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The BEST Warm Roof System for Year-Round Comfort
Discover Prefix WARMroof® – our flagship, award-winning solid roof system. Engineered for exceptional thermal performance, this highly insulated system meets the latest Building Regulations, delivering all-year comfort. A fully configurable system with a wide choice of tile finishes, and hybrid glazing upgrades, Prefix WARMroof® ensures both style and energy efficiency. Whether you’re upgrading an existing conservatory or creating a year-round living space, WARMroof provides a robust, structurally sound solution backed by Prefix’s trusted trade support and expertise.
What is the WARMroof System?
The Prefix WARMroof® is our award-winning, lightweight, insulated tiled, solid roof designed for a conservatory roof replacements and home extensions. An incredibly versatile system – no matter what shape or size you need, there’s a Prefix WARMroof® for you.
A TRUE Warm Roof
The Prefix WARMroof® system features an extra 70mm top panel phenolic insulation which insulates the bars and eliminates potential thermal bridging issues creating a true ‘warm roof’ structure and provides 0.15 ‘U value’ to comply with UK building regulations
Benefits of WARMroof for Trade Installers
- Easy, fuss free, fast installation
- Unique A frame construction sets out the eaves position quickly & accurately
- Ridge free design eliminates he need for a ridge body
- Velux pre-fitted before arriving to site
- No battening required
- Palletised deliveries for efficient handling
- Configurable – we can achieve almost any design
- Thermally efficient & Stroma approved (0.18W/m²K or 0.15W/m²K for Scotland)
- On site assistance for first installations
- Technical, sales & marketing support available
Top Cap Cover
Tile Options
Breathable Waterproof Membrane
70mm Top Panel Insulation
15mm Plywood Base Panel
100mm Base Insulation
Gutter
Fully Insulated Eaves
Download the system view below
Design options
Explore our range of tile colours. Choose from one of our stock tiles; Envirotile, Tapco & Britmet or you can choose a slate or tile to match the existing house as the Prefix WARMroof® is structurally tested & proven to cater for any option.
Envirotile
The Lightweight Envirotile is a precision-made recycled polymer roof tile with excellent eco credentials. The ideal choice for a simple but high performance conservatory roof, with a 25 year warranty and 4 stylish colours to choose from.
Anthracite Black
Slate Grey
Dark Brown
Technical details
The Lightweight Envirotile is very versatile. It is extremely simple to fix yet performs exceptionally, locking into adjacent tiles to form a fully integrated roof covering. It is suitable for all buildings including conservatory replacements due to the lightweight design and low pitch capability. Lightweight tiles perform to roof pitches as low as 12.5 degrees.
- 25% quicker to install
- 80% lighter than concrete tile
- Extremely robust
- Minimal breakages
- Environmentally sustainable
Britmet Liteslate
Introduced to the market in May 2019, Britmet’s Liteslate is our innovative synthetic slate roofing tile made from 90% recycled polymers with all the characteristics you can expect from a traditional slate tile. Liteslate offers an authentic finish with riven edges, traditional colour choices and impeccable durability.
Charcoal
Ash
Slate
Oak
Amethyst
Sunshine
Sunset
Technical details
- Min. pitch: 12°
- Max. pitch: 90°
- Overall width: 297mm
- Overall height: 445mm
- Batten gauge: 152mm-191mm
- Roof cover per plate: 0.06sqm
- Slate per sqm: 18-22
- Weight as laid per sqm: 12kg
- Ridge: 5.5 per linear metre
- Hip: 5.5 to 6.5 per linear metre
- Material: Recyclable blend of Polypropylene &Limestone
- Fire resistance: BS476 part 3
Tapco Slate
Tapco Slate Tiles are identical to natural slate in their appearance so are the perfect choice for an authentic, detailed roof design. Tapcoslate tiles are moulded from real slate tiles but unlike natural slate, they will not break or delaminate. You can achieve both high performance and charming character with Tapcoslate.
