← Industrial rooftops
Ballasted or anchored
Two ways to hold a flat-roof system against the wind. The structural assessment decides which is right for your building.
What it is
A ballasted system is held in place purely by weight, usually concrete blocks or gravel in trays. The roof membrane is not penetrated, so there is no risk of leaks. The price is additional load on the roof structure.
An anchored system is fixed to the roof structure with certified anchors. It adds little weight but requires penetrations that must be sealed permanently. On many roofs a combination of both is the best answer.
Suitable for
- Ballasted: roofs with load reserves and sensitive membranes
- Anchored: lightweight roofs with limited load reserves
- Roofs in high-wind locations
Advantages
- Ballasted: no penetration, no warranty issues with the roofer
- Anchored: minimal weight
- Both: proven, certified systems
What we check in planning
- Structural survey of the roof structure
- Wind load zones on the roof
- Coordination with the roofing contractor's warranty
Not sure which option fits?
Send us your site or roof details. We compare the options and recommend the best one.