InstallationUp to date · Jan 15, 2026
Ballasted Mount
A solar racking system that uses heavy blocks (concrete or steel) to hold panels in place without penetrating the roof. Common on flat commercial roofs and some residential flat roofs.
Why It Matters
If your roof cannot be penetrated (e.g. membrane roofs, lease restrictions), ballasted mounting is an alternative. It requires the roof to support the additional weight.
Related Terms
Racking
The mounting hardware (rails, clamps, flashings, and brackets) that secures solar panels to a roof or ground structure. Key types: rail-mounted, rail-less, and ballasted (flat roof).
Roof Penetration
A hole drilled through the roof to attach solar panel mounting hardware. Properly flashed penetrations use waterproof sealant and metal flashing to prevent leaks for the life of the system.