POWERLON® Roof & building membranes
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Air & Vapour Control Layers
Powerlon AVCL is a polyethylene-based vapour control layer with a mono-filament reinforcement scrim for tensile strength in wall and roof installations. Vapour control (VCLs) ensure that the building envelope is properly sealed to control ventilation, prevent heat loss and protect insulates from interstitial condensation.
- Suitable for roof, wall and floor installations
- Reinforced polyethylene with high tensile scrim reinforcement
- Air barrier for controlling ventilation
- Choice of grades
- CE Marking
Grade Options
- VCL 250 – 285gsm
- VCL 170 – 210gsm
POWERLON UltraBlock
POWERLON® UltraBlock is a range of thermo-reflective air barriers and vapour control layers incorporating encapsulated aluminium foil or metallised barrier layers to maximise energy efficiency. The reflective foil surface improves the insulation characteristics of the installation, reflecting heat back into the building.
- High water vapour resistance
- Reflective foil layer for enhanced retention of thermal energy
- Exceptional water vapour resistance
- Self-adhesive version available
- CE marking
THE APPLICATION OF VAPOUR CONTROL LAYERS IN BUILDINGS
A vapour control layer forms a barrier layer within buildings, which prevents interstitial condensation and thus simultaneously prevents problems from moisture and improves energy efficiency/comfort. It’s a vital component within the construction of buildings as water vapour can damage even the strongest building structures. A good vapour control layer helps to maintain the building quality and ensure effectiveness of insulation.Water in its gaseous state becomes water vapour which is totally invisible. This then diffuses through buildings from the warm interior of a household towards the cold exterior. As water vapour passes through the walls of buildings and meets a surface below the dew point (being when water vapour condenses), it becomes condensation which poses a threat to the effective of insulation and can damage building structures.
WHERE ARE VAPOUR CONTROL LAYERS INSTALLED?
A vapour control layer, or vapour barrier, is installed in or along walls, ceilings, and floors on the warm side of the insulation to resists moisture from the warm side getting into the insulation. Any tiny amount of vapour within a wall cavity evaporates outside due to cooler external air, which makes it especially important that any paints or potential barriers are removed to allow this evaporation process to occur.
The Ultrablock reflective vapour barrier membranes have the exact opposite effect of the breather membranes. The Ultrablock 300 and Ultrablock 200 are both reflective and help with the thermal efficiency of the build.
THE IMPORTANCE OF A VAPOUR CONTROL LAYER
When insulation is introduced within a building structure, a cold space between the insulation and outer building is created which generates a potential area in which this interstitial condensation can occur. It’s therefore important that this process is controlled, by preventing the movement of warm, moist air to the cold surface. A vapour control layer controls the amount of moisture allowed through, and thus the building structure can cope.
VAPOUR BARRIER OR AIR BARRIER?
VAPOUR BARRIERS ON COMMERCIAL ROOFS
Vapour barriers are often specified in the construction of roofs to prevent moist air from the inside of buildings condensing and potentially damaging materials. A vapour barrier is an important way to preserve the effectiveness of insulation and therefore makes up a vital part of protecting the thermal efficiency of roof insulation. To be effective, this barrier must be warm enough to maintain temperature above the dew point which means sufficient insulation needs to be installed over the barrier. These barriers are especially important in commercial roofs as condensation penetrating roof materials can lead to considerable damage in the forms of both corrosion of materials and the growth of microorganisms.
All construction professionals should carefully consider the choices of vapour barriers prior to the beginning of construction works, as a well specified product will support energy efficiency and the lifeline of all materials. POWERLON® UltraBlock is a range of thermo-reflective air barriers and vapour control layers incorporating encapsulated aluminium foil or metallised barrier layers to maximise energy efficiency. The reflective foil surface improves the insulation characteristics of the installation, reflecting heat back into the building.
Characteristics:
- High water vapour resistance
- Range of membranes to cover all build types
- Reflective foil layer for enhanced retention of thermal energy
- Exceptional water vapour resistance
- Self-adhesive version available
- CE marking
PRODUCT | Colour | Weight | Tensile strength |
Nail tear resistance |
Temperature range |
Water vapour resistance |
Water vapour permeability |
UV | Sizes | Roll weight | Pallet quantity |
Thermal reflectivity |
Thermal emissivity |
|
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
UltraBlock 300 | Silver/ Green |
270 | MD 400/XD 300 MD 290/XD 300 |
MD 140/XD 230 MD 260/XD 265 |
-40 to +70 | >25,000 MNs/g BS 3177 approx. 0.0007 Perms (USA) |
< 0.01 EN 1931 EN 12572(c) |
3 months | 2.0 x 50 | 28 | 33 | 0.54 | 0.46 | |
UltraBlock 250 | Silver/ White |
114 | MD >150 XD >150 |
MD >100 XD >100 |
-40 to +70 | ~600 MNs/g Sd 120m EN 1931/EN 12572,C |
NA | 3 months | 1.5 x 50 2.7 x 50 3.0 x 50 |
9 16.1 18.1 |
39 39 39 |
0.75 | 0.24 | |
UltraBlock 200 | Silver/ Clear |
104 | MD 185 XD 184 |
MD 110 XD 87 |
-40 to +70 | >630 MNs/g BS 3177 |
0.5 ASTM F 1249-90 |
3 months | 1.6 x 50 | 8.8 | 50 | 0.64 | 0.36 | |
UltraBlock SA | Silver/ White |
180 (excl liner) 240 (incl liner) |
MD 650 XD 520 |
MD 255 XD 250 |
40 to +70 | >7,500 MNs/g Sd >1,500m EN 1931/ EN 12572, C |
NA | 3 months | 1.5 x 100 | 37 | 20 | NT | NT | |
VCL 250 | Clear | 285 | MD 585 XD 430 |
MD 250 XD 300 |
-40 to +70 | 530 MNs/g
BS 3177 |
0.39 DIN 53122 |
3 months | 2.0 x 50 | 29 | 33 | NA | NA | |
VCL 170 | Clear | 210 | MD 465 XD 415 |
MD 310 XD 355 |
-40 to +70 | 336 MNs/g
BS 3177 |
0.61 DIN 53122 |
3 months | 2.0 x 50 | 21.5 | 33 | NA | NA |
Powerlon Air & Vapour Control Layers VCL Projects
Tameside College
ITP supplied our VCL 250 vapour control layer as a protective solution underneath a stunning façade design at the Advanced Technologies Centre (ATC), Tameside College’s £10.5 million learning facility in Greater Manchester.
Bournemouth University
ITP’s advanced vapour control layers have been used as part of a major development plan at Bournemouth University, where a multi-million-pound investment in new facilities is supporting and enhancing the learning and working environment for students and staff.
World Class Stadium for World Cup 2022
Powerlon Vapour Control Layer 170 at Al Rayyan Stadium, Qatar
Wonderland of Snow in Oman
Powerlon VCL250 providing high vapour resistance for a new snowpark in Muscat, Oman.