Spano Durelis Vapour Block

Product Description

DURÉLIS VapourBlock is a 2400 x 1196 x 12mm (2.87m2) high density chipboard with a factory fitted transparent airtightness and vapour control layer on one side. This surface applied finish guarantees consistent airtightness and vapour control. It also eliminates the requirement for additional vapour control membranes to be applied on the internal side. VapourBlock is for internal use. It is classified as a structural board which is suitable for use in humid conditions (P5) equivalent to OSB3.

Delivering higher levels of airtightness is central to realising low energy or Passivhaus levels of energy performance in buildings. This can be attained using a range of materials depending on the construction type, namely, a continuously sealed vapour control layer, a continuous plaster layer directly applied to a masonry wall or an airtight structural board, such DURÉLIS VapourBlock. A structural board has the advantage that it fulfils 3 primary requirements in one step, namely:

  1. Vapour control,

  2. Structural requirements,

  3. Airtightness

Airtightness - A Visual Comparison Test 

Up until recently it was generally accepted that taped and sealed 18mm OSB3 was a reliable airtightness layer, with which one could attain the stringent Passivhaus criteria for airtightness of less than 0.6 Air Changes Per Hour at 50 Pascal. Experience on site coupled with a study by the Building Physics Laboratory at the K.U. Leuven showed that OSB sheaths are not always adequately airtight. It concluded that, if the manufacturer of the panel cannot provide an airtightness guarantee, an allowance must be made for significant air leakage directly through the panels themselves.

Following from this study the Research and Development team at Spanotech recently developed a technical board which specifically addresses these issues. When aiming for best practice levels of airtightness, there is no room for compromise. Based on our own experience and feedback from contractors on a number of sites, some projects failed to meet their airtightness requirements due to unforeseen air leakage through OSB, even 18mm thick. Initial tests in Ireland are already yielding positive results. With DURÉLIS VapourBlock specifiers and contractors can be assured the boards will provide a consistent airtight layer to the highest industrial standards.

The board is CE marked and production quality is checked daily. DURÉLIS VapourBlock is manufactured to the highest quality standards to comply with ISO 9001.  

Enquire about this Product Find Your Nearest Installers

Technical Detail

Materials Wood particle board
Vapour Resistance: 14.7 MNs/g
Fire Rating D-s2
Thermal Conductivity: 0.13W/mk
3rd Party Accreditation: CE
Colour: Green with glossy finish
Sheet Dimensions: 12mm x 1196mm x 2400mm (2.87m2)
Density: 720
Air Permeability (EN 13829) 1/h/m2: 0.001 (18mm OSB3 = 0.0049)


Data Sheets

Product Benefits Product Benefits General Documents
Unilin VapourBlock Safety Datasheet 2019Unilin VapourBlock Safety Datasheet 2019Unilin VapourBlock Safety DatasheetTechnical Data Sheet
Vapour Block Datasheet 2019Vapour Block Datasheet 2019Technical Data Sheet