Non-combustible inverted roof insulation tested in extreme conditions
FOAMGLAS® INVATHERM™
Inverted roofs combine durable waterproofing protection with long-term thermal performance. By placing the insulation above the waterproofing membrane, the roof build-up protects critical components from temperature fluctuations, mechanical damage and weathering. FOAMGLAS® cellular glass insulation provides a non-combustible, moisture-resistant solution for inverted roof systems, helping designers achieve long-lasting performance across a wide range of roof applications.
How does an inverted roof work?
In an inverted roof system, the waterproofing membrane is installed directly on the structural deck and protected by a layer of insulation placed above it.
This configuration offers several advantages:
- Protection of the waterproofing layer from thermal stress
- Extended roof service life
- Reduced maintenance requirements
- Suitable for roofs with pedestrian access, green roofs and technical installations
- Non-combustible insulation solution with FOAMGLAS®
Explore FOAMGLAS® Invatherm™ Systems
FOAMGLAS® Invatherm™ solutions are designed specifically for inverted roof applications. Discover the most suitable system according to your roof use and finish.
Technical Roof with Gravel Ballast
A practical solution for maintenance-access roofs where ballast protection is required.
Podium roof for pedestrian access
Designed for technical roofs requiring regular inspection and maintenance access.
Roof terrace with extensive greenery
Ideal for roof terraces and podium decks exposed to pedestrian traffic.
Roofs with pedestal paving for maintenance access
Combines sustainable roof design with vegetation and long-term thermal performance.
Why Choose FOAMGLAS® Invatherm™?
FOAMGLAS® Invatherm™ combines the benefits of cellular glass insulation with the proven advantages of inverted roof construction.
Key characteristics include:
- Non-combustible insulation
- Zero water absorption
- Dimensional stability
- High compressive strength
- Long-term thermal performance
- Durable protection of the waterproofing membrane
Austrian flat roof project aids development of new non-combustible inverted roof insulation for UK market
An extensive multi-year trial was carried out on the flat roof of the joinery workshop, which is owned by Mr. Hannes Guggenberger and used by his company. The building’s microclimate exposed the cellular glass product to wide temperature variations and high levels of humidity. The findings of the research painted an accurate picture of how the insulation behaves.
DESIGNING AN EFFECTIVE INVERTED ROOF
Discover how to achieve optimal performance for flat roofs. Our white paper addresses critical factors: thermal efficiency, watertightness, drainage, fire safety, and structural integrity.
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