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Firestone ISO 95+™ GL Insulation

Firestone ISO 95+™ GL Insulation

Firestone ISO 95+ GL consists of a closed-cell Polyisocyanurate foam core laminated on both sides to a black glass reinforced mat facer of approx. 150 g/m². Firestone foam technology incorporates a HCFC-free blowing agent that does not contribute to the depletion of the earth’s ozone layer (ODP-free). Firestone ISO 95+ GL contains between 29 and 52% recycled material, depending on the thickness of the board.


As part of a Firestone Total Roofing System, Firestone ISO 95+ GL demonstrates a series of features & benefits:

  • Compatible with all types of single-ply roofing systems: ballasted, fully adhered and mechanically attached.
  • Suited for direct application onto steel roof, concrete or wood deck.
  • Outstanding thermal resistance and compressive strength.
  • ISO 95+ GL boards are Factory Mutual (FM) approved.

Key Features & Benefits

  • Suitable for adhered, ballasted and mechanically fastened single-ply roofing systems
  • They provide outstanding and stable thermal resistance, dimensional stability and compressive strength.
  • The foam technology does not contribute to the depletion of the ozone layer (zero ODP) and uses a HCFC-free blowing agent with a Global Warming Potential (GWP) of less than 5.


Product Specifications

Product Data

Firestone ISO 95+ GL insulation boards are available in flat boards of 1.22 x 2.25 m (4′ x 7’4.5″) and in thicknesses ranging from 25.4 mm to 101.6 mm (1″ to 4″).


Physical Properties

PropertyASTM testTypical ValueEN testTypical Value
DensityD-162232 kg/m³82332 kg/m³
Compressive strengthD-1621> 138 kPa826> 138 kPa
Dimensional stabilityD-2126< 2%  
Water absorptionC-209< 1% (by volume)12087< 3% (by volume)
Service temperature-73°C to 121°C   


Method of Application

Before insulation is placed on the roof deck, the surface must be clean, dry, free of debris, water, ice or snow, and suitably prepared by removing all defects that might affect the quality of the application. Insulation shall be neatly fitted to all roof perimeters, penetrations and abutments. No more insulation shall be installed than can be covered with membrane and completed before the end of each day’s work or before the onset of inclement weather. The Firestone PolyIso insulation boards are suitable for adhered, ballasted and mechanically attached single-ply roofing systems.


Polyiso insulation boards must be installed by using fasteners and plates, hot bitumen or Firestone approved insulation adhesives.

  • Mechanically Attached System
    Fasten the insulation boards with a minimum of 5 approved fasteners and plates per 1.22 x 2.25 m board. Additional fasteners may be required due to the presence of air/vapour barriers, in areas of high wind loads and/or around the perimeter of the roof.  
  • Ballasted System
    For ballasted roof systems, the top layer of Firestone insulation may be loose laid or adhered.  
  • Fully Adhered System
    Number of fasteners per board needs to be determined based on a wind uplift calculation in accordance with local building codes and taking into account the following minimum requirements:
    • Thicknesses up to 40 mm: minimum 16 fasteners per 1.22 x 2.25 m board
    • Thicknesses up to 50 mm: minimum 12 fasteners per 1.22 x 2.25 m board
    • Thicknesses up to 100 mm: minimum 8 fasteners per 1.22 x 2.25 m board

Code Compliance

Firestone ISO 95+ PolyIso insulation boards bear a variety of code body compliances noted below:

  • CE marked according to EN 13165
  • ASTM C-1289, Type II, Class 1
  • UL classified
  • Factory Mutual (FM) Class 1 Approved
  • CAN/ULC-S704, Type 1, Class 3
  • Manufactured in an ISO 9001 and ISO 14001 Registered Facility



TSMC, Shanghai China

  • RubberGard EPDM
  • ISO 95+ GL
  • Ballasted System + Green Roof
  • 56,000m2



Technical Datasheet

ISO 95 GL insulation