The popularity of the Predalles Slabs is largely owing to the ease with which they may be fitted to masonry construction, framed concrete and steel structures alike, as well as the fact that they can be geometrically shaped to any structural plan. Moreover, the slab may be constructed without the need for formwork and scaffolding and enables fast and easy erection. Roughened top concrete and trellises ensure bonding with the cast in-situ topping concrete. The smooth underside surface negates the need for plastering and enables painting to proceed immediately.