Verify
Direction, width, length and progression of the crack.
Home diagnosis
Crack near a window lintel
A crack above or at the corners of an opening can result from movement, corrosion/expansion of a steel lintel, deficient support or water detailing. Crack shape helps diagnosis but is not enough by itself.
What to look at
Rust, spalling, open joints, frame movement and flashing condition.
Other aligned cracks or distortion of the opening.
Stop point
Professional
Opening crack, loose units, heavily corroded lintel, leakage or distortion = assessment before cosmetic repair.
Useful record
- Dated overview and close-up photos.
- Simple repeated measurements at the same safe location.
- Associated events: rain, freeze/thaw, recent work or impact.
- Do not conceal the defect before inspection when progression or cause is uncertain.
Related path
Continue with the right tools
These links connect this page to the next useful checks and decisions without repeating the full content.
Connect symptoms to the enclosureStart from condensation, staining, odours or movement before choosing a repair.Open →Adapt the enclosure to climateConnect heat, cold, water, wind and wildfire to building priorities.Open →Assess overall resilienceReview water, climate, safety, autonomy and records with a local score.Open →Screen hazardous materialsIdentify situations where work should stop and testing is needed before disturbance.Open →Open climate guidanceReview climate constraints relevant to assemblies and materials.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.
V18
Specialized diagnostics to verify
V18 connects systems that become costly or regulated when a primary project triggers them.
V19
Edge systems to integrate into the project
V19 covers interfaces that become important when multiple home systems interact.
V26
Often-overlooked service interfaces
V26 connects systems that cross utility, plumbing, HVAC, envelope and metering boundaries.
V27
Project risks and overlooked interfaces
V27 connects payment, water, envelope, ventilation and jobsite details that often create costly surprises.
V29
Household safety and compliance details
V29 connects smaller risks that often fall between finishes, appliances, plumbing and local code.
V30
Shared, access and specialized interfaces
V30 connects projects where multiple systems, owners or rules meet.
V31
Commissioning and everyday safety
V31 helps verify systems after work and document the values that make a home safer to operate.
V32
Post-disaster and legacy systems
V32 connects contamination, storm damage, legacy materials and recommissioning before rebuilding.
V34
Use, excavation and construction constraints
V34 connects use permits, soil, excavation, neighbouring structures and public-space logistics before hard-to-reverse work.