A plinth is the lowest, often slightly protruding section of a facade or wall, forming the transition between the foundation and the rest of the wall. The plinth protects the masonry from splashing rainwater, ground moisture and mechanical damage. On houses, the plinth is usually 30-60 cm high and sometimes finished in a different material or colour than the rest of the facade.
The two measurements that matter most when working on a plinth.
Plinth vs. skirting board
Term
Location
Function
Plinth
Exterior facade
Protects bottom of facade from moisture/impacts
Skirting board
Interior wall, floor edge
Covers the floor-wall gap
Types of plinths
Type
Material
Features
Brick plinth
Different brick type/colour
Classic, visible contrast with facade
Concrete plinth
Cast or precast concrete
Strong, smooth, common in commercial buildings
Natural stone plinth
Bluestone, granite
Durable, stately, expensive
Rendered plinth
Masonry + waterproof render
Sleek appearance
Coated plinth
Masonry + water-repellent coating
Invisible, good protection
Maintaining and protecting a plinth The four work steps for refurbishing a plinth, in order.
Refurbishing an existing plinth
1. Remove loose paint/render — Scrape and brush
2. Repair joints — Remove damaged mortar and repoint
