Non-combustible inverted roof insulation with ballast finish
Fire safety and thermal performance are key considerations for inverted flat roofs. For accessible maintenance roofs with gravel ballast, compliance with fire regulations is essential. FOAMGLAS® INVATHERM™ is an A1‑rated, non‑combustible insulation that can be combined with gravel ballast to help limit the risk of fire spread. Its closed‑cell glass structure is watertight, supporting stable thermal performance even under wet conditions, while protecting the waterproofing layer.
System benefits
- Fire safety: Euroclass A1 rated, non-combustible, non-toxic insulation solution for inverted roof systems.
- High compressive strength: Our cellular glass insulation material has a high compressive strength and is capable of bearing pedestrian traffic loads from a balcony or terrace without degradation or deformation.
- Versatile: Suitable for use on all types of inverted roof construction, from maintenance access roofs with a gravel finish or paving on pedestals, to balconies and terraces with multiple finishes on pedestals.
- Sustainable: Our insulation material is moisture resistant, protecting buildings and occupants. The average recycled content for FOAMGLAS® products is 50%*.
- Quality: Owens Corning FOAMGLAS® has decades of experience manufacturing cellular glass. Our robust, durable and high-quality core material delivers its performance for the life of the building and beyond, with minimal maintenance costs.
* Weighted average based on total mass of final products in the market. Calculation based on ISO 22095 rolling average percentage method.
