Does Your Entire Building Need Repointing or Just Certain Areas?

Mortar joints wear differently across a building depending on sun exposure, drainage patterns, and original construction quality. When a property owner notices crumbling mortar in one spot, the natural question is whether the whole facade needs attention or if the problem is isolated. Getting this assessment right saves money and prevents unnecessary work on masonry that still has years of life left in it.

TL;DR: Repointing needs are usually determined by wall orientation, moisture exposure, and age of prior repairs rather than the age of the building as a whole, so a proper assessment should look at each wall section individually before recommending full or partial repointing.

How to Tell If My Building Needs Repointing?

Mortar joints are meant to wear before the brick or stone does, since mortar is the more replaceable material. Signs that repointing should be considered include:

• Mortar that has become soft or powdery

• Joints deep enough to fit a fingertip

• Visible cracking that runs along the joint lines

• Water staining on interior walls near exterior masonry

A visual inspection checklist can help property owners catch these signs early, though a hands-on assessment from a mason is the only reliable way to confirm how far the deterioration extends.

Signs You Need Full Building Repointing

Full repointing tends to make sense when deterioration shows up across multiple elevations rather than in one contained area. Buildings constructed before the 1930s often used lime-based mortar, which behaves differently than modern portland cement mixes and wears at a more uniform rate across the structure. If the building has never been repointed and joints throughout show consistent wear, a full repointing project protects the masonry more effectively than patching individual sections. That said, age alone is not the deciding factor. A well-maintained 100-year-old building may need less work than a 40-year-old one that was built with lower quality mortar or has had water intrusion issues.

A building we walked past the other day, which shows that it was obviously spotpointed

Signs You Only Need Spot Repointing

Spot repointing is appropriate when the surrounding mortar remains hard, intact, and well-bonded to the masonry units. This is common on north-facing walls that see less sun and freeze-thaw cycling, or on sections that were previously repaired with a compatible mortar mix. Chimneys, parapet caps, and window sills often deteriorate faster than the rest of a building because they take on more direct water exposure, making them good candidates for targeted work rather than a full repointing project.

Why Partial Repointing Can Backfire

A spot repair done with the wrong mortar mix creates problems that are often worse than the original issue. Mortar that is harder than the surrounding material forces moisture to escape through the brick or stone instead of the joint, accelerating spalling and cracking. Mismatched patches also tend to stand out visually, which matters for buildings where curb appeal or historic character is part of the value.

How JMS Masonry & Restoration Approaches Repointing Assessments

JMS Masonry & Restoration provides repointing assessments to the Greater Boston area, evaluating each elevation separately rather than assuming a building needs uniform treatment. 

Our team tests mortar hardness by hand, checks for consistent patterns of failure, and looks at drainage and flashing details that may be contributing to localized wear. This approach lets property owners invest in the sections that actually need attention rather than paying for work that isn't necessary yet. 

A repointing assessment is a reasonable first step before committing to any scope of work, whether that turns out to be a single wall or the entire building. Contact JMS Masonry & Restoration today for a free masonry consultation in the Boston area.