Why Is My Conservatory Too Hot in Summer and Too Cold in Winter?
If you live in Plymouth, Devon or Cornwall and your conservatory feels unusable for much of the year, you are not alone.
Many older conservatories become:
- Overheated in summer
• Freezing in winter
• Noisy during rain
• Expensive to heat
This is one of the most common complaints homeowners have about traditional glass or polycarbonate conservatory roofs. Installing a warm roof conservatory can dramatically improve comfort and temperature stability.
This guide explains why this happens and what can be done to fix it.
Why Conservatories Overheat in Summer
Traditional conservatories use:
- Glass roofs
• Polycarbonate roofing
• High glazing ratios
In direct sunlight, especially during South West summers, these materials allow:
- Solar heat gain
• Temperature build-up
• Limited heat escape
In Plymouth and coastal Devon, conservatories can become uncomfortable even on moderately warm days.
Why Conservatories Become Cold in Winter
In colder months:
- Heat rises and escapes through glazed roofs
• Insulation is limited
• Draughts form around frames
• Temperature difference becomes noticeable
Older conservatories often lack sufficient thermal separation from the main property.
This creates a room that is rarely used between November and March.
The Real Problem: Roof Insulation
The main issue is usually not the windows or frames.
It is the roof.
Traditional conservatory roofs offer minimal insulation compared to tiled or insulated systems.
Modern warm roof systems replace the glazed roof with:
- Insulated solid structure
• Tiled external finish
• Plastered internal ceiling
• Integrated lighting
This dramatically improves thermal retention.
What Is a Conservatory Roof Replacement?
Instead of demolishing the entire conservatory, homeowners can replace only the roof structure.
This process involves:
- Removing the existing glass or polycarbonate roof
• Installing insulated structural panels
• Adding tiled external covering
• Plastering the internal ceiling
The result feels more like a true extension than a seasonal space.
Benefits of Replacing a Conservatory Roof
Homeowners across Devon report:
- Year-round usability
• Reduced overheating
• Lower heat loss
• Improved noise insulation
• Increased comfort
In many cases, the conservatory becomes a genuine living room, dining space or home office. Many Devon homeowners choose to replace their conservatory roof with tiles rather than build an extension.
Cost Considerations in Devon (2026)
Typical conservatory roof replacement cost in Plymouth and surrounding areas:
£7,000 – £15,000 depending on size and specification.
While this is an investment, it is usually far cheaper than building a full extension. Before proceeding, it’s worth understanding typical roof replacement cost in Devon.
Coastal Considerations
In exposed areas such as Saltash and Torpoint:
- Wind loading must be considered
• Proper structural anchoring is essential
• Corrosion-resistant components improve longevity
Professional installation ensures structural integrity.
Does a Warm Roof Require Planning Permission?
In many cases, conservatory roof replacement falls under Building Regulations rather than full planning permission.
However:
- Structural calculations may be required
• Compliance must be demonstrated
An experienced installer manages this process.
Frequently Asked Questions
Can I replace my conservatory roof with tiles?
Yes, in most cases, provided the structure can support the additional load.
Will it make my conservatory warmer?
Yes, insulated roof systems significantly improve winter performance.
Will it stop overheating in summer?
Yes, insulated roofs reduce solar heat gain.
Is it cheaper than an extension?
Yes, significantly cheaper in most cases.
Professional Conservatory Roof Replacement in Devon
Stormseal Southwest specialises in insulated conservatory roof replacement across Plymouth, Devon and Cornwall. We assess existing structures carefully to determine suitability for tiled warm roof systems designed for South West conditions.
Our installations include:
- Structural roof assessment
• High-performance insulated roof systems
• Building Regulations compliant installation
• Proper ventilation integration
• Professional sealing and anchoring
• Solutions suitable for coastal exposure
Every installation is carried out by experienced fitters familiar with both modern conservatories and older structures.
Final Thoughts
If your conservatory in Plymouth, Devon or Cornwall is too hot in summer and too cold in winter, the problem is usually the roof. Replacing the roof with an insulated system transforms usability and comfort without the cost of a full extension. A professional survey can confirm whether your existing conservatory structure is suitable for roof replacement.
For homeowners considering a full redesign rather than just roof replacement, explore our complete conservatory installation services in Devon.
Author
Prepared by the Stormseal SW installation team, specialists in conservatory roof replacement and insulated warm roof systems across Plymouth, Devon and Cornwall.
