Projects completed by Sleight Conservation
The Stone House, Thornby, Northamptonshire.
This house is constructed from Northamptonshire stone which is quite a soft stone that can erode when in an exposed, aggressive environment.

The areas of the house that were conserved were in and around the ground floor front windows.
Stones used as lintels and window jambs had delaminated due to water ingress below the first floor and ground floor windows. Mortar joints had been washed from between the stones, creating deep voids behind the facing stones.
These deep voids were grouted using a lime based grout. Stones that were delaminating were pinned with 3mm copper dowels and then grouted with lime mortar. Epoxy resins were not used as these can create a barrier to moisture movement.

The narrow joints have been carefully re-pointed with a lime putty mortar 		The mortar joints were quite thin, less than 5mm in places. So re-pointing had to be accurate and a lime rich mortar was used to fill joints that were 200mm deep in places. It was imperative that the joints were filled from the back to face so as to prevent any water movement within the wall
Any repairs to stones were finished using a matching stone coloured mortar