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.
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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.
"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.
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
Smooth ergonomic lever in Anthracite Grey (RAL 7016M) - our most-specified door handle.
Lever - Matt Black
Matt Black lever for contemporary, architectural looks. Pairs with any frame colour.
Lever - White
Bright White lever for classic, clean interiors and traditional homes.
Lever - Polished Chrome
Polished Chrome lever - a timeless shine that suits modern and classic doors alike.
Lever - Satin Silver
Satin Silver lever for a soft brushed finish that hides fingerprints.
Lever - Brushed Gold
Brushed Gold lever for a warm, premium statement. Gorgeous with Anthracite frames.
Quadra - Anthracite
Square-edge contemporary lever in Anthracite Grey - clean architectural lines.
Quadra - Matte Black
Matte Black square-edge lever - the ultimate modern door handle.
Quadra - Matte White
Matte White square-edge lever - fresh, bright, contemporary.
Quadra - Polished Chrome
Polished Chrome square-edge lever for a mirror finish that lifts any door.
Satin Silver lift-and-turn handle - brushed finish for a modern look.
Lift & Turn - Brushed Gold
Brushed Gold lift-and-turn handle - a warm luxury statement.
Lift & Turn - Anthracite
Heavy-duty lift-and-turn handle for patio sliders and bifold traffic leaves.
Lift & Turn — Black
Black lift-and-turn handle - gym-grade multi-point gearing.
Lift & Turn — Jet Black
Deep matt black lift-and-turn for sliders and bifold traffic leaves.
Lift & Turn — Brushed Gold
Warm metallic statement handle for premium sliding doors.
Lift & Turn - Satin black
Soft-sheen black that hides fingerprints on busy doors.
Lift & Turn — Anthracite Grey
Colour-matched to RAL 7016 frames for a seamless look.
Rondo keyed handle
Child-safe keyed window handle - ideal for upstairs bedrooms and rentals.
Pull handle suite
Matching pull handle and escutcheon for entrance doors - bold or minimalist.
Concealed 3D hinges
Hidden when closed — adjustable in three planes for a perfect reveal for life.
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
Slim aluminium folding doors, huge glass spans, Part L ready. Supply or fit.
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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.