Cold insulation side
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Reflective membranes

Miofol 170AG

Miofol® 170AG is a micro-perforated, water-repellent and permeable aluminium membrane.

1,50 x 50 m Article no. 6617015050
2,60 x 50 m Article no. 6617026000
3,10 x 50 m Article no. 6617031050


Miofol® 170AG is a micro-perforated, water-repellent and permeable aluminium membrane. The back of the membrane has been reinforced with a polypropylene webbing, which has been overlaid with an LDPE coating. The aluminium side is coated with UV-stabilised LDPE, which means the aluminium can resist the negative effects of alkaline. The aluminium surface reflects heat radiation, which helps to ensure higher heat resistance. The unique micro-perforations, and the density of these perforations, ensure the best possible water-resistance in this category, while retaining high permeability.


Miofol® 170AG is used on the outside of facades (cold side) as water-repellent and permeable layer. Miofol® 170AG can be used behind brick facades as well as closed facade panels. The aluminium layer, in combination with the cavity in the facade, helps to improve insulation. The water-repellent membrane protects the construction and ensures effective insulation and moisture control.


Miofol® 170AG is micro-perforated and must thus be placed away from hard surfaces. For example, in facades with a soft surface, like mineral wool, the membrane can be placed directly against the soft surface. The reflective side of the membrane must be placed so it faces the cavity; thus the logo facing inwards. This means the logo should NOT be visible from the outside. Maintain a cavity of 20 mm to 40 mm for the best possible heat resistance. Miofol® 170AG must be placed in the same way as roof tiles. Keep an overlap of minimum 150 mm and maximum 200 mm. Use staples to attach Miofol® 170AG to the construction. Use VAST-R® Aluminium tape basic to tape over staples and overlaps. Use VAST-R® Butyl tape and/or Tyvek® FlexWrap tape to make openings and joints wind- and watertight. VAST-R® Butyl tape must be placed under the battens to create an effective water barrier, and to extend the lifespan.


Reflective on one side


Extremely high pull- and tear-resistance

Resistant against alkaline

Area subject to limited heating during the summer

Improved insulation

Water-repellent, permeable and insulating

Unique micro-perforations



Weight 170 gr /m²

Fire class F

Water tightness W2

Water vapour resistance Sd 0,32 m

Water vapour transmission 75 g / m² / day

Tensile strength machine direction 410N / 50 mm

Tensile strength cross direction 375N / 50 mm

Elongation machine direction 15%

Elongation cross direction 14%

Tear resistance machine direction 405N

Tear resistance cross direction 375N / 50 mm

Temprature resistance -40°C/80°C

Construction phase 3 months

R-value (through 20 mm cavity) 0,57 m² K / W

Emissivity 0,063

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