Specialist lime mortar repointing - Oxfordshire.
History teaches us that, traditionally, quicklime was slaked on site in the production of lime mortar. It has always been understood that good mortar was mixed to a ratio of 1:3. That's one part lime, three parts sand. We know this because in historic records,1:3 mixes were specified by architects and master builders.
However, the aforementioned quicklime mix meant that the lime content doubled through slaking and it's taken this long for us to understand - through mortar analysis - that using a 1:3 mix nowadays falls way short of what the craftsmen of yesteryear intended.
The ways of preparing mortar, passed down from father to son hundreds of years ago, have today been interpreted incorrectly and it now means that the current approach to combining 1:3 lime and sand on site can lead to failure.
This realisation has only been made possible by deconstructing old mortars to reveal that most were made in a way which meant there was a far higher lime content than we ever imagined.
Through many years of practise, in combination with the study of academic research, I can at last bring true historic artisanship to period property as the lime, and the lime mortar, I use is exactly the same as it was when stone and brick built properties were originally constructed.
My focus is primarily on exclusively built properties in prime locations where I can provide top quality to owners who are looking for superior workmanship. My customers have usually concluded that to do a good job sympathetically takes time and are unwilling to settle for anything other than the absolute best.
For beautifully textured natural stone and brickwork to retain its lasting appearance it needs a quality natural mortar to keep nature at bay.
I specialise in the restoration of high-end stone and antique brick properties
To see how I get the best results go to:
Choosing someone who fails to understand the mechanics and science of older properties can have disastrous results as specialist skills and materials such as natural hydraulic lime are required on historic buildings. Lime will resist water penetration whilst remaining porous and flexible and it will also wick away moisture from a building ensuring it remains weatherproof, watertight and dry.
In direct contrast, Ordinary Portland Cement is neither flexible nor porous and traps moisture in a wall. The result of imprisoned moisture is rising damp and rotten stone.
In the case of repointing, newly mortared joints often need to be brush finished and not trowel finished. This technique makes the grains uniform and creates a protective coat which weatherproofs the mortar until completely hard which takes about a year.
A top-end result cannot be achieved without the appropriate tools. I have many of these specially made and my array includes hand-cast axes with which to dress stone in addition to specifically adapted trowels which facilitate work on non-standard joints.
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