Bitumen laminate surface

FF-PIR BI insulation panels were designed for insulating low pitch roofs, as the entire surface of the panel is suitable for welding or strip welding roofing sheets. The panels are suited for use in both renovation and new construction. The panels are coated with a diffusion-proof plastic laminate on both sides, which does not contain metal. The panel was designed specifically for use of roofs with bitumen sheeting, but it can also be used in other types of construction. The fire class of the insulating foam component of FF-PIR insulation is D-s2, d0.

FF-PIR BI insulation panels are produced in widths ranging from 50 to 100 mm at 10 mm intervals. The panels measure 590 x 2 400 mm. The FF-PIR BII panel features flat edges, while the FF-PIR BIL panel has a rabbet edge.

Other than stock products are manufactured on order, and the minimum order size is 30 m3. The delivery amount for any FF-PIR BI special products may vary by +0–30 m2 in relation to the ordered amount.

Declared thermal conductivity (λDeclared) of the panels:
< 80mm: 0.027 W/mK
81–119 mm: 0.026 W/mK
≥ 120 mm: 0.025 W/mK

FF-PIR Insulation / Roofing Structure Combinations Certified for Fire Class BROOF (T2)

Insulation Dual-layer bitumen Sheet
FF-PIR BI X Icopal PolarTop Flamesafe + Polar to be welded
FF-PIR BI X Kerabit 4000 Base + Kerabit 5000 Top FR
FF-PIR BI X Kerabit 3000 U + Kerabit 5000 Top FR
FF-PIR BI X Eurogum K-MS 170/4000 + Eurogum K-PS 170/5000


FF-PIR, Bitumen laminate surface

  • Dimensions
  • Technical details
Value Unit According to EN 13950 Standard
Length 2400 mm
Width 590 mm
Thickness 50-150 mm
Value Unit According to EN 13950 Standard
Thermal conductivity EN 12667
λ Declared 0,025-0,027 W/(m K) EN 12939
< 80 mm paksut levyt 0,027 W/(m K), 80 – 119 mm paksut levyt 0,026 W/(m K), ≥ 120 mm paksut levyt 0,025 W/(m K)
Thermal resistance, Rᴅ 1,85 – 6,00 m²K/W EN 12667, EN 12939
Compressive strength, short-term 45 days, ≥ 30mm > 120 kPa CS(10/Y)120 EN 826
Design stability DS (70,90)4 EN 1604
Design stability DS (-20,-)2 EN 1604
Proportional change in width ≤ 0,5 %
Proportional change in length ≤ 2 %
Proportional change in thickness ≤ 2 %
Water absorption (FINNFOAM core) in long-term immersion < 2 til.-% WL(T)2 EN 12087
Fire class NPD Euroluokka EN 13501-1
Fire class of the foam D-s2, d0
Service temperature -50 ... + 100, lyhytaik. + 200
Indoor air emission class M1