The LORO-X VARIOFIT retention roof drain with retention pipe and retention openings enables planned rainwater retention on the roof and relieves the underground drainage through planned throttling of the main drainage.

Please also consider our retention units for parapet drainage and roof drainage!

Strong retention requires strong emergency drainage with height-adjustable weir.

Project-specific calculation and production

The size of the retention openings is calculated on a project-specific basis using a program developed by LORO and confirmed by measurements.

Using state-of-the-art laser technology, the retention opening is cut into the retention pipe and labelled by laser engraving, ensuring the assignment of the retention pipe to the partial roof area.

Advantages of retention

• Rainwater retention on the roof
• Relief of the sewer system
• Rainwater utilisation
• Flat roofs with retention and green roofs
• Accumulation irrigation