Why Repointing Matters
Stonework is built to last for generations. It gives a building strength, character, and timeless appeal. However, like everything exposed to the elements, it naturally ages over time. Years of rain, frost, wind, and temperature changes gradually wear down not only the stone itself, but also the mortar that binds it together.
As mortar begins to deteriorate, small cracks and gaps can appear. At first, these may seem minor and easy to overlook. But over time, weathering can worsen, slowly opening up holes in the joints. When this happens, moisture can penetrate the structure, and the stone may begin to loosen. Left untreated, what starts as minor erosion can develop into far more serious and costly problems, such as water ingress, damp issues, internal damage, and even structural instability.
Big Ideas,
Real Impact.
Repointing addresses this slow but inevitable process. By removing weakened or crumbling mortar and replacing it with fresh, durable material, the integrity of the structure is restored. This not only strengthens the masonry but also improves weather resistance and helps preserve the appearance of the building.
Catching deterioration early is key. Acting before significant damage occurs can prevent expensive repairs in the future and extend the lifespan of the stonework for many years to come.
Depending on the extent of the damage, this can be resolved either by carefully repairing affected sections or by carrying out a full repoint to ensure long-term protection and structural stability.
The Right Mortar Makes the Difference
Why Using the Right Mortar Matters
Choosing the correct mortar for pointing is just as important as the workmanship itself. Mortar is not simply a filler between stones or bricks — it plays a vital role in how a building performs, breathes, and ages over time. .
Movement and Flexibility
All buildings move slightly due to temperature changes, settlement, and general environmental factors. Lime mortars are more flexible and can accommodate this natural movement. Strong cement mortars, by contrast, are far less forgiving and can crack under stress, allowing water to penetrate.
Longevity and Appearance
Using the correct mortar also ensures a sympathetic appearance. The colour, texture, and finish should complement the existing masonry. An inappropriate mix can stand out visually and detract from the character of the building — particularly in period or heritage properties.
The Building Must Be Able to Breathe
Traditional stone and brick buildings were designed to manage moisture naturally. The mortar joints allow trapped moisture to evaporate, helping the structure “breathe.” If an overly hard or impermeable mortar — such as a strong cement mix — is used in place of a more suitable lime-based mortar, it can trap moisture within the wall.
When moisture cannot escape, it often leads to damp problems, internal damage, and accelerated deterioration of the masonry.
Mortar Should Be Softer Than the Stone
A key principle in pointing is that the mortar should be softer and more flexible than the surrounding stone or brick. Mortar is designed to act as the sacrificial element of the wall — meaning it should weather and erode before the masonry units do.
If a mortar is too strong or rigid, it can force movement and stress into the stone itself. Over time, this may cause cracking, spalling, or irreversible damage to the masonry — repairs that are far more costly than repointing.
Long-Term Protection
Ultimately, repointing is about preserving the building for the future. Using the right mortar ensures the structure remains durable, weather-resistant, and structurally sound. Cutting corners with unsuitable materials may save money initially, but it often leads to more extensive and expensive repairs later on.
When it comes to pointing, the right mortar doesn’t just protect the joints — it protects the entire building.
