Roundtower Blog

A Complete Guide to Lime Mortar

Roundtower's guide to Lime Mortar. Covering the usage, types of lime, sand selection & water.

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Lime Pointing

This is the process where new mortar is inserted into prepared joints between brick or masonry.

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Pozzolans & Additives

The word pozzolanic is derived from the word Pozzuoli. This is the name of an area on the Italian coast near Vesuvius.

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Guide to mixing and storage of non-hydraulic lime mortar

Today, non-hydraulic lime mortars are mixed from high calcium non-hydraulic lime putty and aggregates.

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Guide to mixing natural hydraulic lime mortar

A comprehensive guide to mixing natural hydrualic lime mortar.

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Limewash

Limewash (or other breathable paint finish) is the final part of the protective envelope for structures coated with a lime render either smooth or rough as in the case of harling.

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Lime Protection, Curing and Aftercare

Lime Protection, Curing and Aftercare is a vital process in the successful use of lime mortars.

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Lime Harling

Harling is a Scottish name for what is often called wet dash or roughcast. This is probably the most traditional finish that is still common today. 

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Raking Out and Pre Pointing Operations

The purpose of this operation is to remove either old and deteriorated pointing/bedding mortar or modern cementious mortars that are causing damage to the building fabric.

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Limecrete

The use of limecrete is desirable in a historic building as it allows naturally occurring moisture to escape through the floor. The use of modern cement floors has caused some problems as moisture is unable to escape through the floor......

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Why Lime?

For the past 150 years modern artificial cements have slowly been replacing traditional lime based mortars and plasters, to such a degree that now virtually all construction is carried out using only modern materials. Whilst many of these materials are perfectly suitable for modern buildings they have been found to be incompatible with the construction of old buildings.

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SupaSoft Insulation made from Recycled Plastic Bottles

About 8 million tonnes of plastic enter the oceans each year. SupaSoft Insulation is helping to reduce this number by reclycling plastic bottles and turning the plastic into high performing Insulation. 

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The Restoration of Cor Castle

Cor Castle and the surrounding land has been in my family since the 18th Century. The building was passed down the generations to my grandparents who were living there when it was destroyed by fire in 1921...

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