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Jablite Flat Roof Inverted


Jablite Flat Roof Inverted is high performance insulation used to insulate flat roofs in commercial buildings.

Key Features of Jablite Flat Roof Inverted

  • Jablite 200 performs to a design load capability of 90KN/m²
  • Jablite 300 performs to a design load capability of 120KN/m²
  • BBA and ETAG 031 approved
  • Easy to install
  • Available in increments of 1 mm from 50mm to 250mm
  • Lightweight
  • Resistant to moisture
  • Durable
  • High dimensional stability
  • Excellent compression properties
  • Overlap on boards preventing uplift during installation
  • Single layer installation up to 250mm
  • Manufactured from EPS (expanded polystyrene)

The U-value that you want to achieve will determine the grade and thickness required.

Standard board size is 1200 x 1200mm.


  • Jablite Filter Membrane: Vapour permeable high performance spun-bonded polypropylene flexible membrane

Jablite Flat Roof inverted has been assessed and approved by the British Board of Agrément for insulating inverted roofs; certificate 01/3812.

Click here to download the BBA certificate

Relevant Applications View our Case Studies















Central Roofing, Managing Director, Tony Davies, says: 

 “We like using Jablite Flat Roof Inverted because it is so easy to install. We are supplied with one board to the required thickness; the pieces can be slotted together like a jigsaw – they are lightweight and durable.

“Jablite collects off-cuts from the site and recycles them in the UK - we are ISO 14001 registered so that is important to us.

“We use Jablite Flat Roof Inverted on high calibre projects like hospitals and clinics where there are millions of pounds of equipment in the building and the building manager cannot afford to take any risks."


Inverted Roof

Membranes in traditional cold and warm roofs are exposed to the elements and are prone to expansion and contraction during the course of their lifespan. With age, these membranes can weaken and crack leading to leaks and replacement in relatively short periods of time

Jablite Flat Roof Inverted solves this problem by being a specially developed insulation that is laid over the membrane, thus insulating it from the worst of the weather, leading to greater longevity of the whole waterproofing system.



Jablite Insulation and the Code for Sustainable Homes

The Code for Sustainable Homes (the Code) is the national standard for the sustainable design and construction of new homes. The Code aims to reduce our carbon emissions and create homes that are more sustainable. It applies in England, Wales and Northern Ireland.
A copy of the Code can be found here´╗┐´╗┐.


Mat 01: Environmental Impact of Materials

Jablite insulation products are made from EPS (expanded polystyrene) which has an A+ rating in the BRE Green Guide*.

*The BRE Green Guide to Specification provides you with easy-to-use guidance on how to make the best environmental choices when selecting construction materials and components. 

Environmental rankings:  A+ represents the best environmental performance and E the worst environmental impact.


Jablite Insulation has a Global Warming Potential (GWP) of less than 5 and an Ozone Depletion Potential (ODP) of zero.

The blowing agent used during manufacture is pentane which has zero ODP and a GWP of less than 5.


Jablite Insulation and BREEAM

BREEAM (Building Research Establishment Environmental Assessment Method) sets the standard for best practice in sustainable design and in the measurement of a building's environmental performance. BREEAM enables developers, designers and building managers to demonstrate the environmental credentials of their buildings to clients, planners and other parties,
You can find out more about BREEAM here


In this category, the specified aim of BREEAM is to “recognise and encourage the use of thermal insulation which has a low embodied environmental impact relative to its thermal properties and has been responsibly sourced.”

It is a pre-requisite of BREEAM that any new insulation specified for use within the following building elements must be assessed:
1.    External walls
2.    Ground floor
3.    Roof


Jablite insulation products are made from EPS which has been given an A+ rating by the BRE.

The calculation of embodied impact relative to thermal performance is a function of the material volume (for each build), its BRE Green Guide Rating and its thermal conductivity.

The thermal conductivity of our products is available on both the product packaging and on relevant product technical datasheets which can be found on this website.


Jablite insulation products are manufactured in factories which are ISO 14001 certified and Jablite purchases raw material from suppliers who are ISO 14001 certified.
Key Process (Insulation Manufacture)
ISO 14001: Certificate Number EMS 559414

Supply Chain Processes (supply of materials for end products)
ISO 14001
Certificate Number NL 007629-1 



Jablite Insulation and the Environment


Jablite insulation products are 100% recyclable. We collect waste from building projects and recycle it.

Our manufacturing process

All Jablite insulation products are manufactured at sites with ISO 14001 certification.

Steam is the main ingredient used in the manufacture of Jablite insulation.  The water consumption is low because the water is clean and can be re-used many times in the process.

No solid waste is generated during the manufacturing; any broken or faulty parts that do not pass our stringent quality control standards can be broken up and re-introduced into the process.

Jablite insulation products do not contain and are not manufactured using any substances which are controlled under Montreal or Kyoto Protocols.

Efficient use of natural resources

Jablite insulation products are  98% air and therefore extremely resource efficient. The lightweight nature of Jablite insulation means that less fuel is used when transporting from factory to building site.

Jablite insulation products are made from expanded polystyrene (EPS), a plastic that is obtained from oil. In Europe, the percentage of oil used in manufacturing EPS is 0.1%. 


The monomer styrene has been manufactured for more than 70 years and is used in a wide range of products.

Styrene exists naturally and can be found in many foodstuffs including strawberries, beans, nuts, beer, wine, coffee beans and cinnamon.


Pentane, a non-CFC expansion agent is used to expand polystyrene granules into the cellular structure that makes the production of EPS possible.

Pentane is a slightly volatile liquid in the same chemical family as methane, ethane, propane and butane and is continually being formed in natural processes in the digestive systems of animals and the decomposition of vegetables. It is not considered a substance harmful to health by European health authorities.

Pentane does not contain chlorine and therefore does not harm the ozone layer.

No CFC’s (chloroflourocarbons) or HCFC’s (hydrochloro-fluorocarbons) are used in the manufacture of EPS.







Download a concise summary of  the performance of Jablite insulation products with regard to the Code for Sustainable Homes and BREEAM here.