Vapour Permeable Roofing Underlay

Taped Harcon VPU

Single Taped Harcon VPU

Harcon VPU vapour permeable underlay is available taped to one side of the membrane for ease of installation, in 2 weights options of 102g and 125g and in two widths of 1000mm and 1500mm.  Ariel’s single taped underlays are used to seal horizontal laps, contributing to increased thermal efficiency by reducing air infiltration and convective heat loss, whilst improving wind uplift performance.

features

  • Single taped product for ease of application 
  • Flexibility of joint position
  • Excellent adhesion and quick stick abilities
  • 2 weight options available: 102g and 125g
  • 2 widths: 1000mm & 1500mm
  • Complies with BS5534:2014

ideal for

  • Warm non-ventilated roof structures
  • Cold ventilated roof structures 

guidance

Refer to the Harcon VPU installation guide for complete installation instructions.

Material
The vpu membrane has a 3 layer composite structure with the vapour permeable film bonded between two layers of non-woven polypropylene. 

VPU Weight Options:

  • 102gsm budget weight
  • 125gsm standard weight
  •  

Harcon VPU Taping Requirements

Recent changes to BS 5534: 2014 (Code of practice for slating and tiling for pitched roofs and vertical cladding) relating to wind uplift requirements, now require some membranes to be taped in highly exposed locations. Refer to tables for the appropriate taping requirements for Harcon VPU range of membranes. 

 

Material Properties 125gsm 102gsm
Thickness (mm) 0.50
0.40
Mass per unit area (g.m-2) 125 102
Roll length (m) 50
50
Roll width (m) 1/1.5
1
Colour Blue Grey

Tensile strength (N.50 mm-1)

Longitudinal

Transverse

 

285

165

 

 250

 140

Elongation (%)

Longitudinal

Transverse

 

70

90

 

60

70

Tear Resistance (N)

Longitudinal

Transverse

 

125

120

 

100

95

Watertightness

Unaged

Aged

 

W1

W1

 

W1

W1

Water vapour transmission (Sd) (m) 0.029 0.029
Vapour resistance (MN.s.g-1) 0.145
0.145
 Fire Properties (EN 11925-2 : 2002) Class D, d2   Class D, d2

accessories

Open/close panel Customer service

Get in touch

Contact our customer service team
*
*
*
*
 
Captcha