Woman in a white dress walking through a garden beside a sunroom extension.
Woman in a white dress standing in a garden beside a sunroom extension.
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RESCUE YOUR CONSERVATORY

Too Hot in July. Too Cold in January. Fixed.

Swap your tired polycarbonate roof for a modern insulated or glass roof — and turn your conservatory into a real room for all seasons.

Builders & installers - supply-only pricing available, trade welcome.

Warm in winter, cool in summer
U-values from 0.18 W/m²K on tiled roof.
Full-build by trusted partners
Roof + plastering + electrics handled by one team.
Plaster-ready internal ceiling
Spot lights, cornicing, even skylights.
Free no-obligation site visit
We will show you our portfolio on the visit.
Part L ready - the reason this upgrade transforms your room
The typical old polycarbonate conservatory roof has a U-value of around 2.8 W/m²K - four times worse than current Part L standards. That is why your conservatory is freezing in January and baking in July. Our replacement tiled roofs come in at 0.18 W/m²K - sixteen times more thermally efficient - while our insulated glass lanterns hit 1.0 W/m²K.

Because the replacement roof falls under
the Class 7 exemption for most conservatories, it is a straightforward upgrade that does not need planning permission, but we always verify with your local authority first. We project-manage the whole build - roof, plastering, electrics, skylights - with our trusted partner builders. One team, one guarantee.
Free, No-Obligation
Get Your Free Quote Today
Prefer to chat? Call 0330 043 6212 or WhatsApp +44 7538 781235.
Your details
Full name *
Phone Number *
Email *
Postcode *
First line of address *
Your choices - pick one per row
Home owner or builder / installer?
Homeowner
Builder / Installer
Supply only or supply & fit?
Supply only
Supply & fit
Double glazed or triple glazed?
Double
triple
Property - residential or commercial?
Residential
Commercial
Aluminium or uPVC?
Aluminium
uPVC
Colour & thermal preferences
SIZE: Width
Size : Height
PANE/LEAF:
RAL colour preference (frames)
Handle & hinge colour
Style: [View from Outside]
Tick any that apply - we will factor them into the quote
Book a free site visit
Preferred date & time
DD / MM / YYYY
Or pick a free slot in our live calendar:
Calendly booking page
(syncs with Google Calendar).
When does the project start?
Planned start date
DD / MM / YYYY
Anything else we should know?
Send photos of the opening
Scan the QR code with your phone camera, then send photos and videos on WhatsApp — it's the fastest way to price your project.
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Why choose us
Ten reasons homeowners, builders and architects pick Glazed Window Systems
1
Insulated tiled roof
0.18 W/m²K - warmer than most house roofs. Lightweight composite tile.
2
Glass lantern option
Full glass lantern for a light-filled feel with Part L compliance.
3
Hybrid tile + lantern
Tiled perimeter with central glass lantern - best of both.
4
Plaster-ready ceiling
Finished internally with vaulted plaster, ready for decoration.
5
Spot lights & skylights
LED spots in the vaulted ceiling, optional Velux skylights.
6
Quieter in rain
Tiled roof kills the drum sound by 90%.
7
Existing frame retained
We normally keep your existing walls and windows - saves you thousands.
8
Single-team build
Roof + plasterer + electrician - coordinated by us.
9
10-year guarantee
Structural tiles and glazing unit - 25-year service life.
Real photography
Real conservatory roof conversions
Before-and-after projects where a tired polycarbonate roof has been swapped for a warm tiled, glass lantern or hybrid replacement. All photographed on bright summer days to show the internal light.
Tiled roof with central glass lantern - warm, quiet and light-filled, with a plastered vaulted ceiling inside.
Most projects keep the existing walls and frames and just change the roof - a fraction of the cost of a full extension.
Tiled perimeter plus skylights gives year-round comfort without losing the feeling of a light, airy space.
Buyer's guide
making your conservatory usable again
A lot of UK homeowners have a conservatory they stopped using. Too hot in July. Too cold in January. Too noisy when it rains. Too faded from years of summer sun. The good news is you do not have to knock it down. A new roof on the old walls gives you back a real room for a fraction of the cost of a full extension. Here is how it works.
1
Three roof options
A typical single-storey rear extension runs 12 to 16 weeks on site. Design and approvals before that take 8 to 12 weeks depending on your council. We give you a written programme up front and staged payments that follow the build, never run ahead of it.
2
Which option suits you?
