Roofshield – Vapour permeable underlay - NBS National BIM Library

Roofshield – Vapour permeable underlay

Roofshield – Vapour permeable underlay

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This object complies to standards for the UK, but it may also be suitable for use in other locations.

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Roofshield is a unique, three - layer, nonwoven, spunbonded, polypropylene breather membrane with a patented melt - blown core. It is intended for use as a pitched roof underlay (breathable roofing felt) and is fixed beneath tiles and slates. Roofshield provides a secondary barrier to the ingress of rain, wind and snow. It has a low vapour resistance and is also air permeable, significantly reducing the incidence of interstitial condensation in pitched roofs.

Platform Compatible Version Certified to
IFC IFC 2X3 3 1.3
Revit Revit 2015 + 5 1.3

  • Properties and values
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  • What's Changed?

Properties and values

COBie
NBS_General
NBS_Data
Accessories
Roofshield/ Frameshield tape
AirPermeability
34.4 m³/m²h.50Pa
AntistaticProperties
n/a
Certification
BBA Certificate - 96/3220, BBA Certificate - 99/3648
Elongation
MD: 45% (±20%, before aging), 30% (±20%, after aging); CD: 60% (±20%, before aging), 45% (±20%, after aging)
Form
Non-woven
LowTemperatureFlexibility
No cracking at -60°C
MoistureVapourPermeability
n/a
RollLength
50.0 m
RollWidth
1000 mm
SizeOptions
n/a
StandardThickness
0.60 mm
TearResistance
MD: 180 N (-50 N); CD: 175 N (-50 N)
TensileStrength
MD: 340 N (-80 N, before aging), 290 N (-80 N, after aging); CD: 230 N (-80 N, before aging), 190 N (-80 N, after aging)
UVStabilization
n/a
WaterPenetration
Class W1
WaterVapourResistance
0.065 MNs/g, 0.013 m (Sd-value, ±0.005 m)
WeightMinimum
175 g/m²
Pset_CoveringCommon

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What's Changed?

08/03/2017

Changes to reflect updates to the NBS BIM Object Standard v1.3

  • Removal of Uniclass2 property
  • Addition of Uniclass 2015 properties
  • Addition of COBie Category property value

Objects have also been updated to Revit 2015