Case 1

Introduction

Type of Building: Carpark

This case presents crazing of the paint coating on the basement wall. Crazing is characterized by irregular and hexagonal fine cracks typically between 6 and 75mm across over a contiguous area. It is also referred to as map or web cracking. It is usually the result of excessive drying of the plaster. This weakens the paint and cause crazing. Poor surface curing and too wet mix bleed water when toweling, may be possible causes for excessive drying of the plaster surface after construction.

Crazing of paint cause either by the plaster behind the paint or by the paint itself may appear in the following forms:

There are similar cases where crazing of the paint is related to water seepage. For more information on paint crazing due to moisture, please refer to Paint Blistering, Peeling & Flaking.

Whether it is crazing or blistering, is not dealt with promptly, peeling and eventual flaking are most likely to follow.