Most extensions are designed first and glazed as an afterthought — then the client discovers the spans need steel they didn't budget. We design the other way round: decide the glass moments first (the bifold wall, the lantern, the picture window), then build the structure to carry them. The result is more light for the same money.
3
Do I need planning permission?
If the conservatory faces south and cooks in summer, go tiled. You can always add small Velux skylights for natural light. If it faces north and is already dark, go glass lantern to maximise the light. If it is east or west facing and you love the sky view, go hybrid.
4
How long does it take?
Most conservatory roof replacements fall under the Class 7 exemption in the Building Regulations. That means no planning permission as long as the conservatory itself was legally built and the footprint does not change. We always verify with your local authority first to be safe.
5
What about the existing walls?
A typical 3 m by 4 m conservatory takes 2 to 4 days on site depending on roof type. Tiled roofs are slightly longer because of the internal plastering. Glass lanterns can often be fitted in 1 day once delivered. We coordinate every trade - structural checks, roofers, plasterers, electricians - so you only talk to us.
6
What about the ceiling inside?
In 95 percent of cases we keep the existing walls and windows. They are fine structurally and any thermal weakness is mostly in the old roof. On the rare occasion the walls have decayed we can price rebuild options as part of the visit.
7
How much does it cost?
A tiled replacement roof has a fully plastered vaulted ceiling inside, ready to paint. We install LED spotlights as standard - usually 4 to 8 depending on room size - plus an optional loft hatch for cable runs. Cornicing, skirting returns and decorative trims are all possible.
8
Tiled, glass or hybrid — which roof is right?
A tiled replacement roof has a fully plastered vaulted ceiling inside, ready to paint. We install LED spotlights as standard - usually 4 to 8 depending on room size - plus an optional loft hatch for cable runs. Cornicing, skirting returns and decorative trims are all possible.
9
Why the roof is nearly always the problem
Book a free site visit using the form above. We arrive with laminate samples of the tile roof system, printed photos of recent jobs, and the iPad portfolio. We measure everything, talk through options with you, and give you a written quote in the same visit or within 24 hours. Nothing to pay until you sign the order.
10
Will my old frames take the new roof?
A tiled replacement roof has a fully plastered vaulted ceiling inside, ready to paint. We install LED spotlights as standard - usually 4 to 8 depending on room size - plus an optional loft hatch for cable runs. Cornicing, skirting returns and decorative trims are all possible.
11
How disruptive is the swap?
Far less than people fear. The old roof comes off and the new one goes on in two to five days, weather managed throughout. You lose the room for under a week and get it back for every week after.
12
What happens next?
Tiled replacement roofs start from about £6,500 for a small lean-to conservatory up to £15,000+ for larger P-shape and gable-front roofs, fully installed and plastered. Glass lanterns start lower for the glazing unit but the price depends heavily on size and lantern complexity. Hybrid sits in between. We give fixed written quotes with no hidden extras.
Bifold Door FAQs
Everything You Need to Know About Our Conservatory
1
Do I need planning permission for a new conservatory roof?
Usually not — most swaps are permitted development; we confirm before ordering.
2
Will a tiled roof make the room dark?
Add a lantern or roof windows — the hybrid option — and it stays bright.
3
What about condensation?
A properly insulated and ventilated new roof ends the drips, not causes them.
See it in action
Before and after - a real conservatory roof conversion
See a 1990s polycarbonate conservatory transformed into a usable, year-round room with a lightweight tiled roof and central glass lantern. Three days start to finish.
Woman in a white dress walking through a garden beside a sunroom extension.
Woman in a white dress standing in a garden beside a sunroom extension.
White left-pointing arrow icon on a dark background.
White right-pointing arrow icon on a dark background.
Projects
Recent installations
A small selection of recent work. Ask for our full portfolio on your site visit.
Edwardian conservatory, Solihull
Full tiled roof + 2 Velux windows
Victorian conservatory, Edgbaston
Hybrid tile + central glass lantern, 2 m x 3 m
Bright living room and dining area with a glass roof lantern and sliding doors opening to a garden.
Self-build, Shrewsbury
Full glass lantern replacing polycarbonate
A brick home extension with a glass roof lantern and open doors.
Gable-front conservatory, Lichfield
Tiled roof with spot lights and plastered ceiling
Open-plan living space with bifold doors opening to a garden patio.
Orangery, Shropshire
Tiled perimeter + 1.8 m x 1.2 m lantern
Spacious living and dining room with dual skylights, wooden floors, and a fireplace.
