Priming

A primer coat serves as the critical link between the roof substrate and the protective coating system. On a porous surface such as concrete tiles, the primer penetrates into the surface pores and forms a stable base layer that prevents the subsequent membrane coats from being absorbed unevenly. On non-porous surfaces such as previously painted metal or glazed tiles, specialised adhesion primers create a chemical or mechanical bond that allows the top coats to grip firmly to the surface. Different roof substrates require different primer products. Dulux Acratex, for example, offers specific primers for cement tiles, terracotta tiles, and metal roofs. Using the incorrect primer for the substrate type is one of the most common causes of coating failure — the top coats may appear fine initially but can begin peeling or flaking within months if the wrong primer was used or if the primer was omitted entirely. In Gippsland, Town & Country Roofing uses Dulux Acratex primer-sealers as a standard part of every roof restoration. The primer is applied after the roof has been high-pressure cleaned and all repairs, re-bedding, and re-pointing have been completed. A full day is typically allowed for the primer to dry and cure before the first membrane coat is applied, ensuring the best possible adhesion and long-term durability.