Plymouth's Conservatory Roof Specialists
Warm Roof Conservatory Plymouth
A warm roof conservatory uses an insulated tiled roof system to replace your old glass or polycarbonate roof, creating a thermally efficient living space that stays warm in winter and cool in summer without excessive heating or cooling costs.
- Warm in winter, cool in summer
- No more leaks or condensation
- Fully insulated tiled roof systems
No pushy sales · Same-day reply · 10-year insurance-backed guarantee
A simple, considered approach.
What Is a Warm Roof Conservatory?
A warm roof is a solid, insulated roof system designed specifically to replace outdated conservatory roofs. Unlike traditional glass or polycarbonate, a warm roof system provides exceptional thermal performance — keeping heat in during winter and blocking excessive solar gain in summer.
The name comes from where the insulation sits: above the rafters. That keeps the entire roof structure warm, which means the inner surface stays close to room temperature — so condensation can't form, the room heats easily and stays warm, and you get a flat plastered ceiling that looks like any other room in the house.
At Southside Better Roofs in Plymouth, we install warm roof systems that transform uncomfortable conservatories into rooms your family will actually want to use, every day of the year.
Why most older conservatory roofs stop working.
Almost every project we visit starts with the same set of complaints.
Too hot in summer
Glass and polycarbonate roofs trap solar heat and make the room unusable.
Too cold in winter
Poor insulation lets warmth escape and pushes up your heating bills.
Leaks & condensation
Aging seals and single-skin roofs let damp in and cause recurring leaks.
Loud during rain
Thin roof materials amplify noise so the room never feels settled.
Why Do Conservatories Need Warm Roofs?
The original roof is the weak point in nearly every existing conservatory. Glass and polycarbonate were never designed to deliver house-like thermal performance — they were designed to be cheap, light and let light through. The consequences are familiar to anyone who's owned one:
- Polycarbonate and glass have very poor insulation values (U-values 2.0–3.0+ W/m²K), leading to extreme temperature swings between summer and winter
- In winter, heat escapes rapidly through the roof — running the heating just feeds the cold sky
- In summer, the greenhouse effect turns your conservatory into an oven, often hitting 40–45°C on sunny days
- Rain noise on polycarbonate roofs can hit 70–80 dB, loud enough to drown out conversation
- Condensation forms on the inside of the cold roof and drips back down, often causing damp patches and mould
- Seals perish, ridge bars corrode and polycarbonate goes brittle in the UV — leaks become inevitable after 10–15 years
Blinds, films, fans and dehumidifiers manage the symptoms but don't fix the cause. A warm roof addresses every problem at source.
A complete insulated warm-roof system.
Engineered to building-reg standards and finished beautifully inside and out.
How Our Warm Roof System Works
Our warm roof system uses lightweight insulated panels with an external composite tile finish. The system is engineered to fit your existing conservatory structure — frame, base and windows stay as they are. Only the roof changes.
- Insulated core — high-performance PIR insulation achieves U-values as low as 0.15 W/m²K, better than a modern house ceiling
- Lightweight tiles — purpose-designed composite tiles at 30–35 kg/m², so existing frames cope without modification
- Internal plastered ceiling — a smooth, finished ceiling that's indistinguishable from any other room in the house
- Integrated lighting — downlights and electrics can be fitted directly into the new ceiling at the time of install (much harder to retrofit later)
- Ventilation — proper ridge ventilation prevents condensation in the roof void and maintains air quality
- Lead flashing — code-4 lead or proprietary flashing at the wall junction, chased into the brickwork properly
Warm Roof vs Glass vs Polycarbonate — Side by Side
How a warm roof actually compares to the two roof types it most often replaces:
| Feature | Warm Roof | Glass | Polycarbonate |
|---|---|---|---|
| U-value | 0.15–0.18 W/m²K | 1.2–2.0 W/m²K | 2.5–3.0 W/m²K |
| Summer temperature | Comfortable | Hot | Very hot (40°C+) |
| Winter warmth | Warm — single radiator | Cold, expensive to heat | Very cold |
| Rain noise | Silent (like a house roof) | Loud | Very loud (70–80 dB) |
| Condensation | Eliminated | Common in winter | Very common |
| Lifespan | 40+ years | 15–20 years (seals fail) | 10–15 years |
| Building Regs | Full sign-off included | N/A (existing) | N/A (existing) |
| Typical cost | from £6,000 | from £6,000 | from £6,000 |
A warm roof costs more upfront than a like-for-like glass or polycarbonate replacement, but it's the only option of the three that actually solves the temperature, noise and condensation problems — and it lasts two to three times longer.
