Newly certified Manufacturers Certification criteria

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Certified since Nov. 19, 2015
Climate zone Cool, temperate
Type Attic Staircase
Efficiency Class phA+
Material Timber
UW 0.51 W/(m2K)
Open type


Attic stairs made of pinewood with thermally seperated metal fittings and 3 sealing-levels (EPDM). Attic stair hatch of Styrofoam (λ = 0.031 W/mK) with a coating of high density fibreboard (HDF). Sorrounding insulation (λ = 0,035 W/mK) to ceiling structure connection.

Name Frame width U-Value Ψ-Value Frsi-Value
Bottom 40 mm 0.52 W/(m²K) 0.000 W/(mK)
Top 40 mm 0.52 W/(m²K) 0.000 W/(mK)
Lateral 40 mm 0.52 W/(m²K) 0.000 W/(mK)

FAKRO Sp.z.o.o.

ul. Wegierska 144a
33-300 Nowy Sacz

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