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The Stonemason’s Gospel According to Ian Cramb

Lime Explained by Andrew deGruchy (pg. 143) Limestone, the material calcium carbonate, has never changed from its beginning up to and including now. There have always been two classifications, ‘pure’ and ‘impure.’ Today it is classified as pure (high calcium) and two levels of impure lime based on the magnesium content, Dolomitic and Magnesian. What […]

Types of Masonry Binders

lime-and-cement-cycle by  Jessica (Focht) Aquiline, MSHP, LimeWorks.us Conservation Specialist Binders are materials that act as a bonding agent that when mixed with aggregate and water form mortar, which is used to bond various masonry units together playing a structural and decorative role in a building. There are four main binders that have been used throughout masonry […]

Learning to Use Lithomex

Recently some of the employees of LimeWorks.us had the opportunity to learn more about our product Lithomex from Douglas Johnston, of Mason’s Mortar, Scotland. Lithomex is a natural hydraulic lime based stone and brick patching material that comes in a variety of colors and can be textured to replicate any existing stone. The training course […]

St. Astier Natural Hydraulic Lime for Historic Restoration, Conservation and New Build Projects

Prior to the 1940’s many brick and stone buildings were constructed with lime and sand for mortar. Many times these limes were inadvertently hydraulic limes. The lime putty used may have had a hydraulic set because of impurities in the limestone when a limestone contained various degrees of reactive silica and was burned along with […]

Lime as a Green Build Material

Here’s How St. Astier Natural Hydraulic Lime (NHL) Plays An Important Role In Construction As A Green Build Material. St. Astier is a 100% natural product and does not contain any additives. It is one of the greenest materials used in construction. This is due to its purity, its calcium carbonate composition, its longevity and […]

Restoring St. Patrick’s Cathedral

An Undertaking of Passion and Love LimeWorks.us is a big part of helping to restore a prominent landmark in New York City, St. Patrick’s Cathedral. The Cathedral was completed in 1878. Then in 1888 spires were added. The picture below is taken from near the top of one of one of the spires. The Cathedral […]

Another Successful Straw Bale Building with Natural Hydraulic Lime Plaster – Little Rock Arkansas

Straw bale construction is the best of both worlds, it is a green and sustainable way of building and can be affordable with low maintenance and amazing insulation that will help keep energy prices low. Natural Hydraulic Lime is crucial for success when building with straw bales. Two factors that make Natural Hydraulic Lime so […]

Limelight on the Restoration of the Rotunda at the University of Virginia

The University of Virginia is the only US university with a World Heritage designation, it’s conservation is of the utmost importance and is currently undergoing the largest restoration campaign in decades. Matt Wolf and his team from Centennial Preservation are currently working on the repointing and window repairs for the Rotunda at Thomas Jefferson’s Academical […]

Chemistry of Lime Mortar – Neighborhood Preservation in Philadelphia

The Chemical Heritage Foundation released an episode of their award winning podcast Distillations.  In this episode, Randy Ruth, formerly of LimeWorks.us, discusses the chemistry behind lime mortar, historic masonry buildings and the ongoing efforts to preserve one of the finest works of notable Philadelphia architect, Frank Furness. The 19th Street Baptist Church located in South Philadelphia […]