Wallint® 50

Klober’s Wallint® 50 is a combined air barrier and vapour control layer. It has a vapour resistance of 250MNsg, meeting the requirements of BS9250 (Code of Practice for design of the airtightness of ceilings in pitched roofs). As even thicker layers of insulation are installed to comply with more demanding Building Regulations, so it becomes increasingly important to provide an air barrier and vapour control layer on the warm side of the insulation. Wallint® 50 has been especially developed for this purpose


KU0065  |  50 x 1.5m (75m2)  |  9.5kg 20 rolls/pallet

  • Use in conjunction with Klober's other airtightness products to minimise enerhy lose
  • Prevents large volumes of watervapour entering a construction from the interior, particularly during the drying out period
  • Provides support for insulation boards or quilts
  • Meets requirments of BS9250


Composite PP-spun fleece with coating

Before Wallint® 50 is installed, check the moisture content of the timbers is less than 20%. Fix on the warm side of the insulation and rafters, with the printed smoother surface facing inwards. At either edge of the structure, leave a 150mm overlap to allow Wallint® 50 to be sealed to adjoining walls. Roll-out with a horizontal headlap of 150mm. Fix to rafters/ceiling joists using non-corrosive fixings eg staples. Ensure laps are sealed using a tape eg Permo® TR. Ensure that Wallint® 50 is sealed at all abutments/junctions using either tape eg Permo® TR or Pasto® sealant. If parging, first turn Wallint® 50 down the face of the wall, fix plaster stop bead on top of Wallint® 50 and then parge on top. Any holes or tears in the air barrier/vapour control layer should be repaired with Permo® TR tape. Where pipes pass through use Klober’s Pipe Sealing Collar and tape edges to Wallint® 50 to achieve an airtight seal. Wallint® 50 should cover the entire internal timber frame area of the rooms in the roof and, where applicable, link with vapour control layer in the wall below to form a continuous air barrier. For refurbishment projects, Wallint® 50 should be laid vertically either from ridge to eaves or vice versa. This is to allow small sections of the roof to be worked on. Joins should be taped using Permo® TR and sealed at the eaves using Pasto® or Permo® TR

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