The Leka roof system is a patented lightweight tiled conservatory roof that weighs just 33 kg per square metre - one of the lightest systems available. As certified Leka installers in Liverpool, we fit this building regulations-compliant system that achieves U-values as low as 0.15 W/m2K. The Leka system transforms conservatories into genuine year-round living spaces with authentic tile appearance and exceptional thermal performance. Request a free survey to see how the Leka system suits your property.
What Is the Leka Roof System?
The Leka roof system is a purpose-engineered conservatory roof replacement that uses a patented aluminium and composite sub-frame with lightweight tiles. Designed specifically for conservatory structures, the Leka system addresses the weight limitations that prevent standard roofing materials from being used on conservatory frames.
The system was developed to provide a tiled conservatory roof that existing conservatory frames support without structural modification. At 33 kg per square metre (including tiles, insulation, and internal lining), the Leka system is 40% lighter than traditional timber-framed alternatives. This weight advantage makes it suitable for the widest range of existing conservatory structures.
Every Leka roof system installation meets building regulations. The system carries LABC (Local Authority Building Control) registered certification, simplifying the approval process for homeowners.
What Are the Technical Specifications of the Leka System?
The Leka roof system delivers measurable performance across 5 key technical areas.
Weight: 33 kg per square metre complete (sub-frame, insulation, membrane, battens, tiles, and internal plasterboard). This compares to 55-75 kg/m2 for traditional timber-framed tiled roof systems.
U-value: 0.15 W/m2K as standard with 100 mm PIR insulation. This exceeds current building regulations requirements (0.18 W/m2K maximum) and reduces heat loss by up to 90% compared to polycarbonate roofs. Learn more about how this compares to other approaches on our conservatory roof insulation page.
Wind resistance: Tested to withstand wind speeds up to 130 mph. The aluminium sub-frame and mechanical tile fixings provide structural integrity in exposed locations.
Load capacity: Engineered to support snow loads of 0.6 kN/m2, meeting UK requirements for all regions including northern England and Scotland.
Fire rating: The Leka system achieves a Class 0 fire rating on internal surfaces. The aluminium sub-frame is non-combustible. Insulation materials meet fire safety standards required by building regulations.
How Is the Leka Roof System Installed?
Leka roof system installation follows a 5-stage process over 4 to 5 working days. Each stage builds on the previous one to create a weatherproof, insulated, and finished conservatory roof. For homeowners considering a full internal fit-out alongside the roof, our conservatory roof conversion service covers plastering, electrics, and complete room finishing.
Stage 1 - Removal (Day 1): Existing polycarbonate or glass panels are removed. Glazing bars and old seals are stripped. The existing ring beam and wall plate are inspected and prepared for the new system.
Stage 2 - Sub-frame (Day 2): The Leka aluminium sub-frame is assembled and fixed to the existing structure. Aluminium rafters span from the wall plate to the ridge. The sub-frame is levelled and secured with stainless steel fixings. This stage takes approximately 4 to 6 hours depending on roof complexity.
Stage 3 - Insulation and membrane (Day 3): 100 mm PIR insulation boards are cut and fitted between the aluminium rafters. A continuous insulation layer is added over the top to eliminate thermal bridging. A breathable roofing membrane is laid over the insulation and fixed to battens.
Stage 4 - Tiles and external finish (Day 4): Lightweight tiles (Tapco slate, Metrotile, or composite options) are fixed to the battens from eaves to ridge. Ridge tiles, hip tiles, and verge trims complete the external finish. Lead flashing is dressed into the main house wall joint.
Stage 5 - Internal finish (Day 5): Plasterboard is fixed to the underside of the aluminium rafters. A skim coat of plaster creates a smooth ceiling. LED downlights are cut in, wired, and tested. The finished ceiling is indistinguishable from any other plastered room.
Why Choose the Leka System Over Other Tiled Roof Options?
The Leka roof system offers 5 advantages over alternative tiled conservatory roof systems. For a detailed Supalite vs Leka comparison, see our dedicated guide.
- Lightest weight - at 33 kg/m2, Leka is 40% lighter than timber-framed alternatives, fitting the widest range of existing frames
- LABC registered - pre-approved design simplifies building regulations approval, reducing processing time from weeks to days
- No timber in the structure - aluminium and composite materials eliminate rot, warping, and insect damage that affect timber frames over time
- Thermal bridge-free design - continuous insulation over the rafters eliminates cold spots that timber systems create at each rafter position
- 10-year workmanship guarantee and 40-year manufacturer's warranty - covers the complete system including sub-frame, insulation, and tiles with insurance-backed protection
Standard tiled conservatory roofs using timber frames weigh 55-75 kg/m2. This higher weight means some older conservatory frames require structural reinforcement before installation - potentially adding structural reinforcement costs. The Leka system avoids this expense for the majority of existing structures.
For homeowners comparing alternatives, solid conservatory roofs offer a different aesthetic at a slightly lower price point, while the Leka system provides the tiled appearance that matches the main house.
What Certification and Guarantees Does the Leka System Include?
The Leka roof system carries 3 levels of certification and guarantee protection.
LABC Registered: The Leka system is registered with LABC (Local Authority Building Control). This pre-approval means the structural design, thermal calculations, and fire safety compliance are already verified. Building control inspectors recognise the registration, speeding up the approval process.
BBA Certification: The system holds BBA (British Board of Agrement) certification - an independent assessment of fitness for purpose and durability. BBA certification is recognised by building control bodies, warranty providers, and mortgage lenders.
10-year workmanship guarantee and 40-year manufacturer's warranty: Every Leka installation includes a 10-year workmanship guarantee and 40-year manufacturer's warranty covering the complete system. The guarantee is transferable to new homeowners if the property is sold, protecting property value.
As certified Leka installers, we maintain training and accreditation standards required by Leka Systems Ltd. Every installation follows the manufacturer's specification, ensuring the guarantee remains valid.
How Much Does a Leka Roof System Cost in Liverpool?
The cost of a Leka roof system depends on the size of your conservatory and any specific structural requirements. Request a free survey for an accurate, no-obligation quote that covers all materials, labour, scaffolding, building regulations, and the 10-year workmanship guarantee and 40-year manufacturer's warranty.
How Do I Arrange a Free Survey for the Leka Roof System?
Book a free survey by calling 0151 453 9786 or completing the form on this page. A certified Leka installer visits your property, assesses the existing conservatory structure, and confirms whether the Leka system is suitable without frame modification.
The free survey takes 45 to 60 minutes. Measurements, structural assessment, and tile colour selection are covered during the visit. A detailed quotation arrives within 24 hours with no obligation to proceed.
We install Leka roof systems across Liverpool, Merseyside, and the North West. Visit our conservatory roof replacement homepage for an overview of all services, or read about tiled conservatory roofs, solid conservatory roofs, and pricing for all systems.