A stone wall in France with lime mortar grouting being applied. Right: unapplied. Centre: lime mortar applied with a trowel. Left: lime mortar applied and then beaten back and brushed with a churn brush.
Despite its enduring utility over many centuries, lime mortar's effectiveness as a building material has not been well understood; time-honoured practices were based on tradition, folklore and trade knowledge, vindicated by the vast number of old buildings that remain standing. Only during the last few decades has empirical testing provided a scientific understanding of its remarkable durability....the soft and porous properties of lime mortar provide certain advantages when working with softer building materials such as natural stone and terracotta.
Despite its enduring utility over many centuries, lime mortar's effectiveness as a building material has not been well understood; time-honoured practices were based on tradition, folklore and trade knowledge, vindicated by the vast number of old buildings that remain standing. Only during the last few decades has empirical testing provided a scientific understanding of its remarkable durability.
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