Content written by Mick the Builder
Footing systems
Footing systems
Reinforcement Minimum Cover Requirements
Reinforcement needs to have sufficient concrete around it to prevent moisture, causing it to rust the measurement of amount of concrete around the reinforcement is knowing as cover. if the reinforcement rust it can cause the concrete to spall and lose it strength . This is known as concrete cancer.
When concrete is exposed to
the minimum cover required is ...
Unprotected ground
Internal surfaces
External exposed surfaces
A membrane in contact with the ground
40mm
40mm
30mm
20mm at
"In any case you have cut the concrete and rio is exposed you will need to paint on a epoxy or rust proof paint to prevent rust."