Repointing mortar in brickwork

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Here is an email I recieved

"The brickwork condition with loose mortar..." Mortar Repoint.jpg

"Thanks for the photo.. I'll put it to good use"

Mortar Repoint1.jpg

Could possibly be caused by bad mix, Aerating additive added to lime based mortar mixes ,etc

Stages

A. Air bubbles in mortar weakening strength and durability

B. Air voids enlarge

C. Chunks of mortar errode and fall out

D. Eventually wall becomes unstable

Repointing should be carried out at C well before D

Again, thanks for the photos as it will help many others with similar issues

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