The Derbigum 4 mm 8 m² 1.1 m Large SP FR item is a 4 mm thick bituminous waterproofing membrane, specially designed for roofs.
It offers 8 m² of coverage with a width of 1.1 metres, and features an SP (soft system) finish for easy installation.
This product is also classified FR (flame retardant), thus offering reinforced protection against fire, while ensuring a durable seal that is resistant to climatic conditions.
