Brick and Masonry Repair Guide: Tuckpointing and More
How to identify masonry problems, when to tuckpoint, repair cracks, and seal brick — with DIY guidance and cost estimates.
Recognizing Masonry Problems
- Tuckpointing needed: Mortar joints recessed more than 1/4", crumbling mortar, water infiltration through joints
- Efflorescence (white staining): Mineral salts deposited by water moving through masonry. Cosmetic issue indicating water infiltration — address the source, not just the staining
- Spalling: Face of bricks popping off. Caused by water freezing in pores. Once started, accelerates rapidly. Common in older soft brick exposed to freeze-thaw cycles
- Structural cracks: Diagonal or stair-step cracks in mortar joints indicating settlement or movement. May require engineering evaluation
Tuckpointing: When and How
Tuckpointing (repointing) replaces deteriorated mortar with fresh mortar. It's essential maintenance — without it, water penetrates and destroys brick from the inside. Cost: $5–25/sq ft depending on depth of removal needed. DIY is possible for small areas with an angle grinder and pointing trowel, but messy and time-consuming. Mortar type must match existing — wrong mortar hardness causes brick damage.
Matching Mortar Correctly
This is where most DIY masonry repairs fail. Old brick (pre-1920) was typically laid with soft lime mortar (Type N or weaker). Modern Portland cement mortars are too hard for old soft brick — they prevent normal expansion and force brick faces to spall instead. Always use Type N or lime-based mortar for older masonry and Type S only for modern brick.