Stone restoration and stone conservation is a very skilled operation of which we have vast experience. If a stone only has surface erosion, short of replacing the stone piece in question we repair it with a lime based, colour matched repair system called lithomex. This type of repair for relatively minor erosion etc., is in line with current thinking of Historical Scotland and Edinburgh Council etc.
Normally carried out on softer sandstone, we first remove with teethed chisels all the soft decayed stone to leave sound stone exposed. Depending on the depth of eroded stone which can be 2” or more, we may elect to fix stainless steel screws/dowels into the affected area to give the Lithomex a better grip.
After the Lithomex has been built up in 2 or more layers to the desired profile, it is left to cure for 24 -48 hours, and then sanded down to a perfect finish.
Our very switched on suppliers of Lithomex in Edinburgh have large colour charts with which we match a sample of the stone from the building we propose to repair, thus insuring the very best stone colour match. If required, we can then dirty down new repairs to make them even less conspicuous.
Stone Restoration Lithomex is formulated so that when dry it breathes and flexes at the same rate as the natural stone and does not trap moisture behind it, as cement based repairs do. One cannot compare the results achievable with Lithomex to what can be done with cement.
All the stone repairs you see in these example photos were carried out using Lithomex Stone Repair compound.
You can read more about Lithomex here: