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StoTherm Classic®

Robust external wall insulation system with maximum crack and impact resistance
StoTherm Classic®

Products and systems vary from location to location due to local building regulations and standards. We strongly advise you to make contact, your local expert will be happy to consult you on standards and approval.

System advantages

  • large seamless facade surfaces possible
  • highly resistant to mechanical stress
  • system reliability - more than 100 million m² in use worldwide
  • crack-resistant thanks to a cement-free system build-up
  • highly resistant to microorganisms (algae and fungi)
  • intense, dark colour shades possible
  • huge variety of creative possibilities using colour shades, textures, and materials
  • cement-free, ready-to-use system components
  • economic as no intermediate or paint coat required
  • clean building site thanks to a system-approved PU foam adhesive technology
  • resistant to hail, storms, and hurricanes according to the FIBAG simultaneous test
  • water vapour permeable
  • complete range of system components for efficient supply and delivery

Download centre

For further details, support with project – specific u-values, BIM elements and project advice, please feel free to contact us here

  • Construction details
  • BIM files
  • Specification texts

Construction details

  • Construction details

BIM files

  • Facade insulation systems in LOD200

  • Three-dimensional facade elements in LOD400

Specification texts

  • Acrylic render
  • Intelligent Technology Finish


Thermal protection

  • approved EPS insulation board

Reaction to fire

  • limited combustibility
  • class B, C in accordance with EN 13501-1, depending on system build-up
  • additional fire protection measures may be required

Impact resistance

  • outstanding impact resistance of 15 joules (single layer) and 60 joules (two layers)
  • highest hail impact resistance class 5 in the appropriate system build-up
  • ball-impact resistant in accordance with DIN 18032-3
  • resistant to hail, storms, and hurricanes according to the FIBAG simultaneous test

Wind load

  • can be used with increased wind loads provided there is additional suitable fixing

Other properties

optional Lotus-Effect® Technology

  • 06315
  • 22334_stotherm_classic


Area of application

  • new and existing buildings up to high-rise level
  • all types of public, private and commercial buildings
  • to be used in accordance with the local building rules and regulations
  • passive house certified
  • suitable for all climate zones


  • masonry, e.g. brick, calcium silicate masonry units, cellular concrete, fair-faced masonry and masonry veneer
  • concrete, concrete slab construction
  • timber construction (solid, frame and panel construction)
  • steel construction (column and framing)
  • lightweight construction
  • existing external wall insulation systems (doubling-up of insulation)


  • bonding
  • bonding and fixing with anchors


  • cement-free, ready-to-use system components
  • no intermediate coat required
  • special protection against algae and fungi with a double coat of paint
  • suitable for application by machine
  • complete selection of detail solutions

Creative possibilities

Design options

  • Acrylic renders, silicone resin renders, and renders with Lotus-Effect® Technology in stippled render texture, rilled render texture, or in free-style textured render
  • resin brick slips and 3D facade elements made of Verolith granulate
  • natural stone tiles, brick slips, and ceramic tiles possible on agreement
  • through-tinted renders possible

Colour spectrum

  • tintable in accordance with the StoColor System
  • intense, dark colour shades (light reflectance value < 25 %) possible



The relevant European and/or national approvals apply.

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We are Sto, how can we help you?

  • Audra Lee
    Audra Lee Sto Singapore
  • Otto Norling
    Otto Norling Sto Sweden
  • Wei Zhuang
    Wei Zhuang Sto China
  • Grant Littlejohn
    Grant Littlejohn Int. project support London
  • Mark Harris
    Mark Harris Sto Gulf Region
  • Murat Yarar
    Murat Yarar Sto Turkey

Global presence. Local knowledge.
Feel free to contact us.