Concrete Ballast Block 17kgs

This is a solid, dense 7.3N concrete block measuring 440 x 215 x 100mm and weighing approximately 17kg, used as ballast weight in non-penetrating flat roof solar mounting systems. Made from secondary and recycled concrete materials with a natural grey finish, it is designed to be loaded into or stacked within a mounting system's ballast trays or frames to resist wind uplift without fixing through the roof membrane. Its rectangular block shape allows it to sit flush and stack predictably alongside other blocks, so an installer can build up the total ballast weight an array design calls for. This block is a standard builders'-merchant dense concrete unit rather than a solar-specific product, and is supplied for this purpose by Travis Perkins.