Glass block stains

Causes

Alkaline run-off from cement mortar such as an external wall or where the glass block wall is part of a shower

Listed under: Interior, fixtures and fittings, glass, glass blocks, masonry, stains, walls, showers, mortar

Cause

Alkaline run-off from cement mortar such as an external wall or where the glass block wall is part of a shower

Repair

  • wash and dry glass blocks regularly – at least weekly in the shower; the problem will continue until water soluble alkaline salts have leached out of the mortar

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