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Thermakraft 215 Building Paper

Bitumenous Self Supporting Wall and Roof Underlay for use in residential or commercial walls and roofs.

Key Features

  • High Moisture Absorbancy
  • Breathable
  • Cost Effective

Advantages

Versatile building Underlay, designed for use in residential and commercial wall and roof applications. Reduces wind entry into wall and roof cavities, improving thermal efficiency of bulk insulation. High water resistance provides for temporary weather protection prior to installation of cladding, and acts as a secondary layer of water protection during its serviceabler life. Highly water vapour permeable, allowing excess water vapour that may otherwise condense in the wall structure to escape.

PropertiesUnit
Construction:
Bitumenous impregnated Saturation Grade Kraft Paper
Basis Weight (g/m²):
390
Roll Sizes (m²):
1250mm x 20m(25m2), 1250mm x 40m (50m2), 1450 x 34.5(50m2)
Roll Weight (kg):
10, 20,20
Water resistance (mm):
Requirement: 100mm (Roof Underlay)
Pass: Yes
Vapour Resistance (MN.s/g):
< 0.75
Requirement: ≤7.0
pH Extract (pH):
Requirement: 5.5-8.0
Pass: Yes
Shrinkage (%):
Requirement: ≤ 2%
Pass: Yes
Air Barrier:
air_barrier
Durability (Years):
50
Max UV Exposure (days):
7
Wind Zone:
Very High
Requirement: R1/R2/W1/W2
Duty Classification:
R2
Requirement: W1/W2/W3/R1/R2
Absorbency (g/m²):
> 150
Cavity:
is_cavity
Cladding:
Direct Fix Absorbent Cladding, Direct Fix Non Absorbent Cladding, Direct Fix Metallic Cladding
Breathable:
is_breathable
Vapour Control Layer:
--
Roof Pitch:
≤ 8°, > 8°
Supported:
Self Supporting
Fire Retardant:
--
Air Barrier (MN s/m³):
Requirement: ≥0.1
Pass: Yes