Stone Black
Pewter Grey
Plum
Brick Red
Chestnut Brown
Red Rock
Technical details
Tapcoslate tile is a mixture of limestone and PVC and provides a lightweight alternative to traditional slate which is easy to cut and work with on site without compromising performance.
- Dolomite limestone material
- 80% lighter than concrete tile
- Lightweight, easy to handle
- Fix by hammer or nail gun
- AA fire rating
- Marked with exposure guides
- 40-year Warranty
Prefix WARMroof® Hybrid
The Prefix Hybrid option features a stylish full length glass panels to let even more light into the room. It’s the only triple glazed full ridge to eaves glass roof light incorporated into a warm roof.
Features
- 28mm double glazing as standard with the option to upgrade to 44mm triple glazing
- Configurable roof pitches
- Unrestricted projection for Gables, Victorian, Georgian (subject to adequate side wall design)
Up to 44mm glass panels
Variable glass panel positions
Ridge to Eaves glass
Frequently Asked Questions
What makes Prefix WARMroof® different?
The Prefix WARMroof® is our award-winning, lightweight, insulated tiled, solid roof designed for a conservatory roof replacements and home extensions. An incredibly versatile system – no matter what shape or size you need, there’s a Prefix WARMroof® for you.
Is Prefix WARMroof® suitable for existing conservatories?
Yes! Our WARMroof® has been designed for conservatory roof replacements with access to our unique retrofit posts which have been designed to be fitted into existing conservatories to provide structural support when upgrading to a heavier roof if the frames cannot support it.
Can I get Prefix WARMroof® in different finishes?
Yes – choose from a range of tile colours & finishes – get in touch with our team for more information.
We would definitely recommend the Prefix WARMroof® system as it’s provided such a great living space for us to enjoy. It is much cooler in the warmer months whereas it used to be unbearable and it now feels like a real part of the house.
Visit Our Case Studies Page For More...
At Conservatech Home Improvements Ltd, we believe our customers deserve the very best - both in product quality and long-term performance. That’s why every single Warm Roof installation we carry out uses the award-winning WARMroof system from Prefix Systems. Prefix have set the benchmark in the industry for innovation, structural integrity, and thermal performance. Their WARMroof is engineered to deliver exceptional insulation while still allowing us to integrate Hybrid Climate Glass panels that flood extensions with natural light - exactly what our customers want. What sets Prefix apart is their uncompromising attention to detail. Every component is precision-manufactured, every joint engineered for longevity, and every roof system rigorously tested. The result is a warm, comfortable, quiet living space that looks stunning and performs flawlessly all year round.
T & J Conservatories
Prefix’s WARMroof has become our go-to solid roof system as it delivers every single time. The build quality is excellent, the components fit perfectly, and installation is smooth every time, speeding up our installations. My team love to fit it and our customers love the comfort and finish, and we’ve had nothing but great feedback. For any trade installer looking for reliability and a premium result, WARMroof is a fantastic choice.
Bryant & Carins
At Bryant and Cairns, we’re proud to offer the WARMroof solid roof system - a product we believe truly leads the way in our industry. Over the years, our customers have told us how much they value the award-winning design and exceptional performance this system brings to their homes. With WARMroof, homeowners can enjoy remarkable thermal efficiency, ensuring their conservatory or extension remains comfortable no matter the season. Its robust, prefabricated build means we’re able to install quickly and efficiently, all with minimal disruption to our clients. The fully ventilated system is designed to prevent condensation for lasting peace of mind, and its versatile, contemporary design can be designed to fit with virtually any property style. From an installer perspective, we know that once we’ve installed a WARMroof, it’s rare we ever need to come back - these roofs are built to last, and our customers enjoy the results without any ongoing hassle.
Get a Quote for a WARMroof
Get a quote from leading WARMroof suppliers for your next trade project.
Eric
Managing Director @ Conserv-a-tech