# When Does Brick Need Repointing?

> When to repoint brick: the signs, a simple key-scrape test, how much recession matters and why failure in one band points to water. Then check your own wall.

URL: https://truecoursemasonrynewark.com/guide/when-to-repoint-brick/

Brick needs repointing when the mortar joints have eroded, cracked, softened or pulled away enough to let water into the wall: joints recessed well behind the brick face, sandy mortar that scrapes out deeply, open gaps, or loose bricks. Where failure sits in one band below a gutter, sill or coping, fix that water source first.

Knowing when to repoint brick saves money in both directions: repointing too early spends on joints that still work, and waiting too long lets water damage the brick. [True Course Masonry Newark](https://truecoursemasonrynewark.com/) repoints brick walls across Newark and Essex County, with the work carried out by licensed and insured contractors, and takes small areas as well as whole elevations. This guide covers the signs, a simple test, how to read where the failure sits, and what decides the timing. For the work itself, see [brick pointing and tuckpointing](https://truecoursemasonrynewark.com/brick-pointing/).

**Key takeaways**

- Repoint when joints stop shedding water, not on a schedule. There is no universal mortar lifespan.
- Signs: recessed, sandy, cracked or missing joints, gaps at the brick edge, loose bricks, damp inside.
- A key or screwdriver scraped along a joint shows how deep the soft mortar goes.
- Joints recessed about a quarter inch or more are generally ready for attention.
- Failure in a band under a gutter, sill or coping points to a water source that needs fixing first.

## Signs a wall needs repointing

The National Park Service's Preservation Brief 2 notes that the decision to repoint usually follows an obvious sign of deterioration: disintegrating mortar, cracks in the joints, loose bricks or stones, damp walls, or damaged plaster inside. On a Newark house, look for:

- joints that have worn back behind the brick face so the brick edges stand out
- mortar that is sandy or powdery and rubs away with a finger
- hairline cracks along the joint or a gap opening between the mortar and the brick
- missing mortar, especially in head joints
- loose or rocking bricks, often near the top of a wall or chimney
- water stains, peeling paint or crumbling plaster on the inside face of an outside wall

One or two of these in a small patch is not the same as a wall full of them. Extent and location matter as much as the signs themselves.

## Recessed and eroded joints

Mortar erodes as rain washes the binder out of the joint surface and freezing loosens the sand left behind. On an old lime-mortar wall this is normal and expected: the joint is the sacrificial part. The question is how far it has gone. A joint recessed slightly behind the face still sheds water. As it recedes further, it forms a ledge that holds rain against the brick and lets water reach deeper into the wall each storm.

A common trade rule of thumb is that joints recessed about a quarter inch or more behind the brick face are due for attention. It is a guide, not a hard line. A crisp, hard joint recessed a quarter inch on a sheltered wall may be fine for years, while a soft, cracked joint barely recessed under a leaking gutter may not be.

## The key-scrape test

You can check a joint's condition from the ground with a house key or a flat screwdriver. Preservation Brief 2 describes scraping mortar with a screwdriver as a starting point for judging its hardness.

1. Pick a joint at a height you can reach standing on the ground.
2. Scrape firmly along it with the tip of the key.
3. Note what happens. A shallow scratch with firm mortar behind it suggests the joint is still sound. Sand pouring out and the key sinking in a quarter inch or more suggests it is not.
4. Repeat on several walls, at different heights, and in a sheltered spot for comparison.

Two cautions. Old lime mortar is supposed to be softer than modern mortar, so a soft surface alone is not failure. And do not dig at joints around loose bricks, on a leaning or bulging wall, or on a chimney; if the masonry is unstable, leave it alone and have it evaluated.