The SupaLite™ Warm Roof System
We're SupaLite specialists. Rather than dabbling in every brand on the market, we've chosen to focus on one system — independently certified through LABC Warranty, the national body governing local-authority building control — and become genuinely expert at fitting it. That means cleaner installs, fewer surprises, and a finish you can rely on.
What makes SupaLite the right choice
- Lightweight engineered structure — designed to fit existing conservatory frames without modification
- High-performance PIR insulation — U-values from 0.18 down to 0.15 W/m²K
- Lightweight composite tiles — Tapco slate, Metrotile or Britmet, all with 40-year manufacturer guarantees
- Flexible internal ceiling — flat, vaulted or coombed depending on your preference
- LABC-approved — full Building Regulations sign-off included
- Suits every shape — lean-to, Edwardian, Victorian, gable and P-shape conservatories
Specialising in one system means our crew can fit it faster, predict the small details that catch generalist installers out, and stand behind every job with full confidence.
What to Expect During Installation — Day by Day
Most warm roof projects take 2–4 days from old roof off to plastered ceiling finished. Here's exactly what happens:
Strip-out & structural prep
Scaffold goes up first thing. We lift off the old glass or polycarbonate panels, strip the ridge bar and remove the old gutters. Existing frames are inspected and any small repairs made. The room is sheeted overnight so it stays watertight.
New roof structure & insulation
Lightweight engineered rafters and the new ridge are fitted, then the SupaLite insulated panels go on. The roof is fully weathertight by the end of the day — even if it rains, you stay dry.
Tiles, lead flashing & guttering
Composite tiles are fixed to the external face, lead flashing is dressed and chased into the brickwork at the wall junction, and new gutters and downpipes are connected up.
Plastered ceiling & finish
Internal plasterboard, skim plaster and any downlights or electrics are completed. We do a full clean-down, take the scaffold away and walk you through the finished room. Building Regs paperwork follows in the post.
Larger Victorian, gable and P-shape conservatories can take an extra day or two, but the principle is the same: one dedicated crew on site continuously, and your home stays watertight throughout.
Before & after — a real Plymouth warm roof project.
Drag the slider to see exactly how a SupaLite warm roof transforms a conservatory inside and out.
Plymouth — old glass conservatory roof replaced with a SupaLite warm tiled roof.
Drag the slider to compare
Four clear steps from first visit to finished room.
Survey
We visit, measure and discuss exactly how you want to use the room.
Specify
A clear written quote — materials, finish and timeline up front.
Install
Old roof off, fully insulated warm-roof system on, by our own crew.
Finish
Plastered ceiling, full clean-down and walk-through with you.
A conservatory you actually want to spend time in.
Cool in summer
No more trapped heat — the room stays comfortable on the hottest days.
Warm in winter
Insulated to modern building-reg standards so you keep the heat in.
10 year guarantee
Insurance-backed guarantee, plus a 40-year guarantee on the tiles.
Fast install
Most projects are completed in just 2–4 days by our own crew.
Benefits of a Warm Roof Conservatory
- Year-round comfort — no more seasonal extremes; usable in January and August alike
- Lower energy bills — superior insulation reduces heating costs significantly; many customers find a single radiator now does the job
- No more condensation — the warm internal surface eliminates the cold spot where moisture used to form
- Quieter living space — solid construction dramatically reduces external noise; rain becomes a soft background sound
- Home value increase — a warm roof transforms a glorified greenhouse into genuine usable living space
- Quick installation — most warm roofs are fitted in 2–4 days with minimal disruption
- Building Regs sign-off — you get the certificate that matters at sale time
Couldn't believe the difference. From freezing to toasty in two days. The new SupaLite roof looks like a proper extension from the garden — neighbours keep asking who built it.
What does it cost?
Honest, typical price ranges so you can plan with confidence — every quote is bespoke after a free home survey.
How Much Does a Warm Roof Conservatory Cost?
Realistic price ranges for the warm roof systems we fit across Plymouth:
- Lean-to (3m × 3m) — from £6,000 fully fitted
- Edwardian / square — from £6,000
- Victorian (3-facet) — from £6,000
- Gable-end / P-shape — from £6,000
- Velux-style roof windows — £450–£650 each, fitted
What's included in the price?
Conservatory shape and size are the biggest factors. Tile choice, the number of skylights and any integrated lighting make a smaller difference. Every quote includes:
- Free home survey and structural assessment
- Full scaffolding for the duration of the project
- Removal and disposal of your old roof
- The complete SupaLite™ insulated warm-roof system
- Internal plastered ceiling, ready to decorate
- New gutters, downpipes and lead flashing
- Building Regulations application and sign-off
- 10-year insurance-backed workmanship guarantee
No hidden extras — the headline price is the price you pay.
