Flat mastic asphalt inverted roof on concrete deck

Flat roof construction comprising:

Mastic asphalt inverted roof covering system

• 50 mm Paving slabs
• 2 mm Filter layer
• 150 mm XPS foam board
• 30 mm Mastic asphalt
• 2 mm Reinforced bitumen membrane

Concrete deck

• 150 mm In situ concrete