M. O. Obande

Blocklaying and concreting are two fundamental construction techniques used to build strong walls and foundations in buildings. Blocklaying involves arranging concrete blocks in horizontal courses using mortar as the binding agent. The blocks must be laid level and plumb to ensure structural integrity. Concreting, on the other hand, is the process of mixing cement, sand, gravel, and water to create concrete, which is then poured into formwork to set and harden.

When building a typical residential house in Lagos, a mason must first lay concrete blocks for the walls while simultaneously preparing concrete for the foundation and ground beam. Poor blocklaying can lead to weak walls that crack easily, while improper concreting results in weak foundations that cannot support the building's weight.

Both processes require skilled workers, proper tools, and quality materials to achieve durability and safety.