Monarflex Vapour check membranes

Monarflex Vapour check membranes

These membranes containing a special co-polymer coated, spun bond, non-woven reinforcement. It is designed to provide both an effective air leakage barrier as well as regulating vapour control properties.

Typically, many damages to buildings are caused by moisture from condensation. It is therefore of vital importance that any moisture that penetrates into the building envelope (diffusion) or residual moisture from the construction phase can dry out effectively. The Vapour Check membranes provide this protection due to its low, but dynamic regulating vapour resistance and can be used in new build as well as in refurbishment projects as a retrofit membrane.

The membrane has a reinforced structure making it extremely durable during installation and can easily be shaped without stretching or tearing around fixing points. The Winter period the dynamic performance of the Vapour Check membrane will allow a controlled amount of vapour through the building envelope which can be ventilated away through the permeable roof underlay without overloading the membrane and causing unnecessary condensation risk. In the Summer period the dynamic performance of the Vapour Check membrane is reversed as the vapour drive is from outside to inside. In this situation the membrane will allow a controlled amount of vapour to pass into the building which is ventilated away by natural ventilation. The Vapour Check membrane will provide this protection whilst remaining completely airtight. The Vapour Check membrane is installed on the warm side of the insulation, where it can block air leakage and help meet the building regulations and standards. It thereby improves the thermal performance of the insulation by reducing convection flow.

Vapour Check membranes Product Range

  • MonarVap SD2
  • MonarVap SD2 RE
  • MonarVap SD5
  • MonarVap SD5RE
  • MonarVap SD10
  • MonarVap SD10RE

All the Vapour Check membranes MonarSmart products classified according to EN 13984 and have E fire classification according to EN 13501-1.

At Monarflex "we are setting the standard"

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Monarflex contact details

Monarflex s.r.o.
Továrenská 1
943 03 Štúrovo

Slovak Republic

Phone + 421 36 7563865

UK & Ireland

Please visit the dedicated website at

Tel: 0161 8654444 (UK office)

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