Foundation crack: injection, waterproofing or structural repair?

Choose a repair method only after distinguishing stable shrinkage, water leakage and active structural movement.

Decision triage

VERT / GREEN · JAUNE / YELLOW · ROUGE / RED

What the professional checks

The professional checks history/movement, geometry, reinforcement/support, water and drainage, then distinguishes sealing, injection and structural repair/reinforcement.

Official sources

Sources checked: 2026-08-24

Related path

Continue with the right tools

These links connect this page to the next useful checks and decisions without repeating the full content.

Plan a complete construction projectConnect feasibility, design, permits, concealed work, commissioning and closeout.Open →Check permit triggersPrepare the questions and documents to confirm with the local authority.Open →Check a contractorDocument licence, insurance, scope, payments, changes and warranties.Open →Update a construction costEscalate a historical cost using comparable index values.Open →Prepare pre-delivery reviewRecord documents, enclosure, systems, finishes and deficiencies before closeout.Open →

Tools related to this issue

V14

Systems to check before closing the work

V14 connects envelope, air, fire, structure, water and code instead of treating each project in isolation.

Renovation dependenciesLoad-bearing walls and openingsRoof penetrations and flashingCode versions
V16

Advanced diagnostics to cross-check

V16 connects water, soil, climate, safety, materials and seasonal use to existing projects.

Drinking-water quality and treatmentRoof snow and iceJobsite safety and silicaPyrite, pyrrhotite and ochre
V17

Specialized systems to cross-check

V17 completes gas, soil, water, fire, climate and structural interfaces.

Seismic retrofitWildfire and embersCrawl spaceUnderpinning and lifting
V18

Specialized diagnostics to verify

V18 connects systems that become costly or regulated when a primary project triggers them.

Radon mitigationLow-slope roofRoof deck over living space
V19

Edge systems to integrate into the project

V19 covers interfaces that become important when multiple home systems interact.

Skylight/tubular daylightingGreen roofSIP/ICFStormwater infiltration
V26

Often-overlooked service interfaces

V26 connects systems that cross utility, plumbing, HVAC, envelope and metering boundaries.

Electrical service, mast and meter
V27

Project risks and overlooked interfaces

V27 connects payment, water, envelope, ventilation and jobsite details that often create costly surprises.

Gutters, downspouts and roof drainageTemporary weather protection during renovationLaundry room leak containment
V28

Finish and service details to verify

V28 connects small details that become costly once finishes are closed.

Slate or clay tile roofingOutdoor faucet: freeze and backflow protectionCladding clearance above grade
V30

Shared, access and specialized interfaces

V30 connects projects where multiple systems, owners or rules meet.

Solar PV: roof attachment, structure and flashing
V32

Post-disaster and legacy systems

V32 connects contamination, storm damage, legacy materials and recommissioning before rebuilding.

Hail: roof and envelope impact assessment
V33

Invisible constraints before work

V33 checks electrical, legal, environmental and climate constraints that can block a project before demolition starts.

Permafrost and northern home foundations
V34

Use, excavation and construction constraints

V34 connects use permits, soil, excavation, neighbouring structures and public-space logistics before hard-to-reverse work.

Excavation shoring and adjacent structuresPreconstruction condition survey of neighbouring buildings
V47

V47 interfaces not to miss

These details are small on a drawing but can control water, structure or durability.

Roof-wall kickoutRoof-edge drip