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PHS Apollo 2 Vapour Control Membrane

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PHS Apollo 2 Vapour Control Membrane enables airtightness and vapour control in roof and wall constructions.
PHS Apollo 2 Vapour Control has an optimum fixed vapour resistance level of Sd 27m.



Declaration of performance

£66.70 net

Out of stock

SKU: AR9094F

Apollo 2 Membrane

Control Membrane & Vapour Barrier for roofs, walls and floors.

Why Apollo ?

Apollo 2 is a popular choice for walls, floors, and warm roofs. It is the most cost-effective control membrane on the UK market, capable of meeting Passive House airtightness standards at a fraction of the usual price.
Apollo 2 has been used in a wide range of sites throughout the UK and Ireland, from timber frame houses to retrofit bungalows, and has proven to be one of the best airtightness solutions in the UK, achieving excellent results at a fraction of the cost.


PHS Apollo 2 is a control membrane, placed on the warm side of the insulation and ideally suited for use in lofts, insulated floors and walls, with a fixed sd Value of 27 making it ideally suited as a control layer.




Features & Benefits

  • Cost-effective solution for airtightness
  • Controls moisture and air leakage
  • Fixed SD Value of 27m


Apollo 2 Installation Guidelines


  1. The Apollo membrane is applied to the building envelope on the warm side of the insulation.
  2. The membrane should be rolled out to the correct length and cut with a sharp knife.
  3. The membrane should be applied to the timbers cross-wise to the joists/rafters, with the graphics facing the installer. 970 Double Sided tape at 400-600mm centers should be used, otherwise staple every 150-200mm.
  4. Creases should be removed and reasonable tension applied to the membrane.
  5. The membrane should overlap by approx 100mm the membrane graphics on the membrane mark the 100mm spot where the membranes should overlap.
  6. The membrane should be extended approx. 100mm down the external wall without any stress on the material.
  7. A 6-8m bead of Fortax 6400 sealant should be applied to the masonry surfaces to fix the membrane.
  8. Gently press the membrane against the Sealant and allow to dry.
  9. Ensure there is sufficient stress relief in the membrane corners and trim back accordingly.
  10. Any overlaps should be joined with PHS Argo Joining Tape.

Technical Details

Tensile strength (DIN EN 12311-2)*
Lengthwise: 207N / 50mm
Crosswise: 136N / 50mm
Tear strength (DIN EN 12340-1)*
Lengthwise: 119N
Crosswise: 195N
Temperature range: -20C to +80C
Sd value: 27m – 0.2m (DIN EN 1931:2000)
Fire performance: class F
Water resistance: passed
Grammage: 110g/m2 (±7 %)
CE certificate: passed
Moisture resistance:  u = 108074
Water vapour resistance: Zp = 142.109m2.S.Pa/kg
Core: 72 mm inner core diameter


    •  Store in dry rooms from +5C to +25C, 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 PHS Double Sided Tape,
    • PHS Argo Joining Tape or a suitable PHS Grommet should be used for penetrations,
    • For bonding barrier overlaps, penetrations and repair spots, PHS Argo Joining Tape or a similar tape is recommended,
    • For connections co concrete or masonry PHS Internal Adhesive Sealant is recommended,
    • Ensure there is a 100mm overlap of the membranes and tape with PHS Argo Joining Tape or another suitable tape.


Part Number: Size:  Box Quantity:   Barcode:
AR 1.5mx50m 1

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