A solid conservatory roof replaces your existing polycarbonate or glass roof with an insulated, tiled structure that transforms a seasonal conservatory into a genuine year-round living space. The conversion costs £6,100-£15,000 depending on size, takes 2-5 days to install, and does not require you to remove the existing conservatory walls or base.
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This guide covers everything you need to know before committing to a solid roof conversion – from costs and energy savings to planning permission, building regulations, and the practical realities of living through the installation. If you are comparing specific brands, see our SupaLite vs Guardian comparison instead.
- A solid conservatory roof costs £6,100-£15,000 installed - a 4x4m Victorian conservatory typically costs £8,000-£12,000 including materials, labour, and Building Regulations
- U-value drops from 1.0-1.5 to 0.15 W/m2K - that is a 6-10x improvement in insulation, cutting conservatory heat loss by up to 90% compared to polycarbonate
- Homeowners report heating bill savings of £200-£500 per year - the conservatory stops acting as a thermal drain on the adjoining rooms
- Building Regulations approval is mandatory but included with branded systems - SupaLite, Guardian, Ultraframe, and WARMroof all handle the LABC application as part of the installation
- A solid roof adds 5-10% to the conservatory’s property value contribution - estate agents value solid-roof conservatories as genuine living space, not a seasonal add-on
What Is a Solid Conservatory Roof Conversion?
A solid roof conversion strips your existing polycarbonate or glass roof. It replaces it with an insulated, tiled structure. The walls, windows, doors, and base all stay in place – only the roof changes. The finished result looks like a natural extension of your house.
Modern systems use lightweight aluminium or timber frames topped with tiles that weigh far less than standard roofing tiles. This matters because your existing frame was built for a lightweight roof. All branded systems (SupaLite, Guardian, Ultraframe, WARMroof) are engineered to work within these structural limits.
The roof has multiple layers: tiles, a ventilation gap, structural decking, insulation (100-150mm thick), a vapour barrier, and plasterboard. This layered construction achieves the 0.15 W/m2K U-value. That makes the room warm in winter and cool in summer.
How Much Does a Solid Conservatory Roof Cost?
A solid conservatory roof costs £650-£1,200 per square metre installed. The total depends mainly on the size and shape of your conservatory. Here is what you can expect to pay.
| Conservatory Size | Approx. Roof Area | Cost Range |
|---|---|---|
| Small lean-to (3x3m) | 9-10m2 | £6,100-£8,500 |
| Medium Edwardian (4x3m) | 12-14m2 | £7,500-£10,500 |
| Standard Victorian (4x4m) | 16-18m2 | £8,000-£12,000 |
| Large P-shape (6x4m) | 24-28m2 | £11,000-£15,000 |
Prices include the roof structure, tiles, insulation, plasterboard, Building Regulations, and waste removal. Optional extras are not included. LED downlights cost from £300, roof windows from £800.
Victorian and Edwardian hipped roofs cost 10-20% more than lean-to designs. The angled sections need more complex tile work. London and the South East are 15-20% pricier than the North. For a full breakdown including glass and hybrid options, see our conservatory roof replacement cost guide.
Energy Efficiency: Solid vs Polycarbonate vs Glass
Energy efficiency is the single biggest reason homeowners switch to a solid roof. The difference in thermal performance between a polycarbonate roof and a solid roof is dramatic – not incremental. Here is how the three main roof types compare.
| Metric | Polycarbonate | Glass | Solid (Tiled) |
|---|---|---|---|
| U-Value (W/m2K) | 1.0-1.5 | 1.0-1.2 | 0.15 |
| Insulation Rating | Poor | Moderate | Excellent |
| Summer Overheating | Severe | Moderate (with solar glass) | Minimal |
| Winter Heat Loss | High | High | Very low |
| Rain Noise | Loud | Moderate | Silent |
| Year-Round Use | 3-4 months | 6-8 months | 12 months |
| Annual Heating Saving | Baseline | £50-£150 vs polycarb | £200-£500 vs polycarb |
A U-value of 0.15 means a solid roof loses one-seventh of the heat that escapes through polycarbonate. In practical terms, a polycarbonate roof acts as a thermal drain. Heat from your main house leaks into the conservatory and out through the roof. A solid roof stops this. That is why heating bills drop even in rooms next to the conservatory.
The exact saving depends on your tariff, how much you heat the conservatory, and its size. On a 4x4m conservatory with gas at current UK rates (roughly 7p/kWh), savings are typically £300-£500 per year.
Does a Solid Roof Add Property Value?
Industry estimates suggest a solid roof adds 5-10% to the conservatory’s contribution to property value. Estate agents class solid-roof conservatories as usable living space. Polycarbonate-roof ones are treated as seasonal outdoor rooms.
