Blistering can quickly lead to paint flaking and peeling due to the formation of bubbles in the exterior of paint film, resulting from a loss of adhesion followed by the lifting of the existing paint film from the surface underneath it.
Concrete cancer is caused when the steel reinforcing within a concrete slab begins to rust. As the steel rusts it expands, displacing the concrete around it until it becomes brittle and starts to crack.
Cracked walls are often both figuratively and literally just the surface of a bigger problem within a wall. Time, movement, and moisture can all be to blame for cracks forming in render - however it is important to determine the extent of the damage and the root cause before taking action.
Control joints are necessary to allow for the natural expansion and contraction that occurs in concrete from temperature changes. Without these joints, cracks can travel across your wall, creating costly damage. The good news is that when the joints do crack, they’re still doing their job of protecting the concrete slabs that they surround. However, it’s important to ensure that control joints are repaired otherwise they may fail in the long term and cause lasting damage to the concrete.