Case Study on Masonry Repair and Patching Material – Lithomex

Damaged stone and brick is a common problem for many historic structures around the world. Lithomex is a breathable in-kind repair material for most types of damaged stone and brick. The following is an example of a Lithomex repair on a historic 19th century stone house…

Lithomex Repair in Merion Station, PA:

This house, located in Merion Station Pennsylvania, near Philadelphia, was constructed in the 1920s during the Arts and Crafts style movement. This movement was a direct descendant of the British Arts and Crafts movement which was initiated by William Morris during the mid 1800s as a reaction to the Industrial Revolution and its lack of concern for human lives in the work place. This movement was meant to bring back pride to the true craftsmen once again with an emphasis on hand-made vs. mass production.

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Before applying Lithomex

This house was handcrafted using a variety of stone including Mica Schist, Serpentine, Red Sandstone, Brownstone, PA Bluestone, and some Limestone. It was originally pointed with a high Portland cement content mortar, either 5:1:2 or 1:3 formula of Cement, Lime and sand. Unfortunately this was a recipe for disaster.

During the following 80 years, the softer sandstones received the greatest damage due to the freeze/ thaw cycles of the cold Pennsylvania winters. This combined with later modifications including new windows which were installed improperly allowed water to be trapped behind and within the stone walls. Leaks developed within the house and the homeowners decided it was time to fix things the right way.

BEFORE PHOTOS

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Lithomex being applied

A team from Galli Masonry Restorations took on the challenge to bring this historic home back to its original glory. First they removed all the old pointing and filled in the voids with LimeWorks.us Natural Hydraulic Lime mortar. Then blended with Lithomex colors and textures to replicate the original look of the stone. The damaged serpentine, brownstone and bluestone was repaired and blended in to be virtually unnoticeable.  The color and composition of the final pointing work was chosen by the homeowner which was a mix of Ecologic® Mortar DGM non-pigmented, DGM Grey and black Slag-fleck.

 

 

 

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Back Camera


 

Damaged stone

 

 

 

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Damaged wall at window

 

 

 

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Measuring damaged serpentine stone

 

 

 

 

 

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Lithomex on chimney

 

 

 

 

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Crafting Lithomex

 

 

 

 

AFTER PHOTOS

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Side of house after Lithomex application image 1

 

 

 

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After Lithomex application image 2

 

 

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After Lithomex application image 3

 

 

 

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After Lithomex application image 4

 

 

 

 

 

 

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After Lithomex application image 5

 

 

 

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After Lithomex application image 6

 

 

 

 

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After Lithomex application image 7

 

 

 

All Photos Copyright George Galli, Galli Masonry Restoration

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