Look at an old chimney and you'll usually find the brick outlasting the mortar — that's by design. Mortar is the softer, renewable part of the wall. But in Minnesota, decades of freeze-thaw cycles, wind-driven rain and ice eventually reduce joints to sand, and once joints open, water moves in and the damage accelerates from maintenance to structure.
Eagle Chimney MN provides tuckpointing, repointing and masonry repair across the Twin Cities — grinding out failed mortar, packing in fresh mortar matched to your chimney, and replacing brick that's too far gone to save.
Signs Your Mortar Needs Repointing
- Mortar that crumbles or powders when you rub it
- Joints recessed noticeably behind the brick face
- Cracked, separated or missing mortar sections
- Brick faces flaking or popping (spalling) near failing joints
- Plants or moss taking root in the joints
- Water staining or leaks that trace back to the chimney body
How Proper Repointing Is Done
Good repointing is more than smearing new mortar over old. We rake or grind the failed joints out to a proper depth, clean them, and pack fresh mortar in layers, tooled to match the existing joint profile so water sheds the way it should. The mortar itself matters: it must be compatible with your brick — too hard a mix damages soft historic brick, too soft won't last. On chimneys where individual bricks have spalled or cracked, we cut them out and replace them with matching units.
- Failed mortar removed to sound material
- Fresh mortar matched in strength, color and profile
- Joints tooled for weather shedding, not just looks
- Damaged bricks replaced with matched units
- Partial or full rebuilds above the roofline when structure requires it
Why Timing Matters Here
Repointing is the classic repair that gets more expensive every year you wait. Open joints admit water; water freezes; freezing splits brick and blows joints wider. A chimney repointed while the brick is still sound stays a maintenance item. The same chimney five winters later may need sections rebuilt. If you can see crumbling joints from the ground, it's already worth a look.