The Common Cause

A very common problem with stone steps, especially on buildings dating from 100-200 years old and onwards, is improper use of the wrong material and modern solutions such as cement mortars and coating the masonry in non-breathable sealants. These buildings are constructed from natural breathable materials such as stone, brick, and timber. From the 1950’s the use of cementitious mortar became the norm causing a step away from more traditional materials, specifically the use of Lime mortar. Overtime, as is the norm with traditional build buildings with natural materials, there is movement and flexibility over the course of 100-200 years and onward, adding to the advantage pf using Lime mortar as it is a breathable material. But with cement this is not the case and with stone being naturally porous, moisture can be trapped causing damp and wet rot, resulting in major structural damage over time. This is where we come in.

The Process

When it comes to stone step repair, the process begins with raking out and removing all the old cementitious mortar to expose the inner bed joints. Then, after brushing back and cleaning the masonry joints, we wash and clean the steps in preparation for the lime mortar. The great advantage of lime is its breathability, flexibility, and its natural material. Pointing styles can vary from flush and brush, recessed to struck pointing depending on the client’s preference.