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120mm Flat Roof Insulation Board Xtratherm FR-BG (pack of 3)

120mm Flat Roof Insulation Board Xtratherm FR-BG (pack of 3)
Product Code: A10-304
Brand: Xtratherm
Model and Size: FR-BG 1200x600 (2.16m²)
Pack Coverage: 2.16m2
Delivery Time: 3 - 5 days
Guide price: £43.10 (£51.72 inc VAT)
Guide price per m2: £19.95/m2 (£23.94/m2 inc VAT)
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120mm Xtratherm Flat Roof Board FR-BG (pack of 3)

Board size: 1200mm x 600mm
Area per pack: 2.16m2
Thermal Conductivity: 0.025 W/mK
R-Value: 4.80 m2K/W
Density (Foam Core): more than 30 Kg/m3
Fire Rating: Euroclass F

Xtratherm FR-BG is PIR insulation board is faced with a fleece finished bitumen/glass facers and is suitable for use below partially bonded bitumen based built up roofing systems. FR-BG can also be used in mechanically fastened or loose laid ballasted bituminous roofing systems.


  • Xtratherm FR-BG  can be used in most bitumen based water proofing systems including those using a BS747 type 3G perforated base layer. The roof should be laid in accordance with BS 8217: 2005 (Reinforced bitumen membranes for roofing)
  • Xtratherm FR-BG is suitable for use on roof decks that are subject to limited maintenance foot traffic

During the construction process, the construction should be protected from rain penetration during breaks in the process. The fall on a flat roof should be designed to ensure that rainfall does not pond. Care must be taken to provide adequate falls i.e. 1 in 80 to rain water outlets. Walkways should be provided on roofs requiring regular pedestrian access. When the roof is complete, protective boarding should be laid if additional site work is to be carried out. Built up roofing systems should be finished with a suitable reflective layer such as chippings.

120mm Xtratherm Flat Roof Board FR-BG characteristics:

  • High Thermal Performance
  • Compatible with bitumen based built up BUR roofing systems
  • Suitable for bonding with approved bitumen adhesive systems


  • Xtratherm XT/FR BG will typically achieve Euroclass F Fire Rating.
  • Built-up roofs using Xtratherm XT/BG as part of a 3 layer system with mineral chippings on the cap sheet will attain an FAA rating when tested to BS476, Part 3: 1988 external fire exposure roof test


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