Few jobs protect the long-term health of a home as quietly as repointing. The mortar between your bricks does far more than hold a pretty pattern together. It sheds rainwater, allows moisture to escape and keeps the wall stable. When it deteriorates, problems follow, and knowing what a professional repointing project involves will help you plan sensibly, ask the right questions and avoid unpleasant surprises.
Why repointing becomes necessary
Mortar is designed to be the sacrificial part of a wall. It is softer than the bricks around it, so it weathers first and takes the brunt of frost, wind-driven rain and general ageing. After several decades, most mortar joints begin to crumble, recede or crack. You may notice sandy debris at the foot of the wall, joints that are deeply recessed, or small gaps where you can slide a key into the brickwork.
Left alone, these defects let water penetrate the wall. That can lead to damp patches on internal walls, frost damage to the bricks themselves, and even structural movement in severe cases. Repointing removes the failing mortar and replaces it with fresh material, restoring the weatherproof barrier. It is a maintenance task rather than a rebuild, but it demands skill and patience if it is to last.
The initial survey and quotation
Your first contact with a brickwork specialist will usually be a site visit. A reputable professional will walk around the property, examine the condition of the joints and check the bricks, noting whether any are spalling, cracked or loose. They may press a screwdriver or similar tool into the mortar to gauge how soft or powdery it has become. They will also look at the wider picture, including gutters, downpipes, roof overhangs and ground levels, because leaking rainwater goods are a common reason mortar fails prematurely.
Expect plenty of questions. They may ask how old the property is, whether the walls have been repointed before, and whether you have noticed damp indoors. Following the visit, you should receive a written quotation setting out the extent of the work, the type of mortar proposed, the access arrangements, the estimated timescale and the payment terms. Treat vague, verbal-only estimates with caution. A clear document protects both you and the contractor.
It is perfectly reasonable to ask for examples of previous repointing projects, and to ask how long the specialist has been working with your type of property. Older homes in particular require a different approach from modern brick-built houses.
Choosing the right mortar
This is where a genuine specialist earns their fee. The mortar used for repointing must be compatible with the existing bricks and, ideally, with the original mortar. Many homes built before the early twentieth century were constructed with lime-based mortar, which is relatively soft, flexible and breathable. Using a hard, cement-heavy mix on these walls can trap moisture and force it out through the bricks instead of the joints, causing the brick faces to flake and crumble.
A knowledgeable contractor will often take a small sample of existing mortar to assess its composition. They will consider the sand type, the binder and the colour, and may produce a small test panel for your approval. Matching the colour is important, as mortar can look quite different once it has dried and weathered. Do not be surprised if you are asked to sign off a sample patch before the main work begins. It is a sign of good practice.
Newer houses, built with harder bricks and cement-based mortars, usually need a stronger mix. The key principle is that the new mortar should never be harder than the bricks. A good tradesperson will explain their reasoning in plain language.
Preparation and access
Before any work starts, you can expect a conversation about access. Higher walls will require scaffolding or a tower, which is often the largest single logistical element of the job. Your contractor should explain who arranges it, how long it will remain in place and whether it affects windows, doors or neighbouring properties. If scaffolding crosses a boundary, you may need to speak to your neighbour in advance.
You will also be asked to move garden furniture, plants, vehicles and anything else near the walls. Dust and debris are inevitable, so closing windows on working days is wise. Good specialists will lay protective sheeting, cover delicate planting and keep the work area tidy, but a little forward planning on your part makes everything smoother.
The repointing process itself
Once the site is ready, the work follows a clear sequence. First, the old mortar is raked out of the joints to a depth of roughly twice the joint width, or around twenty-five millimetres in many cases. This may be done by hand with chisels and plugging tools or, on harder mortar, with carefully controlled power tools. Skilled operatives take great care not to damage the brick edges, since a widened joint or chipped arris is permanent and ruins the appearance of the finished wall.
After raking out, the joints are brushed clean and lightly dampened. This step is vital, because dry bricks pull water out of fresh mortar too quickly, weakening the bond. The new mortar is then pressed firmly into the joints in layers, allowing each to firm up before the next goes on. Deep joints are filled in stages to prevent shrinkage and voids.
Finally, the joint is finished to the chosen profile. Common choices include flush, weathered, struck and bucket-handle styles, and the right option depends on the age and style of the building. Weathered and struck joints shed water effectively, while recessed joints are best avoided, as they can trap moisture and be vulnerable to frost. The finishing stage sometimes involves brushing back the surface once the mortar has stiffened, giving a clean, natural texture.
Mess, noise and disruption
Honest contractors will tell you that repointing is not a silent or spotless process. Raking out creates dust and a persistent tapping or grinding noise, and you may find fine particles settling on windowsills and cars. Professionals will use dust extraction where appropriate and clear up at the end of each day, yet some disruption is unavoidable.
If you work from home, have young children or keep pets, mention this at the quotation stage so the team can plan around you. It may be possible to schedule the noisiest tasks for particular times of day.
Timescales and the weather
The duration depends on the size of the wall, the condition of the joints and the number of people working on site. A small area might take a couple of days, while a whole house can easily take several weeks. Be wary of anyone promising an implausibly fast finish. Proper repointing cannot be rushed, because each stage needs adequate time to set.
Weather plays a significant role. Fresh mortar must be protected from heavy rain, strong sun and, above all, frost. Most specialists avoid work when temperatures are close to freezing, and lime mortars in particular need gentle curing conditions. Delays caused by sensible weather decisions are a good sign rather than a cause for concern. Contractors who push on regardless often produce work that fails early.
Aftercare and finishing checks
When the job is complete, take time to walk the walls with your contractor. Look at the joints from different angles and in different light, checking for consistent colour, neat edges and well-compacted mortar with no gaps or smears on the bricks. Minor surface marks can usually be brushed away, but it is far easier to raise concerns while the team is still on site.
Ask about aftercare, too. Fresh mortar may need light misting in warm weather to cure slowly, and you should avoid pressure washing or cleaning the walls aggressively for some time afterwards. You may notice slight colour variations in the first few weeks as the mortar dries, which is entirely normal. A good contractor will explain this in advance and be willing to return should a genuine defect appear.
Understanding the cost
Prices vary according to access, the area to be repointed, the type of mortar and the condition of the wall. Lime repointing is generally more labour-intensive than cement-based work, and intricate brickwork on older homes costs more than simple, flat elevations. Scaffolding often accounts for a significant portion of the total. Obtaining at least two or three written quotations lets you compare like with like, but remember that the cheapest option is rarely the best. Careless repointing can cause more damage than none at all, and redoing poor work is expensive.
Final thoughts
Hiring brickwork specialists for repointing should feel like a collaborative, transparent process. You should receive a thorough survey, a detailed written quotation, a clear explanation of the mortar and method, and sensible communication from start to finish. If a contractor cannot explain why they have chosen a particular mix, or dismisses your questions, it is worth looking elsewhere.
Done well, repointing renews the weather resistance of your walls, protects the bricks, improves the appearance of your home and can last for decades. Treat it as an investment in the fabric of your property, take the time to find skilled people, and you will reap the benefits long after the scaffolding comes down.