Fassa Base Coats for Lightweight Block / High Suction Backgrounds

Preparing lightweight blockwork for rendering requires attention to the block’s absorbency, strength and surface condition. High-suction backgrounds can draw moisture from freshly applied materials, so the preparation and base coat should be selected to suit both the block and the intended decorative finish.

For a Fassa Bortolo render specification, confirm the block manufacturer and type before choosing a primer, undercoat or reinforcement mesh. These materials perform different roles and should follow the recommended system build-up. Contact Rendit with your substrate details and proposed finish for help identifying the appropriate products for your project.