Chimney masonry repair in Fargo

Crumbling mortar and flaking brick are what Fargo winters leave behind. Here is how masons fix them, and when a rebuild beats another repair.

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Signs the masonry is failing

Sandy, crumbling or missing mortar between the bricks
Brick faces flaking off in layers, which is called spalling
White powder or dark damp patches on the surface
Gaps or cracks wide enough to slide a coin into
A chimney that leans or has pulled away from the house

Tuckpointing: replacing failing mortar

Tuckpointing, also called repointing, means grinding out the old mortar and filling the joints with new mortar. It is the standard fix when the bricks are sound but the joints have worn out. Typical cost is $500–$2,500.

Bricks that have lost their faces are cut out and replaced one at a time.

Partial and full rebuilds

When the brick is flaking through or the top section has loosened, a mason takes the exposed part down and lays it back up. A partial rebuild above the roofline typically costs $1,000–$5,000. A full rebuild, or one that goes below the roof, can run $5,000 to $15,000 or more.

A rebuild costs far more than repointing, so a good mason will tell you where the damage stops.

Mortar and brick need to match

On an older home, ask what mortar the mason plans to use. Hard modern mortar on soft old brick can make the brick crumble instead of the mortar. New brick should match the old in size, colour and hardness.

Leaning or settling chimneys

A chimney that tilts or has separated from the house can point to a footing problem, not just worn mortar. Have it assessed before anyone repoints it.

Safety

Loose brick can fall. Keep people and pets away from the base of a chimney that is shedding brick, and do not light fires in a chimney with visible gaps.

Chimney details, up close

A tall red brick chimney on a roof with moss in the mortar joints and flashing peeling away at one corner — Brick chimney with moss in the joints and lifting flashing (Mettmann, Germany). Photo: KaiKemmann.

Two chimney stacks on a slate roof, one stone and one brick, each topped with a clay chimney pot — Two chimney stacks with clay pots (Horbury, England). Photo: Tim Green.

The frozen Red River of the North under snow, with bare trees along its banks — The Red River of the North, frozen, at Fargo (FEMA, 2009). Photo: Michael Rieger / FEMA.

A brick chimney seen from an attic with crumbling mortar, loose bricks and orange brick dust at its base

Spalling brick and failed mortar in a chimney. Photo credit: Beltedweir.

Common questions

RepairHow do I know if I need tuckpointing or a rebuild?

If the bricks are sound and only the mortar is worn, tuckpointing usually does it. If brick faces are flaking through, the top is loose or the stack leans, a rebuild is more likely. A mason can usually tell from a close look.

WinterCan chimney masonry be repaired in winter?

Fresh mortar needs mild weather to cure, so most masonry work waits for spring. Covering and stabilizing a damaged chimney can be done in winter. A pro can tell you what can wait.

PermitsDoes a chimney rebuild need a permit?

Rules vary by city. Ask the contractor whether a permit is required and who pulls it before work starts.

CostHow much does a chimney rebuild cost?

A partial rebuild above the roofline typically runs $1,000–$5,000 and a full rebuild $5,000–$15,000 or more. Those are national ranges, and brick matching and scaffolding move the price.

Keep reading

Last updated October 26, 2026.

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