Masonry: movement joints, expansion and cracking
Distinguish expected wall movement from support, corrosion or structural problems and avoid rigidly filling a joint intended to move.
VERT / GREEN
Map existing joints, corners, long walls, openings and support changes.
JAUNE / YELLOW
Brick and masonry change dimension with moisture/temperature; missing or poor joints can concentrate cracking.
ROUGE / RED
Crack with displacement, unstable veneer, corroded lintel or movement joint rigidly mortared: diagnose before cosmetic repointing.
Quick triage
What the professional checks
The masonry/structural specialist checks support, ties, lintels, thermal/moisture movement, joint locations and sealant compatibility.
Official sources
Checked 2026-08-23
Tools related to this issue
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