Home > Companies > FOAMGLAS® > 4.6.3 Roof - Insulation with thermally isolated Fixing Positions for Standing Seam Roof


  • Waterproof.
  • High compressive strength without deflection or movement.
  • Non-combustible.
  • Impervious to water and water vapour.
  • Sealed cellular structure.
  • Dimensionally stable.
  • Acid resistant.
  • Easily cut to shape.
  • Resistant to vermin.
  • Recycled content scrap glass: Minimum 60%.
  • Ozone Depletion Potential (ODP): <1%.
  • Global Warming Potential (GWP): Zero.
  • GreenSpec rating, see 'Cellular Glass' or 'Foamed Glass'.
  • Green Guide rating, see 'Cellular Glass'.


  • Quality: Systems with high quality materials. Quality management by systematic site inspections and professional consulting.
  • Cost efficiency: The high durability preserves maximum value and ensures minimal maintenance costs.
  • Sustainability: Optimum insulation performance and protection against moisture for future generations. Scrap can be reclaimed and re-cycled to make new Foamglas.
  • Insulation performance: Insulation performance is permanent; ageing does not take place. Use above and below ground, unaffected by moisture, humidity and compressive loads. Proven to retain its thermal and vapour control characteristics for ˃ 50 years.
  • No thermal bridging: Fully bonded insulation systems, metal roof fixings are secured to the insulation layer; hence preventing thermal bridging; and exposed fixings on the soffit side
  • Non-toxic: Foamglas cellular glass contains no toxic substances, does not contaminate water or the ground, in cases of fire, does not develop fumes or toxic gases.
  • Sealed structure and non-hydroscopic: Each cell has a glass wall, giving the unique structural strength, vapour tight and non-hydroscopic properties.
  • A separate vapour barrier is not required: With its purpose manufactured adhesives, Foamglas is suitable for extreme humidity environments and gives control of the vapour drive in any direction. Foamglas is an insulation and vapour barrier in one single material.
  • High compressive strength: Capability to withstand high compressive loads without deflection or movement.
  • Dimensional stability: Very low rates of thermal movement, mechanical fixings are not required to prevent delamination from the parent structure.
  • No fixings through the structural deck, no visible fixings on the soffit. No fixings, no thermal bridging.
  • Highly recommended for high humidity buildings, e.g. swimming pools and spas.

Standard product features


  • Thermal performance is permanent and never changes.
  • Manufactured from recycled glass (minimum 60%) and natural raw materials which are available in abundant supply - sand.
  • The insulation is totally inorganic, contains no ozone depleting propellants (CFCs, HCFCs etc), flame resistant additives or binders; VOC or other volatile substances.
  • For substrate quality and suitability, see Technical Guide TG1.

- Foamglas® Ready Board (T4+):

  • Density (EN 1602, ± 10%): 115 kg/m³.
  • Length (EN 822, ± 5 mm): 1200 mm.
  • Width (EN 822, ± 2 mm): 600 mm.
  • Thermal conductivity (EN ISO 10456): ≤ 0.041 W/m·K.
  • Reaction to fire (EN 13501-1): Core material Euroclass A1.
  • Compressive strength (EN 826 annexe A): ≥ 600 kPa.
  • Flexural modulus of elasticity (EN12089) 700 MN/m².
  • Bending strength (EN 12089): ≥ 450 kPa.
  • Tensile strength (EN 1607): ≥ 100 kPa.
  • Thermal expansion coefficient (EN13471): 9 x 10-6 K.
  • Impervious to water vapour (EN ISO 10456): µ=∞ infinity.
  • Green Guide rating A.
  • CEN Keymark: 001-BK-516-001-0029-T00A.
  • CPR DOP: 120211015.

The product is also available as Readyboard (2)(T4+) designed specifically as a base layer to complement standard Ready Board (T4+).



- Thickness:

For flat insulation thicknesses of ˃180 mm, use double layers of minimum 90 mm per layer.

  • Insulation Base Layer: Foamglas® Ready Board (2) (T4+).
  • Insulation Top Layer: Foamglas® Ready Board (T4+).

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying





+44 (0)20 7492 1731

Product reference

4.6.3 Roof - Insulation with thermally isolated Fixing Positions for Standing Seam Roof


PC® 11

Fixing plates

PC® SP150/ 150P


 - Type:

Foamglas® Ready Board (T4+)

 - Thickness:
[70 mm]
[80 mm]
[90 mm]
[100 mm]
[110 mm]
[120 mm]
[130 mm]
[140 mm]
[150 mm]
[160 mm]
[170 mm]
[180 mm]

Bituminous waterproofing membrane

As section J41, clauses 400 or 405

Separating layer

As section J21, clause 400

Surface layer

[Profiled metal sheet, as section H31]
[Standing seam metal sheet, as sections H71–75]

Manufacturer details

31-35 Kirby Street,
Hatton Garden,
London, EC1N 8TE
Tel +44 (0)20 7492 1731
Fax +44 (0)20 7492 1730
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