t buried behind new frames and sockets aren’t lost in new reveals. Final drawings show unit sizes, opening directions, glass spec (28mm argon‑filled, low‑E, warm‑edge spacer) and hardware positions. We only order once it all checks out with the structural openings, any steelwork, and M&E runs, and you’ll get the FENSA certificate number on completion with everything recorded against it.
Costs & Value: Conservatory and Glass Extension Price Guide
The easiest way to get a sensible price for a conservatory or glass extension is to split the job into clear parts: frame, glass, base, roof, finishes and labour. We price each item separately – for example, a 28mm argon-filled A-rated sealed unit with low‑E coating and warm-edge spacer costs more than basic glass, but it cuts heat loss and lowers your bills. Frames are costed by material and spec: uPVC with multi-point locking and internally beaded sashes will be cheaper than aluminium, but both can hit the same U‑values if done properly.
Foundations and groundworks usually take a good chunk of the budget. A proper concrete footing, damp‑proof course and insulated base add more up front than a simple slab, but stop cold spots and damp later. We allow separately for drainage, electrics and heating runs so you can see exactly what’s going into the quote and where you might want to spend or save.
On top of the install, it’s worth adding in long‑term costs. Good Q‑LON gaskets, quality hardware and decent roof glazing mean fewer callouts for failed seals or sticking openers over the next 10–20 years. A well‑built A‑rated glass extension with trickle vents and decent ventilation will usually be cheaper to heat than an old polycarbonate lean‑to, and we can give you an idea of the change in heating demand in kWh per year.
We’ll also check the price per m² of floor area against typical local rates for similar conservatories so you can see if a quote is realistic. Solid frames, high‑performance glazing and tidy finishes tend to hold their value better if you come to sell. A properly certified job, with FENSA certificate number on completion, usually makes things smoother for surveyors and buyers.
Planning & Building Rules for Conservatories and Extensions
Once you know roughly what you want to spend and specify – A-rated glass, 28mm argon-filled units, low‑E coatings, trickle vents, the lot – the next step is checking what you’re actually allowed to build. For conservatories and larger glazed extensions, that means looking at the footprint, height, and distance to the boundary against current permitted development rules, not just what fits in the garden.
If the size, position, or style falls outside those limits, you’ll need to put in a full planning application with drawings that show the frames, roof type, and how the new sealed units tie into the existing brickwork. Conservation areas, listed buildings, and old restrictive covenants on the deeds are common reasons councils refuse uPVC frames or ask for specific frame colours and glazing bar layouts, so it’s worth checking those early.
Alongside planning, the job has to meet building regulations on structural safety, insulation, ventilation, drainage runs, and fire escape. For most extensions with a solid roof and A-rated double glazing, that means a proper lintel detail over openings, insulated cavity walls, low‑E glass to keep heat loss within the U‑value limits, and trickle vents sized to the room.
Use a qualified designer or architectural technician to put the drawings together, and an approved inspector or local authority building control to sign off each stage. Pre‑application advice, neighbour consultation, and council decision periods can easily run to a few months, so build those into your schedule before you book scaffolding or order made‑to‑measure frames.
Keep every approval on file – planning decision notice, building control sign‑offs, FENSA certificates for the windows and doors, plus any site inspection reports. We then sequence the work so the base, walls, roof, and final glazing sign‑off all line up with inspections, which avoids tearing anything back out later under an enforcement notice.
Roof & Glazing Options: Glass, Polycarbonate, Tiled & Hybrid
The roof covering on a conservatory or glazed extension isn’t just a finishing touch. It sets the U‑value you can achieve, how much road noise you hear, the size of the rafters we need to fit, and what Building Control will sign off.
Glass roofs are the best option if you want a clear view and good year‑round performance. A 28mm argon‑filled, low‑E, A‑rated sealed unit with a solar control coating will keep U‑values down and cut summer overheating without turning everything dark green or blue. We’ll specify toughened or laminated glass overhead as standard and set out rafter centres to suit the glass sizes and local snow and wind loadings.
Polycarbonate roofs are lighter and cheaper, but you do sacrifice insulation and noise control. Multiwall polycarbonate with taped edges and thermal breaks helps a bit, but it will never match a 28mm argon‑filled glass unit for U‑value or rain noise. We only recommend it now where budget is tight and you accept the extra condensation risk and drumming in heavy rain.
Tiled or solid insulated roofs behave more like a proper extension. A typical build‑up with insulated panels and plasterboard ceiling gives very low U‑values and far better acoustic performance than glass or polycarbonate, so the room is quieter and easier to heat. They’re heavier, so we check the existing frames, steelwork and foundations before we price anything, and we allow for the extra loadings in our Building Control paperwork.
