Stucco – sealant cracking at movement control joint
Listed under: Exterior, adhesives and sealants, sealants, plaster and fibrous plaster, stucco, cladding, walls, moisture, leaks, wall cladding, stucco wall cladding
Cause
UV exposure
Repair
- fully remove all sealant from the joint, insert a backing rod or bond breaker tape and apply and tool off new sealant suitable for the in-use environment
- obtain advice on the correct sealant for the material and joint size
- use a paintable sealant if the wall is to be painted.
- where it is suspected that the building may be leaking and there is a risk of damage behind the cladding, engage an experienced building surveyor to report on the building
Cause
Sealant not suitable for being painted
Repair
- fully remove all sealant from the joint, insert a backing rod or bond breaker tape and apply and tool off new sealant suitable for the in-use environment
- obtain advice on the correct sealant for the material and joint size
- use a paintable sealant if the wall is to be painted.
- where it is suspected that the building may be leaking and there is a risk of damage behind the cladding, engage an experienced building surveyor to report on the building
Cause
Too much movement for the grade of sealant
Repair
- fully remove all sealant from the joint, insert a backing rod or bond breaker tape and apply and tool off new sealant suitable for the in-use environment
- obtain advice on the correct sealant for the material and joint size
- use a paintable sealant if the wall is to be painted.
- where it is suspected that the building may be leaking and there is a risk of damage behind the cladding, engage an experienced building surveyor to report on the building
Cause
Sealant not installed over a backing rod or bond breaker tape
Repair
- fully remove all sealant from the joint, insert a backing rod or bond breaker tape and apply and tool off new sealant suitable for the in-use environment
- obtain advice on the correct sealant for the material and joint size
- use a paintable sealant if the wall is to be painted.
- where it is suspected that the building may be leaking and there is a risk of damage behind the cladding, engage an experienced building surveyor to report on the building
Cause
Sealant at the end of its serviceable life
Repair
- fully remove all sealant from the joint, insert a backing rod or bond breaker tape and apply and tool off new sealant suitable for the in-use environment
- obtain advice on the correct sealant for the material and joint size
- use a paintable sealant if the wall is to be painted.
- where it is suspected that the building may be leaking and there is a risk of damage behind the cladding, engage an experienced building surveyor to report on the building