LEKA orangery roofs

LEKA orangery roofs

Designed by industry-leading suppliers LEKA and manufactured by SUNFLEX UK the innovative orangery roof, complete with glass reinforced plastic (GRP) offers a lightweight roof solution for extensions or replacement roofs.


Following the successful launch of the LEKA warm roof SUNFLEX UK has selected to manufacture and supply the innovative LEKA orangery roof system to our market-leading product range. 

Designed using the same advanced GRP technology as the advanced Warm Roof, the orangery roof offers a stylish alternative to a pitched roof and incorporates a frameless SUNFLEX UK glass lantern.

SUNFLEX UK has been appointed as an exclusive manufacturer of the LEKA system, utilising our skills and experience of more than seventeen years of manufacturing industry-leading, high quality products for the glazing industry.



Step 1 - GRP RaftersFirst, GRP rafters are added to your existing conservatory window frames, including a structural ring beam, rafters and ridge. The advantage of GRP is that it is not prone to:

  • wood worm
  • moisture absorption such as traditional timber
  • condensation
  • thermal bridging such as bulky Aluminium alternatives.

Step 2 - Insulation and Outer BoardsInsulated Celotex sheets are snugly fitted with a 15mm gap from the internal Leka sheets. Celotex is one of the UK's leading insulation specialists, providing high value thermal efficiency and BBA certified and a significant benefit in achieving a better conservatory roof insulation efficiency level.

Next, strong, load-bearing and insulated outer sheets are added. These ensure less roofing bars and higher efficiency. The Leka outer boards have been engineered to offer:

  1. A structural alternative to plywood
  2. A significantly lighter alternative to any other roof covering board
  3. A 100% waterproof outer covering
  4. A thermally efficient board

Step 3 - Outer coating and Lantern A SUNFLEX UK frameless glass lantern is then lowered onto the current structure and fixed into place by your installer. The glass lantern will allow light to flood through into the conservatory and provide an elegant looking finish.

Step 4 - Fascias and gutteringUPVC fascias and cappit are now attached onto the edges of the structure. This then allows guttering to also be attached onto the UPVC fascias cappit as an optional step.

Step 5 - Internal Leka boardsNext, internal Leka sheets are added underneath the GRP rafters. The Leka sheets are 100% waterproof and one third the weight of plasterboard.

These sheets have unique thermal qualities as well, but allow for a traditional plaster skim finish to provide a nice visual aspect ready for painting afterwards.

Step 6 - Internal PlasterThe underside of the roof then has a high quality, traditional skim plaster finish applied.

Low energy spotlights can then also be fitted for the best possible interior lighting.


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