Case 2
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![f_stn2](http://maintainability.com.sg/wp-content/uploads/2016/06/f_stn2.jpg)
Introduction
Staining due to reinforcements
Type of Building: Public
Rust marks forming on the external façade of rendered walls that is not easily removed by cleaning. Although not a structural defect, it is a failure in the aesthetic performance of the façade. Wind driven rain has seeped in to wash out the rust and causes stain marks.