Roofs and terraces

The problem of time

On an occupied terrace the critical variable is not the cost of the material but how long the disruption lasts. A traditional cycle with a double bituminous membrane means demolition, disposal, screed, laying and new paving: weeks.

Fast-reactive cementitious liquid systems were made for this: applied by trowel or roller, they are ready for rain, foot traffic and recoating in about three hours, even in unfavourable weather, and they adhere to damp substrates without a primer.

Where it actually fails

On terraces the flat surface is rarely the weak point. Leaks come from the junctions: the perimeter against the wall, the door threshold, the drains, the expansion joints, the eaves. Any serious system is judged by the junction details it provides — tapes, pre-formed corners, downpipe sleeves — not by the product spread over the field.

Under tile or exposed

Composite waterproofing under tile is the standard solution for terraces, balconies and wet rooms: the waterproof coating sits under the adhesive, the tile protects it. Where tile is not needed, an elastic, UV-resistant exposed system further reduces thicknesses.