Hybrid roofs mix solid insulated sections with structural glass panels. We use the solid areas to keep U‑values and solar gain under control, then drop in made‑to‑measure glass panels where you want natural light and sky views. This layout helps meet loading limits and Building Regulations without turning the whole space into a dark box.
On every job in [LOCATION], we size the roof and glazing on facts: U‑values, solar gain figures, local wind and snow data, and condensation risk, not just what looks nice on a brochure. You get a FENSA certificate on completion where it applies, and all glass units are factory‑sealed, internally beaded and sealed with Q‑LON gaskets to cut draughts and water ingress.
Frame Materials for Conservatories & Garden Rooms: UPVC, Aluminium, Timber, Composite
The frame material sets the standard for how your conservatory or garden room will perform, look and last. It affects heat loss, span sizes, sightlines and how much upkeep you’ll have over the next 20–30 years.
uPVC is common because it insulates well and is easy to live with. A good uPVC system will use multi‑chamber profiles, steel‑reinforced where needed, with 28mm argon‑filled A‑rated sealed units and Q‑LON gaskets to cut draughts. The trade-off is slightly chunkier sightlines than aluminium, but it keeps costs sensible and maintenance down to a wash down and an occasional hinge spray.
Aluminium is the go‑to if you want slim frames and wide spans, for example large sliding doors or full-height screens. Always use thermally broken sections with polyamide strips, low‑E glass and warm‑edge spacer bars, so you’re not paying to heat the garden. In coastal or industrial areas around the UK, powder‑coated finishes and stainless steel fixings stop corrosion getting a grip.
Timber suits period properties and customers who want a natural finish. Properly treated engineered timber with a factory spray finish, drained and ventilated glazing beads and 28mm units can perform as well as uPVC on U‑values. It does need scheduled checks: light sanding and re-coating every few years, plus making sure sealant lines are intact so moisture doesn’t sit against the wood.
Composite frames combine an aluminium or uPVC outer with an internal timber face. You get the warm look indoors with the weather protection and low maintenance of the external skin. Multi-point locking, internally beaded sashes and trickle vents can be specified the same way as our standard window systems, and every installation is signed off with a FENSA certificate on completion.
Frame choice should follow what the job needs:
- Large roof or wide spans: aluminium or composite systems with reinforced rafters.
- Exposed or coastal site: aluminium or uPVC with marine-grade powder coat or hardware.
- Character property: timber or timber-faced composite to match existing sightlines.
- Low maintenance priority: uPVC or composite with long-life gaskets and factory finishes.
Match the material to your span, exposure, style and the amount of maintenance you realistically want to do, and the rest — glass spec, roof type, ventilation — falls into place more easily.
Making It Year‑Round & Custom: Insulation, Heating, Lighting, Flooring, Contractor Checklist
Creating a conservatory or garden room that feels comfortable in January as well as July means thinking beyond the glass alone. Thermal performance, heating, lighting and flooring all interact, so it pays to plan them as one integrated system. By understanding insulation, airtightness and moisture control, then matching heat sources to calculated losses and choosing finishes that support stable temperatures, you can brief contractors clearly. The next sections unpack these elements in more detail and suggest what to include in a robust specification.
Thermal Insulation Strategies
Thermal performance gets ignored on a lot of conservatory and garden room jobs, then people wonder why the space is freezing in January and boiling in July. We build the heat control into the glass and the frames from the start, so you’re not relying on an electric heater and a fan to make it usable.
We use insulated 28mm sealed units as standard, with argon-filled cavities and A-rated low-E glass to cut heat loss while keeping solar gain under control. Frames are multi-chamber uPVC or thermally broken aluminium, so you don’t get cold spots around the edges that cause condensation and draughts.
For most installs we’re aiming for sensible U-values across the build:
- Roof glass: solar control, self-cleaning, low-E, U-value typically around 1.0–1.2 W/m²K
- Vertical glazing: A-rated, argon-filled, warm edge spacer, about 1.2 W/m²K
- Solid walls/columns: continuous insulation to match or better the main house
The junctions are where a lot of heat is lost, so we spend time on the detailing: foam-filled gaps, Q-LON gaskets to stop draughts, and proper sealing around cills, ring beams and wall abutments. Any fixings that pass through insulated sections are planned to keep thermal bridging down, instead of just screwing through and leaving a cold stripe.
On the warm side we use the right vapour control layers to keep moist air out of cold voids, and we ventilate roof zones so any trapped moisture can escape. That way you avoid interstitial condensation behind plasterboard and don’t end up with stained boards or blown insulation two winters down the line.
All glazing is internally beaded for security, with multi-point locking as standard, and every job in Leeds finishes with a FENSA certificate and registration number so you’ve got proof the thermal performance and installation meet current Building Regulations.
