How Long Does Repointing Last?

Repointing is one of those jobs that homeowners don't think about until there's a problem — and by then, the mortar has often been failing for years. One of the most common questions I get asked once the work is done is: "How long will this last?" It's a fair question, and the honest answer is: it depends. But done properly, with the right mortar for your property, repointing should last a very long time. Here's what affects the lifespan and what you can do to get the most out of it. ## What's a Realistic Lifespan for Repointing? As a general guide: - **Lime mortar repointing**, done correctly on a suitable property, can last **50 to 100 years** — sometimes longer. Many Victorian properties still have their original lime mortar in good condition. - **Cement mortar repointing** typically lasts **20 to 30 years** before it starts to crack, shrink, or fail — and on older brickwork, it can cause damage well before that point. These are broad figures. The actual lifespan of any repointing job depends on a number of factors, which I'll go through below. ## What Affects How Long Repointing Lasts? ### 1. The Quality of the Original Work This is the biggest factor. Repointing done properly — with the joints raked out to the correct depth, the correct mortar mix, and the right finishing technique — will outlast a rushed job by decades. Joints need to be raked out to a minimum depth of around 20mm to give the new mortar enough key to bond properly. If the old mortar is just scratched back and a thin layer applied over the top, it will fail within a few years. ### 2. The Mortar Specification Using the correct mortar for the property makes an enormous difference to longevity. Lime mortar on a pre-1920s property will flex with the building's natural movement and allow moisture to escape — both of which extend its life significantly. Cement mortar on the same property will crack as the building moves, and trap moisture that accelerates deterioration. I've seen cement repointing on Victorian brickwork fail within ten years because it was simply the wrong material for the job. ### 3. Exposure and Orientation Walls that face into prevailing weather — in the UK, that's typically south-west facing elevations — will experience more weathering than sheltered walls. High-exposure locations like coastal areas or elevated sites will also see faster wear. This doesn't mean repointing won't last — it just means those elevations may need attention sooner than others. ### 4. The Condition of the Bricks If the bricks themselves are in poor condition — spalling, cracked, or saturated with moisture — even perfect repointing won't perform as well as it should. The mortar and the bricks work together as a system. If one element is compromised, it affects the other. Before I start any repointing job, I assess the condition of the bricks as well as the mortar. If there are bricks that need replacing, it's always better to deal with them at the same time rather than repoint around them. ### 5. Ongoing Maintenance Brickwork that's kept in good condition lasts longer. That means keeping gutters and downpipes clear so water isn't constantly running down the face of the wall, making sure vegetation isn't growing into the joints, and addressing any cracks or damage promptly before they allow water ingress. A small repair done early is always cheaper than a large repair done late. ## How Do I Know When Repointing Needs Doing Again? You don't need to wait for a set number of years — just keep an eye on the condition of the mortar joints. Signs that repointing is needed include: - **Mortar that is crumbling or powdering** when you press it - **Recessed joints** where the mortar has shrunk back from the face of the brick - **Missing mortar** in sections of the wall - **Damp patches** on internal walls, particularly after heavy rain - **Efflorescence** — white salt deposits on the brick face, which indicate moisture movement through the wall If you're seeing any of these, it's worth getting the wall assessed sooner rather than later. Water ingress through failed mortar joints is one of the most common causes of structural damp in older properties. ## Does Lime Mortar Really Last Longer? In my experience, yes — when it's the right choice for the property. The flexibility of lime mortar means it accommodates the natural movement of older brickwork without cracking. It also allows the wall to breathe, which prevents the moisture build-up that accelerates deterioration. The trade-off is that lime mortar takes longer to apply and cure, and it costs more than a standard cement mix. But when you consider that a well-executed lime repointing job can last 50 years or more, the cost per year is actually very competitive. ## What About the Guarantee? I guarantee all of my repointing work. If anything fails prematurely due to workmanship, I'll come back and sort it. That said, the best guarantee is doing the job properly in the first place — correct preparation, correct mortar, correct finish. If you'd like me to assess your brickwork and advise on whether repointing is needed, [get in touch](/contact-us) for a free, no-obligation quote. I cover Essex and London and I'll give you an honest assessment of what's needed and what isn't.