P-shape conservatory, Birmingham
Hybrid roof - tiled + 2 side lanterns
Your builder can fit them - or we will
Supply-only to trade (trade pricing, full technical pack) or a white-glove install by our in-house team. Your choice at checkout.
GET My Quote
What clients say
Trusted by homeowners & builders across the UK
"We had not used our conservatory in 6 years - too hot or too cold. After the tiled roof replacement we eat dinner in there every night. Best money we have ever spent on the house."
Margaret B.
Homeowner, Solihull
"GWS project-managed the whole thing - new roof, plastering, electrics, spot lights. Three days, no mess, and the price was half of building a new extension."
Raj & Priya K.
Homeowner, Edgbaston
"The glass lantern replacement was a transformation. You would never know it used to be a polycarbonate box. The light is incredible and the room is finally quiet in the rain."
Sam W.
Homeowner, Harborne
Residential or Commercial
We can extend, build roof lanterns, and rebuild from the ground up
If the walls and base of your conservatory are past their best, we partner with trusted builders to rebuild the whole thing - or convert it to a proper full extension. Roof lanterns to add drama to a flat-roof extension. Full glass boxes for a modern addition. Whatever shape your ambition, we can build it.
See extensions page
Handles, Hinges & Locks
Premium hardware, colour-matched to every frame
Each door and window is finished with market-leading hardware multi-point locking, TS007 3-star anti-snap cylinders, stainless-steel  running gear, concealed hinges, and a full range of lever, pull and  key-operated handles. Hover any handle to see it enlarge. Mix and match  to suit your home or project.
Lever - Anthracite
Lever - Anthracite
Smooth ergonomic lever in Anthracite Grey (RAL 7016M) - our most-specified door handle.
Lever - Matt Black
Lever - Matt Black
Matt Black lever for contemporary, architectural looks. Pairs with any frame colour.
Lever - White
Lever - White
Bright White lever for classic, clean interiors and traditional homes.
Lever - Polished Chrome
Lever - Polished Chrome
Polished Chrome lever - a timeless shine that suits modern and classic doors alike.
Lever - Satin Silver
Lever - Satin Silver
Satin Silver lever for a soft brushed finish that hides fingerprints.
Lever - Brushed Gold
Lever - Brushed Gold
Brushed Gold lever for a warm, premium statement. Gorgeous with Anthracite frames.
Quadra - Anthracite
Quadra - Anthracite
Square-edge contemporary lever in Anthracite Grey - clean architectural lines.
Quadra - Matte Black
Quadra - Matte Black
Matte Black square-edge lever - the ultimate modern door handle.
Quadra - Matte White
Quadra - Matte White
Matte White square-edge lever - fresh, bright, contemporary.
Quadra - Polished Chrome
Quadra - Polished Chrome
Polished Chrome square-edge lever for a mirror finish that lifts any door.
Quadra - Satin Silver
Quadra - Satin Silver
Satin Silver square-edge - subtle brushed sheen, easy care.
Quadra - Brushed Gold
Quadra - Brushed Gold
Brushed Gold square-edge lever - on-trend warm metal tone.
Window - Anthracite
Window - Anthracite
Espagnolette window handle in Anthracite Grey. Key-lockable option.
Window - Black
Window - Black
Black inline window handle - sleek and timeless. Child-safety key option.
Window - White
Window - White
White window handle for traditional and modern casements alike.
Window - Polished Chrome
Window - Polished Chrome
Polished Chrome window handle - a classic finish for any room.
Window - Satin Silver
Window - Satin Silver
Satin Silver window handle - a calm, practical, brushed finish.
Window - Brushed Gold
Window - Brushed Gold
Brushed Gold window handle - a beautiful accent on heritage windows.
Lift & Turn - White
Lift & Turn - White
White lift-and-turn handle - simple, strong, classic.
Lift & Turn - Chrome
Lift & Turn - Chrome
Chrome lift-and-turn handle - glossy, durable, easy clean.
Lift & Turn - Satin Silver
Lift & Turn - Satin Silver
Satin Silver lift-and-turn handle - brushed finish for a modern look.
Lift & Turn - Brushed Gold
Lift & Turn - Brushed Gold
Brushed Gold lift-and-turn handle - a warm luxury statement.
Lift & Turn - Anthracite
Lift & Turn - Anthracite
Heavy-duty lift-and-turn handle for patio sliders and bifold traffic leaves.
Lift & Turn - Black
Lift & Turn — Black
Black lift-and-turn handle - gym-grade multi-point gearing.