Efficient Heating Options
Once the frames and seals are sorted, the glass needs to pull its weight so the room stays comfortable without cranking the heating. A good A‑rated 28mm sealed unit, argon‑filled with a low‑E coating, will cut heat loss and stop cold spots around the window line. Proper Q‑LON gaskets and fully sealed trickle vents mean you’re not paying to heat draughts.
I size and specify units so they work with how you heat the house, not against it. If you’ve got a heat pump running low‑temperature radiators or underfloor heating, the right low‑E glass and warm edge spacer helps keep that steady background warmth in, so the system isn’t cycling on and off all day. On a standard gas boiler, improved U‑values through modern double glazing let you run lower flow temperatures and still keep the room at set point.
Good glass cuts cold downdraughts off the pane, so radiators can be smaller and sit where they should, not oversized under every window trying to fight heat loss. In south‑facing rooms around Manchester, I’ll usually balance solar gain against insulation, so you don’t end up with overheating in summer and still keep bills down in winter.
On completion you get the FENSA certificate number for Building Regs sign‑off, and I’m happy to run through U‑values and glass specs in plain English so you know exactly what you’re getting for your money in £ and what it will do to your heating demand.
Lighting, Flooring, Contractor Checklist
Insulation and heating give you the base, but the way you handle lighting, flooring and the handover with your contractor decides if that new conservatory or garden room actually works all year. Get the details wrong and you end up with glare, cold spots and flooring that creaks or cups the first winter.
On the electrical side we allow for proper smart lighting circuits, not just a single switch by the door. That means zoned LED downlights, separate feeds for feature lighting, and sensors that work with the A‑rated, low‑E, argon‑filled glass so you’re not fighting daylight with artificial light. All circuits run through RCD protection, with underfloor wiring in conduit at agreed depths so nobody drills through it later.
For flooring, we specify systems that deal with both sound and moisture. That usually means an acoustic underlay, a continuous vapour barrier over the slab, and correct expansion gaps at the perimeter so the finish can move without lifting. In high‑use garden rooms around Manchester, good practice is a moisture‑resistant board over the insulated slab before the final floor covering goes down.
Thermal detailing is just as important as the glass spec. We check junctions where the 28mm sealed units meet frames, ensure slab insulation ties into the wall insulation, and set door thresholds to avoid cold bridging and water pooling. Internally beaded frames with continuous Q‑LON gaskets help keep draughts and noise down once everything is sealed.
Put all of that into a clear contractor checklist so nothing gets missed. At minimum, make sure it covers:
- Electrical: smart lighting circuits labelled, RCDs tested, underfloor wiring routes marked on the as‑built plan
- Flooring: acoustic flooring or underlay confirmed, moisture barrier installed and taped, expansion gaps left and documented
- Thermal: junction details followed, slab insulation thickness checked, door thresholds level and weathered correctly
- Handover: commissioning records for electrics and heating, glass and frame material certificates, maintenance schedule, and your FENSA certificate number handed over on completion
Frequently Asked Questions
How Long Does Installation Typically Take From Start to Finish?
From signing the contract to us handing the keys back, you’re usually looking at around 6–12 weeks. We allow roughly 1–2 weeks for site prep, 2–4 weeks for the structure, then another 2–4 weeks for glazing and finishing, with glass lead times and weather being the big variables. Once the glass is ordered, we’ll give you a firm programme with dates.
Are Conservatories Insurable Under Standard Home Policies?
Yes, most conservatories can be covered under a standard home insurance policy, but they’re usually classed as an upgrade to the property. You’ll want to tell your insurer the frame type, roof material, glazing spec (e.g. 28mm A‑rated argon‑filled units) and who fitted it – ideally FENSA or similar – so the rebuild value and any premium increase are properly worked out.
Can I Relocate a Conservatory to Another Property Later?
Yes, it can be moved, but it’s quite a big job and not always cost‑effective. The frames and roof have to be carefully dismantled, any damaged 28mm sealed units or roof bars replaced, and new foundations and walls built to suit the new site. You’ll also need planning/building control checks and a good installer, as guarantees usually won’t transfer.
What Maintenance Is Required for Different Frame Materials?
uPVC is easy – just wash the frames with mild soapy water every few months, wipe the seals, and give the hinges and locks a light oil once or twice a year. Aluminium’s similar: regular cleaning, check the sealant lines, and tighten any loose screws or handles. Timber needs more care: re-stain or repaint every 3–5 years, look for soft spots or flaking, and replace any rotten sections quickly.
Do Conservatories Affect Home Resale Tax or Council Valuations?
Yes, it can affect things like council tax and the valuation the council holds on record, because you’re adding usable floor area. As long as the conservatory’s properly built with approvals and on the plans, they may reassess based on the extra living space and quality of build, but flimsy, cold structures often make little difference.