Does every crack in mortar mean repair is needed?

Not always. Hairline cracks can sometimes be cosmetic. Wider cracks, recessed joints, and joints that crumble to the touch are more serious. The pattern of cracks matters too, especially if it suggests structural movement.

Can mortar be partially repaired?

Yes. If only a section of joints are failing, we can tuckpoint that section without disturbing sound joints. Repairing joints that do not need it is not part of an honest repair.

How quickly should I act on failing mortar?

It depends on the location, the extent, and the time of year. Failing mortar on a chimney or near the top of a wall is more urgent than failing mortar on a low garden wall. Heading into a Michigan winter raises the urgency on any of it.

Does failing mortar weaken the wall itself?

Yes, over time. Mortar joints transfer load between bricks and seal water out. When the joints fail, both jobs are compromised, and the brick around the joint becomes more exposed.

How to Tell if Your Mortar Is Failing

Mortar is the part of a brick wall that usually wears out first. Bricks themselves can last for a century. The mortar between them does not, especially in Michigan freeze-thaw conditions. Catching failing mortar early often means a tuckpointing job. Catching it late often means brick replacement too.

This article walks through what failing mortar looks like, the simple checks you can do from the ground, and why waiting longer usually increases the scope of the repair.

What to look for

Cracks running through the mortar joints, especially if they extend across multiple bricks
Joints that look recessed compared to the brick face
Mortar that feels sandy or crumbles to the touch
Sections where mortar is missing entirely, leaving open joints
Mortar pieces or sand on the ground near the wall
White powdery deposits (efflorescence) on the brick around the joint
Brick that is no longer firmly held in place

Water entry risks

Mortar joints are part of a wall's weather seal. When the joints are sound, water rolls off the wall. When the joints have failed, water has paths into the brick courses, behind the wall, and in some cases into the home. In Michigan, water that gets into the wall in fall has all winter to freeze, expand, and do damage.

Some of the issues that follow water entry through failing joints:

Spalling brick faces
Interior water staining
Peeling paint on adjoining walls
Increased efflorescence on the wall surface
Loose brick after a few freeze cycles

Why brick can loosen when mortar fails

Bricks are held in place by the bond between brick and mortar. When the mortar loses its strength, the bond weakens. A wall that looked solid five years ago can start to have bricks that shift, tilt, or even fall out when mortar is too far gone.

Loose brick is one of the clearest signs that tuckpointing is overdue and that part of the repair may include resetting or replacing the affected bricks.

The simple homeowner test

You do not need any special tools. Walk around the home with a flathead screwdriver and gently press the tip into mortar joints in a few locations.

Firm: the joint is still doing its job
Easy to scratch: the joint is softening and worth keeping on the radar
Crumbles or comes out as sand: tuckpointing may be overdue in that area

Test multiple spots. Sometimes the south or west side of the home weathers faster because it sees more sun and rain. Sometimes the top of a chimney is worse than anywhere else.

Why waiting too long increases the scope

Tuckpointing is a relatively contained repair. The brick is left in place. The mortar is renewed. When the mortar is caught while the brick is still sound, that is usually the entire scope.

Once water has been getting into the brick courses for years, the picture changes. Bricks may have spalled. Sections may have shifted. The repair may include replacing brick, matching brick on an older wall, and possibly addressing the structure below. Our article on what happens when you wait to repoint covers this in more detail.

What to send us

A wide photo of the wall or chimney
Close-ups of the joints that look worst
Any brick that is loose, cracked, or spalled
A short note on the age of the home and when you first noticed the issue

Send your photos through our contact form and we will let you know what we see.