Description
Unilin HydroFlam VapourBlock
HydroFlam is an MUF-glued, fire-retardant chipboard that is extremely well suited to structural applications in damp spaces. The board only displays minimal expansion and swelling under the influence of high relative humidity. 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.
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) making an ideal solution for applications in timber-frame construction and in low-energy Passivhaus building. Using HydroFlam VapourBlock on the inside of a building, and vapour-permeable wood fibreboard on the outside, offers the advantage of combining an air barrier, vapour barrier and structural reinforcement, all combined in a single layer of board.. It is important to always seal all joints and cracks with suitable airtight tape.
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