PHS Astra

Airtight Vapour Control Membrane - Fixed Sd

Internal, economical, airtight VCL with fixed Sd of 10m to prevent drafts and the build-up of condensation within the building envelope.

Features

Premium Quality
Cost Effective
Technical Support
Installation Guides

PHS Astra vapour control membrane enables airtightness and vapour control in roof and wall constructions. It has an optimum fixed vapour resistance level of Sd 10m. This allows for an ideal level of vapour control, by preventing diffusion of internal vapour into the building envelope and prevents a build-up of condensation within the building envelope, which can cause mildew growth and structural damage. The CE sign in accordance with DIN 13984 gives the necessary assurance for the quality of the product.

Applications:

Interior installation to create an airtight envelope.
All construction types.
Ceilings, walls, floors and loft spaces.

Features & Benefits:

Lightweight, flexible and moisture resistant.
Improves airtightness and thermal performance.
Increases building energy efficiency.
Water vapour transmission fixed Sd value 10m.
Reduces draughts and heat loss.

Colour	Green Graphics on White
Location	Internal
Mass Per Unit Area	85g/m²
Resistance to Fire	Class E
Material	Airtight Membrane
Roll Weight	6.375 kg
Roll Area	75 m²
System	Airtight
Elongation Longitudinal	91%
Elongation Transverse	102%
Tear Resistance Longitudinal	126N
Tear Resistance Transverse	144N
Tensile Strength Longitudinal	≥129N/50mm
Tensile Strength Transverse	≥100N/50mm
Water Vapour Resistance - Sd Value	10m, Fixed
Water Penetration Resistance	Class W1
Approx Coverage	67 m²
Thickness	0.4mm
μ=Value	2500
Airtight	<0.01 (m³/(m²H50Pa))
Application Area	Ceiling, Floors, Internal Wall, Loft Space
Type of Build	Block, ICF, Steel Frame, Timber Frame
Size	1.5m x 50m

Application

Installation Guide:

Store in dry rooms from +5°C to +25°C, protected from UV-radiation.
The membrane should be applied perpendicular to the direction of the application surface i.e. studs, rafters and joists.
The membrane should be fixed with staples every 150mm or with PHS Duplex double sided tape.
PHS Argo Plus (Multi-Tape) should be used for bonding barrier overlaps, to seal penetrations and to repair perforations.
For connections to concrete, block or other masonry surface PHS Ottello internal adhesive sealant is recommended.
Ensure there is a 100mm overlap of the membranes and tape with PHS Argo Plus (Multi-Tape).