Fassa Base Coats for Medium Density Block

Shop Fassa Bortolo base coats recommended for medium-density blockwork, including Fassa KI7, KC1 and KD2. Fassa KI7 is a fibre-reinforced lime and cement base coat with water-repellent properties, suitable for internal and external applications.

A base coat is not always required before applying a Fassa Bortolo scraped-texture render to medium-density blockwork. However, some applicators prefer to use one to improve workability, create a more consistent background and allow the finishing render to be applied in thinner layers.

Choosing a Fassa base coat

The products in this category have different formulations and roles. KC1 is a lime-and-cement mortar with additives to improve workability and adhesion. KD2 incorporates fibre reinforcement, while KI7 combines fibres with water-repellent properties. Select the base coat according to the blockwork and the requirements of the proposed Fassa Bortolo finish.

Preparing medium-density blockwork

Block density is only one consideration when planning a render specification. Surface texture, suction, mortar joints and changes in background also influence the preparation required. Identify any uneven areas or junctions between different materials before work begins, and confirm where reinforcement mesh is needed.

Follow the specified coat thicknesses and curing periods for the selected products. Where a base coat is used beneath a scraped-texture finish, it should form part of an approved build-up rather than simply being added to reduce the finishing coat’s thickness.