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You are here: Building Insulation - Roofing - Ballested paved roofs

Technical Specifications

  • Prepare installation procedure
  • Screen or vapour barrier
  • Lay down STIFERITE’s Class B panel
    (alternative: STIFERITE’s Class S)
  • Installation of waterproofing mantle made of two bituminous membranes with polyester fibre reinforcement, minimum 4mm thick
  • Positioning of floating squares of washed gravel (40 mm thick), placed over suitable supports only after inter-positioning of membranes as separating layers for protection and levelling

Instructions and Guidelines
Roof top terraces increase the amount of living space, but must ensure comfort and safety of the ambient below it.

In order to guarantee a secure waterproofing seal and eventual maintenance to the finished package, it is of great importance to carefully design and  install a perfect package

Also see: the installation procedure

The tables indicate the suggested thickness of Stiferite’s panels based on

  • Climate Zones
  • Current legislative set limits of thermal transmittance
  • And the following composition of the structure:

Suggested thickness

DLgs 311/06

TAX deduction MD 65%
DM 26/10/2010

A 60 mm 80 mm
B 60 mm 80 mm
C 60 mm 80 mm
D 80 mm 90 mm
E 80 mm 100 mm
F 80 mm 100 mm

Note: For different composition of structures or material, we suggest using the calculation program available online (see: Thermal transmittance and verifications of condensation with Glaser method)





Tie point of Wall and Walk-on Roof/Terrace