BU641 Concrete toppings (2019)

Concrete toppings are often used to overlay concrete floors where the existing surface has deteriorated and needs upgrading or a new function or decorative effect is required for the floor surface. Concrete toppings are durable and water resistant and can be a cost-effective method of floor finishing.

This bulletin provides a design and construction guide for those considering the use of concrete toppings for the first time. It updates and replaces Bulletin 389 of the same name. 

This bulletin covers:

• types of concrete toppings
• problems with concrete toppings
• controlling cracking
• bonded toppings
• unbonded toppings
• construction joints and formwork
• laying the topping
• curing
• protecting the topping
• finish options.