Steep roof insulating system puren St-blau

´This roof insulating element with a top value of TCG (WLS) 026/027 for high thermal insulation is the baseplate for a 2-layered roof construction and highly suitable for insulating intricate roof landscapes causing low cut-off waste

puren® St-blau is made of high-performance PUR/PIR rigid foam insulating material (polyurethane) with double-sided diffusion-open special fleece coating.  It requires for a diffusion-open roof-deck felt to be installed to achieve a draining layer.




  • Application type DAD
  • Building material class B2
  • Full-surface insulation TCG (WLS) 026/027 for installation onto rafters with no thermal bridging
  • High insulation performance at low material thicknesses
  • All-around tongue+groove joint
  • Insulation element can be used on either side for economical fitting with low cut-off waste
  • Design versions for low-energy construction
  • Can be combined with any type of insulation between rafters

Available formats:
Outer dimensions wide 2400 x 1020 mm
Fitting dimensions wide 2380 x 1000 mm

80 - 180 mm

You have more questions ?

Please contact here your Regional Sales Manager.


Declarations of Performance

puren gmbh
Rengoldshauser Str. 4
88662 Überlingen

Tel: +49 (0)7551 / 80 99 0
Fax: +49 (0)7551 / 80 99 20