ConstructionInteriorDecorsSample serviceDealersInspirationDownloads

HydroFlam VapourBlock

Fire-retardant, airtight, reinforcing, moisture-resistant construction board with integrated vapour barrier
  • Description
  • Applications
  • Technical specifications
  • Stock range
  • Characteristics

HydroFlam VapourBlock is a HydroFlam construction board with an industrially applied, transparent vapour barrier on one side. The VapourBlock vapour barrier has a constant high μ value of 185 (12mm) over the whole surface of the board. This is in contrast to traditional wooden board materials for which the μ value is significantly lower and can vary considerably.

Combined with a TopFinish surface, this ensures that the board is extremely airtight (< 0.001 m³/ m²/h/Pa at 50Pa;12 mm). It is important to always seal all joints and cracks with suitable airtight tape.

HydroFlam VapourBlock boards are suitable for applications in service class 2 (limited temperature and relative humidity) and biological hazard classes 1 and 2 of EN Standard 335-3.
HydroFlam VapourBlock is an ideal solution for applications in timber-frame construction and in low-energy passive house building. Using HydroFlam VapourBlock on the inside of a building, and vapour-permeable wood fibreboard such as FiberTech Top on the outside, offers the advantage of combining an air barrier, vapour barrier and structural reinforcement, all combined in a single layer of board.

HydroFlam VapourBlock is suitable as a structural board in applications where low reactivity to fire and flame spread are important (roofs, walls, stairwells, exit routes, lift shafts, corridors, ...) and where a higher resistance to fire is required (fire doors, fire walls …).

Always use the recommended tools when sawing, milling or drilling HydroFlam boards. Fire-retardant products may cause deposits on tools and shorten service life.
General characteristics + Norm Unit Average values
Thickness EN 324-1 mm 12
Moisture level EN 322 % 6-10
Airtightness at 50 Pa EN 13829 m³/m²/h/Pa <0,001
Thermal insulation value EN 13986 W/m.K 0,144
Sound absorption coefficient EN 13986 250-500 Hz: 0,10 ; 1000-2000 Hz: 0,25
Atmospheric sound insulation EN 13986 dB 27,4 (18mm)
Water vapour permeability µ EN iso 12572 (dry cup) 185
Reaction to fire EN 13501-1 B-s2,d0
Formaldehyde content EN 210 mg/100g E1
Technical characteristics + Norm Unit 5/95 percentile values
Bending strength EN 310 N/mm² 18
Internal bond EN 319 N/mm² 0,45
Bending stiffness EN 310 N/mm² 2550
Swelling/24h EN 317 % 11
Internal bond after cyclic test EN 321 option 1 N/mm² 0,25
Swelling/24h EN 317 % 12
TopFinish Quantities per pack
Thickness EN 324-1 12
2800x1196 72
HydroFlam VapourBlock is available on demand and can be made to order. Please contact our sales team for more information about the technical capabilities regarding custom thicknesses and dimensions, and for minimum order requirements.
FR
Fire retardant
Unilin Panels offers solutions for flame spread, flashover, smoke development and burnthrough time that meet the most stringent fire standards. The fire-retardant products of Unilin Panels are CE marked and regularly inspected by national and international agencies. Certificates and test reports are available upon request.
Vapour diffusion
Vapour barrier
Airtightness
Airtight
Material type
Chipboard
Norm
P5
Load-bearing applications in humid conditions
Finishes
VapourBlock
VapourBlock is a transparent, industrally applied vapour barrier. The VapourBlock vapour barrier has a constant high μ value of 185 (12mm) over the whole surface of the board. This is in contrast to traditional wooden board materials for which the μ value is significantly lower and can vary considerably.
TopFinish
The heat-treated TopFinish surface (TF) creates an extra-hard, sealed surface with greater impact resistance, and it is easy to clean. The increased concentration of natural paraffin in the surface increases its moisture resistance. Our boards with a TopFinish surface also score highly for air tightness. These advantages mean that boards with a TopFinish surface are particularly suitable for building applications.
Structural
For structural applications
MR
MR
Use in humid conditions

Finishes
Tongue and groove
The tongue and groove profile ensures high stability and simple installation. The system makes it possible to nail or screw the panels blind.

Downloads