Finance & Payment Options
A warm roof is a significant investment, so we keep payment terms flexible and transparent:
- Stage payments — a small deposit secures your install date, with the balance split between start of work and completion. You never pay for work that hasn't been done.
- Spread the cost — interest-free and low-interest finance options are available on most projects through our regulated finance partner. Typical terms range from 12 months interest-free up to 10 years.
- Card or bank transfer — all major payment methods accepted, with full receipts for your records.
- No pressure, no hard sell — we'll talk through the options at the survey and let you decide in your own time.
Plymouth, Devon & Cornwall.
A locally based crew covering the South West — most projects are within 30 minutes of our Barbican workshop.
Warm Roofs Fitted Across Plymouth & The South West
Our crew works across Plymouth and the surrounding South West daily. Recent warm-roof installs include homes in:
- Plymouth — Plymstock, Plympton, Crownhill, Mannamead, Peverell, Mutley, Hartley
- South Hams — Ivybridge, Wembury, Yealmpton, Modbury
- South-East Cornwall — Saltash, Torpoint, Callington
- West Devon — Tavistock, Yelverton
We're a small local crew rather than a national franchise — which means the person who quotes the job is the same person who oversees the install.
Why our warm roof outperforms a traditional conservatory.
Frequently asked questions.
Is a warm roof the same as a solid roof or a tiled roof?+
Yes — 'warm roof', 'solid roof', 'tiled conservatory roof' and 'insulated conservatory roof' all describe the same type of replacement. The phrase 'warm roof' simply highlights its thermal performance: insulation sits above the rafters so the structure stays warm and condensation can't form on the inner surface.
Will my conservatory feel darker with a warm roof?+
Slightly, but most customers prefer it. The harsh overhead glare disappears and is replaced with comfortable ambient daylight through the windows. If you want to keep more light, we fit Velux-style roof windows or glazed feature panels into the new roof — two skylights in a 3.5m × 3.5m roof works really well.
Can any conservatory have a warm roof fitted?+
Almost always, yes. Our lightweight system typically weighs less than the original glass and frame combined, so existing conservatory bases and frames cope without modification in the vast majority of cases. We confirm suitability during the free home survey using a structural assessment of your existing frame.
How much warmer will my conservatory actually be?+
Dramatically warmer. The U-value drops from around 2.0–3.0 W/m²K (glass/polycarbonate) to as low as 0.15 W/m²K — better than most modern house ceilings. Many customers find a single radiator is enough to heat the whole room, and some no longer need any extra heating at all.
How much does a warm roof conservatory cost?+
All conservatory roof replacements start from £6,000 fully fitted, regardless of size or shape. Final cost depends on roof shape, tile finish, number of skylights and any internal finishing. Every quote is bespoke after a free home survey.
What U-value will I get?+
Our standard insulated warm-roof system achieves a U-value of 0.18 W/m²K, with options down to 0.15 W/m²K for premium specifications. For comparison, a typical polycarbonate roof is around 3.0 W/m²K — so the new roof is roughly 15–20× more thermally efficient.
Do I need Building Regulations approval?+
Most warm-roof replacements need Building Regs sign-off because they change the thermal envelope. We handle the application, the build certificate and the building inspector's visit as part of the project — you don't need to do anything beyond signing the paperwork.
How long does the installation take?+
Typically 2–4 days from old roof off to plastered ceiling finished. We work as a single dedicated crew so the job runs continuously and your home stays watertight throughout — even overnight.
Will it stop the rain noise?+
Yes, completely. The combination of insulation, plasterboard and tiles absorbs sound just like a normal house roof — heavy rain becomes a soft background sound rather than the drumming you get on polycarbonate.
Which warm roof system do you fit?+
We fit the SupaLite™ warm roof system exclusively. It's LABC-approved, lightweight, and offers excellent flexibility on internal ceiling finish (flat, vaulted or coombed). We've chosen to specialise in SupaLite because it consistently delivers the best results across the conservatory shapes we see most often in Plymouth — and specialising in one system means our crew installs it faster, cleaner and to a higher standard than installers who switch between brands.
How long does the warm roof last?+
The lightweight composite tiles carry a 40-year manufacturer guarantee and are designed to outlast that comfortably. The whole installation comes with a 10-year insurance-backed guarantee on workmanship.
Got questions?
Straight answers to the things people ask us most.
Free Brochure
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Everything you need to know about our SupaLite™ insulated warm-roof system — tile finishes, internal options, the 2–4 day installation process, prices from £6,000 fully fitted, and our 10-year insurance-backed guarantee.
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