Case 1

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Facade_PaintedWall_Alligatoring_Case-1

Introduction

Type of Building: Public residential flats

A form of paint failure in which large cracks form on the surface layer, the edges of the fissures showing good adhesion. The cracks may become so large that the paint film becomes a series of separated islands.

Alligatoring is usually caused by the natural aging of oil-based paint due to temperature changes. The repeated expansion and contraction can cause the paint to lose its elasticity. This issue can also arise from applying a hard, rigid coating, such as oil enamel, over a softer, more flexible one. Other causes include applying a topcoat before the primer or basecoat has dried and applying a coating over a glossy finish.