In numbers: a £300,000 home where the conservatory adds £15,000 of value could see an uplift of £750-£1,500 with a solid roof. On a £10,000 installation, that recovers 7-15% of the cost through value alone. Energy savings and better liveability are on top of that.
The value argument is strongest for homes in the £250,000-£500,000 range. Buyers in this bracket actively value usable floor space. The impact is smaller for very high-value properties where the conservatory is a tiny percentage of total value.
Note: these are industry estimates, not guaranteed valuations. The actual impact depends on your local market, buyer preferences, and the overall condition of the conservatory and your home.
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Planning Permission and Building Regulations
Most solid roof conversions do not need planning permission. However, they always require Building Regulations approval. These are two separate legal requirements. Confusing them is a common mistake.
Planning Permission
Planning permission is not usually needed for a roof replacement. This applies as long as you keep the same footprint, height, and appearance. Exceptions apply for listed buildings, conservation areas, and restrictive covenants. If in doubt, get a Certificate of Lawful Development (around £100) from your council.
Building Regulations
Building Regulations approval is mandatory for every solid roof conversion. You are replacing a lightweight roof with a heavier structure. This changes the loading on the frame and foundations. An inspector must verify structural safety, thermal performance, fire compliance, ventilation, and electrics.
All four major systems include Building Regulations in their price through LABC partnerships. Your installer submits the application. The inspector visits during and after installation. You get a completion certificate once the work passes. This certificate is essential for selling your home later.
If you use a non-branded or independent installer, you may need to arrange Building Regulations approval separately (around £250-£400). Always confirm whether building control is included in any quote.
How Long Does Installation Take?
Most solid roof installations take 2-5 days. The exact timeline depends on your conservatory’s size and which system you choose. Ultraframe is the fastest (watertight in 6 hours, done in 1-3 days). SupaLite and Guardian typically take 3-4 days.
Here is what to expect during the installation process:
| Day | What Happens |
|---|---|
| Day 1 | Existing roof stripped, old materials removed, structural frame fitted |
| Day 2 | Insulation, decking, and weatherproofing layer installed – roof is watertight |
| Day 3 | Tiles fitted, ridge capping, flashings sealed to house wall |
| Day 4 | Internal plasterboard and skim, electrics (downlights if ordered) |
| Day 5 | Finishing touches, cleanup, Building Control inspection (if scheduled) |
Your conservatory will be unusable during the work. The room next to it may get dusty. The roof is usually watertight by end of day 2, so rain mid-project is low risk. Most installers will not start if heavy rain is forecast for the first two days.
Maintenance and Lifespan
A solid roof is one of the lowest-maintenance home improvements you can make. Polycarbonate discolours after 10-15 years. Glass needs regular cleaning. A tiled roof needs almost no attention once fitted.
Tiles: Lightweight tiles last 30-50 years. They do not discolour, warp, or degrade in UV light. Occasional moss in damp, shaded areas can be treated with a spray.
Guttering: Check gutters annually and clear leaves or debris. This is the same maintenance you do on your main house roof and takes 10 minutes.
Interior: The plasterboard ceiling can be repainted as needed, just like any other ceiling in your house. There is no special maintenance required.
Structure: The frame requires no maintenance. All branded systems are designed to be maintenance-free for the warranty period (10-25 years depending on brand).
Pros and Cons of a Solid Conservatory Roof
A solid roof is the best option for year-round comfort and energy efficiency, but it involves trade-offs – particularly around natural light and upfront cost. Here is an honest assessment.
Want insulation without losing light? Consider a hybrid roof at £5,500-£13,500. It combines solid panels with glazed sections. See our conservatory roof replacement cost guide for all roof types. For installer recommendations, see our best conservatory companies guide.
Solid Roof vs Glass and Polycarbonate
Solid (tiled) roofs are not the only option for replacing an existing conservatory roof. The choice between solid, glass, and polycarbonate depends on how you use the room and what you spend on running costs each year.
- Solid (tiled): £5,500–£14,500 fitted. U-value 0.15–0.18. Year-round usable. Best resale value uplift.
- Glass: £2,000–£15,000 fitted. U-value 1.0–1.6. Keeps bright garden-room feel. See glass conservatory roof cost guide.
- Polycarbonate: £1,200–£3,000 fitted. U-value 1.8–3.0. Cheapest but being phased out. Yellows over 10–15 years.
For the full 3-way comparison see our tiled vs glass vs polycarbonate guide. For the property value uplift on each option, see our conservatory roof house value guide. If your existing roof has problems, our conservatory roof problems guide covers repair vs replace.
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