Sepa® solar

Sepa® solar is Klober’s new reflective air barrier and vapour control layer. With a vapour resistance of over 500 MNsg, it far exceeds the requirements set out in BS9250 (Code of Practice for the design of the airtightness of ceilings in pitched roofs). Its reflective surface reduces heat loss through the roof. Moreover, when combined with other products in Klober’s airtightness range it will help you minimise energy loss


KU0092  |  50 x 1.5m (75m2)  |  13.5kg 20 rolls p/pallet

  • Use in conjunction with Klober's other airtightness products to minimise energy loss 
  • 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
  • Reflective surface increases constructions's thermal resistance when facing into the services void or room. With a vapour resistance of 500> MNsg, far exceeding requirments of BS9250
  • Prevents large volumes of watervapour entering a construction from the interior, particularly during the drying our period
  • Provides support for insulation boards and quilts

Composite woven, non-woven, foil

Before Sepa® solar 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 reflective surface facing the interior and a services void. At either edge of the structure, leave a 150mm overlap to allow Wallint® solar 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 that laps are sealed using a tape eg Permo® TR, that it is sealed at all abutments/junctions using either tape eg Permo® TR or Pasto® sealant. If parging, first turn Sepa® solar down the face of the wall, fix plaster stop bead on top of Sepa® solar 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 Sepa® solar to achieve an airtight seal.
Sepa® solar 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, Sepa® solar 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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