Lime Mortar, Meaning, Properties, and Use
Understanding Lime Mortar
Lime mortar is a traditional mortar made using lime as the primary binder instead of cement. It has been used in brick and stone construction for centuries and is valued for its flexibility, breathability, and compatibility with historic masonry.
Unlike cement based mortars, lime mortar allows moisture to pass through the joints, helping buildings manage damp naturally and reducing the risk of trapped moisture.
Purpose of Lime Mortar
The main purpose of lime mortar is to provide a flexible and breathable joint that protects brickwork while accommodating movement. It is designed to be softer than the bricks themselves, allowing the mortar to take movement and weathering rather than the masonry.
Key reasons lime mortar is used include:
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Allowing moisture to escape from the wall.
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Reducing the risk of cracking and damage to bricks.
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Accommodating natural movement in older buildings.
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Maintaining traditional construction methods.
Lime mortar plays a critical role in the long term health of historic brickwork.
Lime Mortar in Traditional Brickwork
In traditional brick construction, lime mortar was the standard material before the widespread use of cement. It is commonly found in period properties and listed buildings, where maintaining breathability and flexibility is essential.
Using cement mortar on older brickwork can lead to damage, making lime mortar the preferred choice for repairs and restoration.
Lime Mortar with Brick Slips
Lime mortar can also be used with brick slips, particularly where a traditional appearance or breathable system is required. It is often chosen for internal feature walls or heritage style installations where flexibility and appearance are prioritised.
Careful selection is important, as lime mortar sets more slowly than cement based alternatives and requires appropriate curing conditions.
Lime Mortar and Slips from Stock
At Slips from Stock, our brick slips can be paired with lime mortar for projects that require a traditional finish or breathable jointing solution. When applied correctly, lime mortar enhances the authenticity and character of brick slip installations.
Lime mortar is a time proven material that continues to play an important role in brickwork. Whether used with full bricks or brick slips, it offers flexibility, breathability, and a traditional aesthetic that modern materials cannot always replicate.