What is falsework or formwork primarily used for in concrete buildings?

Falsework or formwork is primarily utilized to support poured concrete during the curing process. When concrete is poured into forms, it is in a liquid state and requires adequate support until it hardens and gains sufficient strength. This support is crucial because freshly poured concrete can be heavy and may collapse or deform without proper containment. Once the concrete has cured and developed the necessary strength, the formwork can be removed, allowing for the final structure to stand independently.

The other options do not accurately describe the primary function of falsework or formwork. Supporting walls, while an important aspect of overall building construction, is not the specific role of formwork. Waterproofing is a separate concern that involves preventing water intrusion and is not related to the function of holding concrete in place. Similarly, insulation is a different component of construction that deals with thermal performance rather than the structural support needed during the curing phase of concrete work.