BRE GR5 PDF

Introduction

Even in a ‘dry' building, there is a surprising amount of water in porous materials, most of which does no harm. A building is only considered to be damp if the moisture becomes visible through discoloration and staining of finishes, or causes mould growth, sulfate attack, frost damage or even drips and puddles. All these signs can lead to deterioration in decorations and the fabric of the building. Damp problems are generally referred to as being of internal or external origin.