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Construction for Landscape Architecture by Jamie Liversedge, Robert Holden

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Problems with brickwork

The commonest problems with brickwork are to do with the soluble salts in the brick, which are washed out by water penetration. Hence, correct detailing of joints, copings, and moisture-proof courses is vital in order to minimize water penetration. It is also imperative to ensure that bricks are not soaked on site before being laid (and that overflow pipes are not left dripping). Engineering bricks should be used in the lower courses close to the ground; walls should be detailed to cast off water; and brickwork should not be pointed so that mortar is raised beyond the surface of a wall, which will ensure that water is retained and lead to "spalling"—the faces of the bricks flaking off.

Magnesium and sodium salts leave ...

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