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Leka Systems PDF Summary

Leka Systems manufactures roofs for conservatory and orangery extensions. This report provides an overview of Leka’s conservatory roof products, including product details, features, construction, performance specifications, and applications. For more detail, download the pdf here

Product Overview

Leka offers several conservatory roof options made from various materials:

Polycarbonate Roofs

  • Clear roof – Transparent multi-wall polycarbonate sheets. Provides maximum light transmission.
  • Opal roof – Opal tinted multi-wall polycarbonate panels. Diffuses light to reduce glare and heat.
  • Bronze roof – Bronze tinted multi-wall polycarbonate sheets. Adds warmth while reducing glare.

Glass Roofs

  • Glass roof – Energy efficient glazing in thermally insulated aluminium frames. Multiple glass options.
  • Hybrid glass and polycarbonate roof – Combination of glass and polycarbonate panels.

Tile Roofs

  • Ultrasky roof – Insulated aluminium system with integrated tiles. Recreates traditional roof appearance.
  • Livinroof – Insulated aluminium bars supporting real slate or tile finish. Authentic tiled roof look.

Other Roof Options

  • Flat roof – Insulated flat roofing system. Incorporates rooflights.
  • Lantern roof – Glazed structural opening in centre of roof for light.
  • Bespoke roofs – Custom roof designs.

Key Features and Benefits

  • Thermal insulation – Polycarbonate and glass options with double or triple glazing minimize heat loss.
  • Solar control – Tinted, reflective and coated glass reduces solar gain. Motorized blinds also available.
  • Easy installation – Modular polycarbonate sheets install without specialist skills or equipment.
  • Appearance – Polycarbonate and glass maintain clarity. Tile options blend with house roof.
  • Light transmittance – Clear polycarbonate gives maximum light. Diffusers reduce glare.
  • Strength – Polycarbonate withstands extreme weather and impacts.
  • Long life – Polycarbonate guaranteed for up to 10 years. aluminium and glass have 25+ year lifespan.
  • Large spans – Roof beams accommodate widths of 4-6.5m without intermediate supports.
  • Ventilation – Roof vents, opening windows/doors, or fanlights can be incorporated.

Product Construction

Polycarbonate Sheets

  • Multi-wall structured polycarbonate panels. 10mm to 32mm thick options.
  • UV protected on outer surface. Inner walls have diffusive coating to improve light distribution.
  • Aluminium capping glazed into top sheet edges for weather protection.
  • Clear, opal or bronze tinted options. Light transmission from 61% to 34%.

Glass Roofs

  • Double or triple glazed sealed glass units in thermally insulated aluminium frames.
  • Glass options: Low-E coated, solar control, acoustic, thermal insulation, self-cleaning.
  • Glass can be combined with polycarbonate panels.
  • Motorized shading systems e.g. blinds, screens and dim-outs available.

Tile Roofs

  • Aluminium rafters with integrated terracotta or slate tiles on top surface.
  • Insulated aluminium box section rafters thermally isolate tiles.
  • Interlocking crossbars connect rafters. Spacing ensures tiles stay in place.
  • Breathable underlay below tiles allows vapour to escape preventing condensation.

Flat and Lantern Roofs

  • Insulated aluminium flat roofing system.
  • Glazed aluminium framed lanterns or rooflights. Double or triple glazed.

Performance Specifications

Thermal Insulation

  • Polycarbonate U-values: 1.3 to 3.1 W/m2K depending on thickness.
  • Glass U-values: 0.9 to 1.7 W/m2K depending on glass units.
  • Tile roof U-value: 1.2 W/m2K.

Light Transmission

  • Clear polycarbonate: 61% to 79% light transmission depending on thickness.
  • Opal polycarbonate: 52% to 61% light transmission depending on thickness.
  • Bronze polycarbonate: 34% to 49% light transmission depending on thickness.

Solar Factor

  • Clear glass: 60% to 75% depending on coating.
  • Tinted/coated glass: <50% solar factor.

Wind and Snow Loading

  • Polycarbonate withstands wind speeds of 70-100 mph and snow loads up to 75 kg/m2 (subject to glazing bars and bracing).
  • Glass roofs engineered for site-specific load conditions.

Fire Performance

  • Polycarbonate rated B-s1, d0 to EN 13501-1 for reaction to fire.


Leka roofs suit the following conservatory applications:

  • Victorian – Period style with bay front, pitched sides and facia.
  • Gable – Pitched roof with gable ended façade. Rectangular or L-shaped plans.
  • Lean-to – Single pitch roof against existing house wall. Simplest style.
  • Edwardian – Square or rectangular with flat front and pitched roof.
  • P-shaped – Combination style with flat front and pitched sides/rear.
  • Bespoke – Custom roof designs for complex shapes and large spans.
  • Orangeries – Heavy duty stone/brick piers with glazed roofing in between.


In summary, Leka Systems provides a wide selection of conservatory roof products in polycarbonate, glass and tiled finishes. Their roofs offer thermal insulation, natural light with glare protection, strength, and long lifespan. Leka roofs suit Victorian, Edwardian, lean-to and bespoke conservatory designs in residential and commercial settings.