## Where the failure sits tells you why

Mortar on the same wall weathers at different rates depending on how wet it stays. Even, gentle wear across a whole weather-facing elevation usually means age and exposure, and repointing that elevation makes sense. Failure concentrated in a band or patch usually means a water source:

| Where joints fail | Likely water source |
| --- | --- |
| A vertical band under a gutter seam or downspout | Overflow or leaking drainage |
| Below a window | Sill with no slope or drip |
| Just under the top of a wall or parapet | Coping or cap letting water in |
| Upper courses of a chimney | Cracked crown, flashing or exposure |
| Bottom few courses | Splashback, snow, salt, wet soil |
| Around a roof-to-wall joint | Missing or failed flashing |

Preservation Brief 2 is direct about this: the root cause, such as leaking roofs or gutters, settlement, rising damp or extreme exposure, should be dealt with before repointing, or the deterioration will continue and the repointing will be wasted. Newark gives water plenty to work with. NOAA normals for the Newark airport station show 46.6 inches of precipitation a year and about 80 days with a low at or below freezing. White salt deposits near the failing joints are another sign of water moving through; see the [efflorescence guide](https://truecoursemasonrynewark.com/guide/efflorescence-on-brick/).

## When it is urgent and when it can wait

**Do not put it off if:**

- bricks are loose, especially on a chimney, parapet or over a doorway
- water is coming through to the inside
- brick faces near the open joints have started to flake or spall
- joints are open deeply enough to see gaps into the wall

**Can usually be planned for a good season when:**

- joints are recessed but the brick is sound and the inside is dry
- the wear is even and limited to the weather side
- only a small area is affected and nothing is loose

Season matters for the work itself. Fresh mortar needs time above freezing to cure, and NOAA puts Newark's median first fall freeze around November 10, so jobs found in late fall may be better scheduled for spring; the [cold weather masonry guide](https://truecoursemasonrynewark.com/guide/masonry-work-in-cold-weather/) and the post on [pointing brick before the first freeze](https://truecoursemasonrynewark.com/blog/point-brick-before-the-first-freeze/) explain the timing.

## Spot repointing or the whole wall

Spot repointing fits when failure is limited and the surrounding joints are sound. Broader repointing makes sense when spot repairs would leave large areas of failing mortar, or the joints are consistently recessed across whole elevations. Either way, proper repointing cuts out the old mortar, not just the surface, and uses a mix compatible with the brick, as the [lime mortar vs portland cement guide](https://truecoursemasonrynewark.com/guide/lime-mortar-vs-portland-cement/) explains. A skim over shallow joints is not repointing; the [tuckpointing vs repointing guide](https://truecoursemasonrynewark.com/guide/tuckpointing-vs-repointing/) covers the difference.

National cost guides put brick repointing at roughly $3 to $20 per square foot on walls reachable without scaffolding, rising to around $25 per square foot or more on taller walls. Those are national figures, not quotes; joint depth, mortar matching and access decide where a Newark wall lands, as the [brick pointing cost guide](https://truecoursemasonrynewark.com/guide/brick-pointing-cost/) explains. Cracked or spalled bricks found during the work are covered under [brick repair](https://truecoursemasonrynewark.com/brick-repair/).

## Check your wall this weekend

Walk the house in daylight with a key and a phone. Test joints on each side at reachable height, photograph what you find beside a coin, and note anything above the worst areas: a gutter, sill, coping or chimney. That record shows whether you are looking at age, a leak, or both. Send it through the [contact page](https://truecoursemasonrynewark.com/contact/) or start with the [masonry damage assessment](https://truecoursemasonrynewark.com/tools/masonry-assessment/).

## Frequently asked questions

### How long should mortar joints last before they need repointing?

There is no universal number. How long joints last depends on the mortar, the brick, how the joints were placed and tooled, and above all how wet the wall stays. A sheltered wall can keep sound joints for many decades, while the same mortar under a leaking gutter or on a chimney top may fail in a fraction of that time. Judge the joints by their condition, not their age.

### My mortar scrapes out with a key all over the house. Is the whole wall failing?

Not necessarily. Old lime mortar is meant to be soft, and the surface of almost any old joint scratches easily. What matters is how deep the soft, sandy material goes and whether sound mortar sits behind it. If a key digs in only a little before meeting firm mortar, the joints may be fine. If it keeps going, with sand pouring out and gaps opening, that area needs repointing. Test several walls, high and low, before deciding.

### Should brick be repointed before or after it is cleaned or paint is stripped?

It depends on the joints. Preservation Brief 2 advises that where the joints are basically sound and need only selective repointing, it is generally better to repoint after cleaning or paint removal. Where mortar has eroded badly enough to let moisture deep into the wall, repointing should come before cleaning, so cleaning water and chemicals do not soak into open joints.