Case 1
- Introduction
- Causes of Defects
- Good Practices
- Standards
- Maintenance and Diagnostics
- Remedial
- Similar Cases
- References
Introduction
Type of Building: Public
Paint blistering, peeling and flaking in a basement is often associated with moisture. For paint flaking and peeling associated with material and other issues, please check out similar topic under:
Basement > Architectural > Paint Defect
Paint flaking and peeling associated with moisture in a basement may appear in different forms:
Blisters are found around the PVC floor trap in this case. Blistering is the formation of bubbles resulting from localized loss of adhesion and lifting of the paint film from the underlying surface.
Blistering can be a result of moisture, poor surface preparation such as failure to remove chalk residue, hard primer or application of paint film on worn surfaces [1-4]. Bubbles result from localized loss of adhesion and lifting of the paint film from the underlying surface.
Provision of waterproofing at the penetrations is crucial to control the water seepage through the concrete slab. Via capillary action, the water would travel through the concrete if it is porous and to the paint film when the waterproofing membrane is not effective.