PHS Hi-Thermia

Metallised, Reflective Low Emissivity VCL Membrane

Metallised VCL with very low emissivity, reflecting up to 97% radiant heat and provides efficient condensation control for all building types.

Features

Premium Quality
Cost Effective
Technical Support
Installation Guides

PHS Hi-Thermia reflective membrane is a very durable and robust vapour control layer (VCL), applied internally. It’s metallised surface reflects up to 97% radiant heat back into the building which enhances thermal performance. It has a very low emissivity and a high vapour resistance, so when installed continuously with all laps and penetrations sealed it provides efficient condensation control in all building types.

Applications:

Interior installation to create an airtight envelope.
All construction types.
Warm and cold pitched roof.
Ceilings, walls, suspended floors and loft spaces.

Features & Benefits:

High vapour resistance of 750MNs/g.
Improves airtightness and thermal performance.
R value of 0.79m²K/W when used with a minimum 19mm service cavity.
Meets Building Regulations Part L.
Increases building energy effciency.

Water Penetration Resistance	Class W1
Colour	Silver
Elongation Transverse	16%
Location	Internal
Elongation Longitudinal	16%
Mass Per Unit Area	115g/m²
Resistance to Fire	Class E
Roll Area	72 m²
Roll Weight	8.28 kg
Size	1.2m x 60m
System	Airtight, Retrofit
Tear Resistance Longitudinal	≥325N
Tear Resistance Transverse	340 N
Tensile Strength Longitudinal	416 N/50mm
Tensile Strength Transverse	371 N/50mm
Thermal Resistance	0.79m²K/W
Water Vapour Resistance - Sd Value	2842m, Fixed
Material	Airtight Membrane
Approx Coverage	65 m²
Thickness	0.18mm
μ=Value	8330
Airtight	<0.01 (m³/(m²H50Pa))
Application Area	Ceiling, Floors, Internal Wall, Loft Space

Application

Areas of Application:

Airtight suspended timber floors.
Warm pitched roof construction.
Cold pitched roof construction.
Timber frame construction.
Metal roofing solutions.
Protection for wall construction.

Installation Guide:

Use PHS Reflecta tape to seal laps, penetrations, and cuts in the membrane, as well as connections to adjacent airtight layers at roof and floor junctions.
When installing, the reflective, printed surface must be face the warm side of the insulation and always face an airspace.
The ideal installation is to fix a standard 25mm batten over the membrane before applying the slab.