Home > Companies > Armatherm, a Brand of Armadillo Noise & Vibration Limited > Armatherm™ Grade FRR and 500 Roof Penetration

Structural thermal bridging for parapet roof penetration, which can be achieved from Armatherm™ Grade FRR and Armatherm™ Grade 500 materials.

The roof is part of the building envelope where penetrations such as davits, anchors and supports for dunnage extend through the thermal envelope and roof insulation creating non-continuous insulation. These interface details are typically connected to interior trusses or structural elements, creating a thermal bridge and point transmittance. The thermal resistance (R-value) of the roof can be reduced by 40% in these areas.

A thermal break in these locations will improve the thermal transmittance (U-value) of the roof assembly and prevent potential condensation problems at the structural connection. Armatherm™ FRR and 500 series thermal break materials can transfer the loading conditions at these locations while significantly reducing heat flow. The transmittance can be improved by as much as 80%.

Performance (scenarios):

- Roof anchor without thermal break:

  • Roof insulation 1D R-value: R-40 (7.04 W/m²K).
  • Clear field R-value: R-42.3 (7.44 m²K/W).
  • U-value: 0.024 (0.134 W/m²K).
  • R-value (effective): R-25.5 (4.49 m²K/W).
  • U-value (effective): 0.04 (0.223 W/m²K).
  • Point transmittance of anchor: 0.204 (0.35 W/mK).

- Roof anchor with 12.7 mm Armatherm FRR:

  • Roof insulation 1D R-value: R-40 (7.04 W/m²K).
  • Clear field R-value: R-42.3 (7.44 m²K/W).
  • U-value: 0.024 (0.134 W/m²K).
  • R-value (effective): R-27.2 (4.79 m²K/W).
  • U-value (effective): 0.036 (0.209 W/m²K).
  • Point transmittance of anchor: 0.175 (0.30 W/mK).
  • Reduction in heat loss: 14%.

- Roof anchor with 150 mm Armatherm 500:

  • Roof insulation 1D R-value: R-40 (7.04 W/m²K).
  • Clear field R-value: R-42.3 (7.44 m²K/W).
  • U-value: 0.024 (0.134 W/m²K).
  • R-value (effective): R-37.2 (6.55 m²K/W).
  • U-value (effective): 0.027 (0.153 W/m²K).
  • Point transmittance of anchor: 0.041 (0.07 W/mK).
  • Reduction in heat loss: 80%.

Standard product features

Technical characteristics:

  • Compressive modulus: 125/ 200/ 340 N/mm².
  • Compressive stress: 3.8/ 7.6/ 14.8 N/mm².
  • Thermal conductivity: 0.05/ 0.07/ 0.09 W/m·K.
  • Operating temperature: -185°C to 80°C.

NBS Specification

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This product is associated with the following NBS Create clause:
45-75-42/399 Thermal break connection plates

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying

Manufacturer

Name:

Armatherm, a Brand of Armadillo Noise & Vibration Limited

Tel:

+44 (0)1274 591115

Product reference

Armatherm™ Grade FRR and 500 Roof Penetration

Thickness

[25 mm]
[50 mm]
[75 mm]
[100 mm]
[150 mm]
[200 mm]
[250 mm]

Manufacturer details

Riverside Works,
Brighton Street,
Shipley,
West Yorkshire, BD17 7EB
Tel +44 (0)1274 591115
Fax
NBS Plus
RIBA CPD