Jablite is the UK's largest producer of EPS products for insulation and civil engineering applications

Warm Roof Insulation


Jablite Tapered Insulation is a BBA-certified insulation for warm flat roofs when the waterproofing is installed over the insulation.

Jablite provides a bespoke design service and quote for insulation within 48 hours from your enquiry.

Jablite tapered insulation for warm roofs is compatible with a wide range of waterproofing systems. The insulation is designed to direct water off the roof and is supplied in a single layer enabling fast and easy installation.

Key Benefits
  • British Board of Agrément certificate 01/3812.
  • Available in increments of 1mm from 20mm to 600mm
  • Available as a tapered insulation scheme with our full design service
  • Reduces weight load on the roof structure
  • No screed no drying time – reducing installation time and costs
  • Single layer installation
  • Resistant to moisture
  • Resistant to the effects of freeze/thaw
  • Lightweight and easy to handle
  • Provides long lasting dimensional stability
  • Excellent compressive strength
  • A+ rated in the BRE Green Guide to Specification
  • Ozone Depletion Potential = Zero
  • Global Warming Potential <5


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Downloads & Specifications
Warm Roof Insulation

BBA Certificates and other supporting documents can be found in Technical Resources

Technical Resources
Technical information
Product specification

Jablite Flat Roof Tapered insulation is supplied:

As EPS 100, 150 or 200 as defined in BS EN13163
In boards sized 1200 x 1200mm, 1200 x 900mm or 1200 x 600mm
With a flame-retardant additive achieving Fire Class E
Available with 3B and SBS felts one or both sides if required


APPLICATION : Product Selection
Tapered Insulation Single Ply – PVC Single Ply – TPO Single Ply – EPDM (Rubber) Liquid Applied Built up Felt
Flat Roof Board
Flat Roof Board (HP)
Flat Roof Board B 3B
Flat Roof Board B HP
Flat Roof Board B HP Torch
Hybrid 25
Hybrid 30


Jablite Flat Roof Tapered is produced to the requirements of BS EN 13163 ‘Thermal insulation products for buildings – Factory made products of expanded polystyrene (EPS) – specification’.


The boards are available as un-faced EPS for use with fleece backed single ply PVC membranes or with a laminate to suit alternative weather proofing specifications, for example; EPDM, Bituminous Felt and Liquid Applied membranes.

Jablite Flat Roof Board is lightweight and easy to install.

There are no requirements for special PPE when installing or cutting the insulation panels.

+Is Jablite packaging environmentally friendly?
Jablite is continuously striving to reduce packaging on its products. Products are wrapped in film as and when necessary to protect them during transport and storage on site. Ongoing efforts have been made to minimise the thickness of film used to reduce the packaging further. Pallets are used when requested by customers, but wherever possible recyclable EPS 'skids' are used.
+Does Jablite manufacture to ISO 14001?
Yes, Jablite is certified to the BS EN ISO 14001 Environmental Management System standard.
+Does Jablite EPS include any recycled material?
Yes. Jablite standard products use between 0% and 60% recycled material depending on the grade, type of product and recycled material availability. The recycled material is from off site sources e.g. clean offcuts from building sites or from the manufacturing process - 100% of Jablite's manufacturing EPS waste goes back into the manufacturing process.
+Does Jablite’s manufacturing process use a lot of energy?
No. Compared with other insulation materials, the manufacturing process uses only small amounts of energy as the Jablite EPS bead is expanded by steam.