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Proven age tested airtightness tape should be used with PROPASSIV. The tapes specifications for various construction details are provided in the installation guide with a non-exhaustive list of suppliers. The guide is available on the website.

It is not necessary to tape over the fixings used to install PROPASSIV providing that the fixings have not been removed and reinserted or predrilled.

PROPASSIV is 12.5mm in thickness and is not available in other thicknesses. The 12.5mm thickness achieved the required airtightness and so it cannot be made thinner as it would impact the airtightness property, and increased thickness would not provide any further benefit but would add costs.

PROPASSIV 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.

PROPASSIV is installed on the warm side (usually the internal side) of the construction as the product is also a vapour control layer.

PROPASSIV was made airtight by developing a specific and patented OSB recipe which prevents air passage through its thickness unlike standard OSB panels.

The green layer of PROPASSIV is a UV cured coating providing increased and constant vapour diffusion factor. In addition, it provides a smooth and durable surface for taping the connections. Independent test showed that the taped joint was as airtight and durable as the panel itself.

PROPASSIV was tested to EN 13501-1 and the reaction to fire classification is D,S1,d0.

No. The coating is UV curable and is used and applied in controlled conditions and environment and cannot be provided in liquid form.

PROPASSIV is an OSB/3 panel and is not available in OSB/4 grade which would not provide further benefits.

No. PROPASSIV can be used in humid conditions (service class 2).