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50mm Xtratherm Flat Roof Board FR-MG (pack of 10)

50mm Xtratherm Flat Roof Board FR-MG (pack of 10)
50mm Xtratherm Flat Roof Board FR-MG (pack of 10)
Guide Price: £85.32 (£102.38 inc VAT)
Price per m2: £11.85/m2 (£14.22 inc VAT)
  • Product Code: A1-186
  • Delivery Time: 3 - 5 days
  • Due to nationwide shortage of PIR insulation lead time may be longer for this product.
  • Brand: Xtratherm
  • (tech. support: 03712221055)
  • Model and Size: 1200x600mm - 7.2m2
  • Weight: 9.90kg
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50mm Xtratherm Flat Roof Board FR-MG (pack of 10)

Length: 1200mm
Pack Coverage: 7.2m2
Density: 30kg/m3
Weight of 1m2: 1.5kg
Weight: 9.9kg
Thermal Conductivity: 0.025W/mK
R-Value: 2m2K/W
Compressive Strength: 150kPa

Xtratherm FR-MG 50mm is a mineral coated glass faced board. Xtratherm XT/FR MG boards should be laid over the vapour control layer in a break bonded pattern. The long edges of the boards should be laid at right angles to the direction of the substrate and all edges must be fully supported by the deck. The XT/FR MG insulation boards are secured by approved mechanical fixings or sufficiently bonded. The requirement for a separate water vapour control layer should be assessed in accordance with National Regulations.


Xtratherm XT/FR MG boards are suitable for use on:

  • Rooftop decks subject to maintenance traffic; 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.
  • Below most single-ply fully adhered and mechanically fixed roof membrane systems or loose laid ballasted roofing systems.

Vapour control layer should be used when required with mechanically fixed boards. A 1000 gauge polythene layer lapped and sealed with double-sided tape should be used below the insulation. Consideration should be given to the recommendations of BS4841: Part 3 1987 and those of the Single Ply Roofing Association. The fall on a flat roof should be constant and steep enough to ensure that rainfall does not pond. Care must be taken to provide adequate falls, i.e., 1-80 to rainwater outlets.

  • High Thermal Performance
  • Suitable for full bonding with approved adhesive systems
  • Compatible with adhesively bonded single-ply roofing membranes laid on mechanically fixed boards
  • 16-20 Suretwist fixings are needed per 1200x2400mm board for mechanical fixings.
  • Xtratherm Flat Roof Board FR-MG is manufactured under ISO9001 assured quality system.
  • FR-MG Board is CFC/HCFC free with zero ozone depletion potential and a Global Warming Potential less than 0.01.
  • The fire rating when tested to BS 476 Part 3: 1968 ‘External Fire Exposure Roof Test’ will be dependent upon the waterproofing system specified.

Other sizes are available subject to quantity and lead time.