Lift & Turn — Jet Black
Lift & Turn — Jet Black
Deep matt black lift-and-turn for sliders and bifold traffic leaves.
Lift & Turn — Brushed Gold
Lift & Turn — Brushed Gold
Warm metallic statement handle for premium sliding doors.
Lift & Turn - Satin black
Lift & Turn - Satin black
Soft-sheen black that hides fingerprints on busy doors.
Lift & Turn — Anthracite Grey
Lift & Turn — Anthracite Grey
Colour-matched to RAL 7016 frames for a seamless look.
Rondo keyed handle
Rondo keyed handle
Child-safe keyed window handle - ideal for upstairs bedrooms and rentals.
Pull handle suite
Pull handle suite
Matching pull handle and escutcheon for entrance doors - bold or minimalist.
Concealed 3D hinges
Concealed 3D hinges
Hidden when closed — adjustable in three planes for a perfect reveal for life.
Multi-point locking
Multi-point locking
Anti-snap TS007 3-star cylinders, hook bolts and deadlocks on every door as standard.
Colour Range
Over 200 colours — powder-coated, textured & gloss
Hover over any swatch to see its RAL code. We finish every frame to order — matt, gloss, metallic or textured. Can't see your shade? Any RAL is available.
Anthracite Grey
RAL 7016M
Deep Black
RAL 9005T
HIPCA White
RAL 9910HG
Pastel Green
RAL 6019
Agate Grey
RAL 7038
Jet Black
RAL 9005M
Slate Grey
RAL 7015
Basalt Grey
RAL 7012
Light Grey
RAL 7035
Silver Grey
RAL 7001
Fir Green
RAL 6009
Moss Green
RAL 6005
Chocolate Brown
RAL 8017
Oxide Red
RAL 3009
Sapphire Blue
RAL 5003
Steel Blue
RAL 5011
Cream
RAL 9001
Sand Beige
RAL 1011
Anthracite Textured
RAL 7016 Matt T
Jet Black Textured
RAL 9005 T
Brushed Silver (Tex)
DB 701 T
Pewter (Textured)
RAL 7037 T
Brushed Bronze
DB 703 T
Olive Bronze
DB 604 T
Gold Metallic
AY 1050
Brushed Aluminium
AY 2050
Graphite Pearl
AY 900 M
Any RAL or BS colour available to order — just ask. Dual-colour (different inside / outside) supported on all ranges.
Explore the Range
More ways we transform homes & builds
Versatali Bifold Doors
Versatali Bifold Doors
Slim aluminium folding doors, huge glass spans, Part L ready. Supply or fit.
U-Value
1.1 W/m²K
Rating
A-B WER
Security
PAS 24
Explore bifolds
Front & Panel Doors
Front & Panel Doors
Bank-vault secure, optional ekey fingerprint entry, 120+ panel designs.
U-Value
1.1 W/m²K
Rating
A-B WER
Security
PAS 24
Explore front doors
Aluminium Windows
Aluminium Windows
Flat-flush modern casements, any configuration, 25% more glass than uPVC.
U-Value
1.1 W/m²K
Rating
A-B WER
Security
PAS 24
Explore windows
Heritage Windows
Heritage Windows
Authentic astragal bars, period look, modern Part L performance.
U-Value
1.1 W/m²K
Rating
A-B WER
Security
PAS 24
Explore heritage
Glass Internal Doors
Glass Internal Doors
Bifold, sliding or pivot. Open-plan when you want it, quiet when you do not.
U-Value
1.1 W/m²K
Rating
A-B WER
Security
PAS 24
Explore internal doors
Conservatory Roof Replacement
Conservatory Roof Replacement
Tiled, glass lantern or hybrid - reclaim your conservatory as a year-round room.
Roof U-value
from 0.15 W/m²K
Options
Tiled, glass or hybrid
Fitted
PAS 24
Explore roof replacement
Kitchen Extensions
Kitchen Extensions
Full-build rear and side extensions with trusted partner builders - concept to keys.
Build time
12–16 weeks
Service
Concept to keys
Glazing
Part L ready
Explore extensions
Phone Glazed Windows
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Glazed Window Systems
About Us
We specialise in premium glazed doors and windows, combining modern design with lasting durability to enhance residential and commercial spaces across the UK. Crafted with precision and built to perform, our products bring light, style, and value to every project.
Contact Us
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Glazed Window Systems Limited
Flexspace Unit 12, Middlemore Road, West Bromwich, Birmingham, B21 0BN
© 2025 Glazed Window Systems Limited. All rights reserved.
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