Renaissance Lime Putty

Lime kiln schematics

We are committed to supplying superior quality lime putty produced EXCLUSIVELY for masonry restoration, green building and the decorative industry. Our Traditional lime Putty is produced in Italy from 5 to 8 in. lumps of high purity calcitic limestone (CaO >98%) - (MgO <0.10%). They are fired at low temperatures (<1000° C.) in indirect flame, natural draft, continious production vertical kilns fueled by wood waste from an adjoining lumber mill. Then they are immediately slaked and kept in open air pits to age, fully respecting the traditional "Roman" production methods. 

This meticulous process results in a fatty lime ideal for historic restoration work, fresco, stucco, plaster,  lime paints and fine finishes such as Stucco, Tonachino, Venetian plaster, sgraffiato, scagliola, Tadelakt.

lime burning kilns

Our lime putty is ANAB, ICEA certified in the EU (equivalent to: L.E.E.D. - U.S. green building council) as it does not contain any additives, polymers or additions of any kind.

It has been utilized for many prominent restoration projects and green building in Europe.

lime putty aging vats

Traditional Lime Putty, also known as Slaked lime, mixed with aggregates and pozzolans has been the base for producing lime mortar and "Roman concrete" for millennia and has stood the ultimate test of time.  

The simple facts are that the original lime mortar and "Roman concrete" which structures were built with thousands of years ago still remains remarkably strong and uncompromised. Portland based cements have since gained wide use as a modern "improvement", and unfortunately the traditional use of slaked lime putty and its production has nearly been abandoned. These new products recently have been found, by a growing number of scientists and practitioners, to fall short compared to traditional and ancient cements.

Environmental and health concerns have also come to the forefront in the construction industry. Portland cement production accounts for a much higher carbon footprint than in slaked lime production. Lime mortar re-absorb most of the carbon dioxide created through production, while curing. This results in an 80% carbon footprint reduction compared to Portland cement. 

Roman lime kiln design

Portland based cement used in historic restoration applications are also the cause of accelerated and irreversible damage to historic structures due to their higher compressive strength and the inclusion of gypsum and harmful salts and toxics.

Portland cement's limited lifetime durability in new construction, poor adaptability and detrimental properties in restoration applications (presence of sulfites, toxics, radioactive particles) have spiked renewed interest in lime binders and the necessity to rediscover the traditional production methods and use of lime binders in restoration and green building construction.

Traditional lime kiln

The virtues of slaked lime are many and the versatility of uses unparalleled. The same lime putty can be utilized to formulate mixes for: limecrete, lime mortar, renders, stucco, highly decorative finishes like Tonachino, Sgraffiato, Scagliola, Marmorino, Stucco Veneziano, Cocciopesto, Tadelakt, Affresco, lime wash, lime paint, and more. 

Lime based finishes are hypoallergenic, antimicrobal, antibacterial, antifungal, non toxic and furthermore allow the building to "breath" regulating the moisture levels in the air within a building and improving the health of its residents.  Lime mortar can also provide for insulating values, expecially when used in combination with aggregates with insulating properties such as expanded clay and shale , pumice, grog and other specialty aggregates.

With slaked lime, aggregates and pozzolans you can recreate traditional applications unmatched by modern counterparts in resiliance and beauty, with ecologic and health benefits for the craftsman, the client and the environment. 

We personally use Our Lime putty, Aggregates, Pozzolans and line of tools on a daily basis at our own masonry restoration service company: Florentine Renaissance Masonry so we are confident that you will be satisfied. (If we don't like it, we won't sell it!) 

lime putty production facility

© fabio bardini 2012