FAQs

AIRTIGHT can be used as the only racking panel, installed on the warm side of the insulation and therefore can be used as the only sheathing panel in a wall build-up.

MEDITE recommends that breather membranes from reputable suppliers are used, the membrane should be:

• CE marked,
• Compliant with the requirements of BS EN 13859-2:2014 - Flexible sheets for waterproofing. Definitions and characteristics of underlays. Underlays for walls.
• If a high reflectivity membrane is used, the thermal performance should be measured after ageing of the reflective surface.

Most breather membrane supplier would comply with those performance requirements.

NO. SMARTPLY AIRTIGHT is certified as an airtight panel. MEDITE VENT is not airtight.

NO. MEDITE VENT can be used as the only sheathing panel in as it is a racking panel tested to EN 594. It is a breathable panel suitable for use in service class 2 conditions.

MEDITE VENT is not an airtight panel and so will let air flow go through.

In cold temperate climates in Europe MEDITE VENT should be installed on the external side of the wall build up to allow water vapour to escape to the outside and avoid condensation in the insulation and structure.

NO. MEDITE VENT is a panel that can be used in humid (service class 2) conditions.

MEDITE VENT is produced to a lower density than most standard MDF to provide lower vapour resistance while maintaining sufficient strength as a racking panel.

As with all wood-based panels for use in humid conditions wetting should be avoided. If the panel is wetted during installation it is recommended to allow the panel to dry before the permanent covering is installed.

YES. The certified passive house wall systems are certified with SMARTPLY AIRTIGHT and MEDITE VENT included. All other wall and roof elements are generic, with only the minimum thermal performance as a requirement.