Masonry Projects, Brick Removal/Replacement, Repointing

One of the keys to preserving masonry is to recognize problems when they occur and make the necessary repair. Most masonry products are similarly manufactured. Masonry "units"– either bricks, concrete blocks or stones - are laid on beds of mortar (the mortar joints) and left to harden. These joints are designed to be weaker than the "units." This weakness ensures that the joints will deteriorate first, making it cheaper and easier to repair the masonry. Masonry is designed to react to the environment so that it will break down in three stages:

The three stages of degradation:

1. Bond Breaks:

Cracks develop parallel to the lines of the mortar joints. Cracks increase in density within a localized area. Water
Seeps into these cracks and causes further damage.

2. Decomposition of Joints:

Cracks running perpendicular to the joints connect with the parallel cracks. Pieces of mortar joint at these intersections start failing – water penetration worsens. Bond breaks begin in surrounding areas of the wall.

3. Unit Failure:

As mortar joints erode, damage spreads to the masonry "units." Faces of bricks spall (peel off), cracks develop in units. Units loosen. Damage accelerates rapidly.

TUCKPOINTING

Tuckpointing is the process of removing old mortar from the joints of masonry, brick, or stone and replacing it with new mortar that maintains the appearance of the building while enhancing its strength and resistance to weather.

Masonry Projects, Brick Removal/Replacement, Repointing Masonry Projects, Brick Removal/Replacement, Repointing Masonry Projects, Brick Removal/Replacement, Repointing Masonry Projects, Brick Removal/Replacement, Repointing
Masonry Projects, Brick Removal/Replacement, Repointing Masonry Projects, Brick Removal/Replacement, Repointing Masonry Projects, Brick Removal/Replacement, Repointing  

 

 

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