Mortar joints protect the edges of bricks and help keep water out of a wall. Over time, weather and movement can wear them down, but not every crack or discoloration means repointing is needed. Look for patterns such as deep erosion, loose mortar, or moisture inside the building. A careful visual check can help you decide whether to monitor the wall or arrange a masonry assessment before the damage spreads.
Look for Eroded or Missing Mortar
Check the joints between bricks for mortar that has worn back noticeably from the brick faces. Shallow surface wear can be difficult to judge, but joints that look recessed, uneven, or hollowed out deserve attention. Missing sections leave more room for water to enter and can expose the edges of neighboring bricks to damage.
Use a flashlight to inspect shaded areas, corners, and spots beneath roof edges. If mortar is loose or crumbles under gentle pressure from a gloved finger, note where it happens. Avoid scraping or digging into the joints to test them; that can remove sound material and make it harder to assess the wall accurately.
Notice Cracks and Loose Bricks
Fine cracks may come from normal movement, but widening or recurring cracks can signal a problem that needs more than fresh mortar. Pay attention to stair-step cracks that follow the joints, gaps around windows and doors, or cracks that continue through bricks as well as mortar. Photograph them with a date reference so you can compare their appearance over time.
A brick that shifts, bulges outward, or feels loose is a stronger warning sign. Do not push on unstable masonry or try to secure it yourself. Movement can relate to issues beyond worn joints, such as water entry or structural movement, so an experienced mason should assess the cause before any repair begins.
Check for Moisture and Surface Damage
Look for damp patches, peeling interior paint, or recurring moisture near an exterior brick wall. White, powdery deposits on brick or mortar can be a sign that water is moving through the masonry and leaving minerals behind. These clues do not prove that repointing is the answer, but they help identify areas that need closer inspection.
Also watch for bricks that are flaking, splitting, or shedding their outer surface. Water can enter through failed joints, but damaged gutters, leaking flashing, poor drainage, and other sources may also contribute. Repointing without addressing the source of moisture can lead to repeated problems, so note nearby drainage and roof details when you inspect.
Know When to Get an Assessment
Consider a masonry assessment when mortar is missing across several areas, joints crumble easily, cracks are growing, or moisture keeps returning. An assessment can help distinguish local repairs from broader deterioration and identify whether the bricks themselves are at risk. It is especially useful before painting, sealing, or undertaking a renovation that could hide the condition of the joints.
Repointing means removing deteriorated mortar to an appropriate depth and replacing it with mortar suited to the existing masonry. A mismatch in strength or composition can damage older, softer bricks. Share clear photos, the age of the building if known, and any history of leaks or previous repairs. Kansas City Limeworks can help property owners in Kansas City determine what the masonry needs.
Worn or missing mortar, widening cracks, loose bricks, and recurring dampness are practical reasons to take a closer look. Track changes, avoid disturbing the joints, and address water sources alongside mortar repairs. If you are unsure what the signs mean, arrange a masonry assessment to identify a suitable next step.