Monitor accumulation, drains, vents and exits from a safe location.
V16 — system diagnostic
Roof snow, ice and overload
Distinguish winter maintenance, ice dams and structural overload signs before going onto the roof.
Checked: 2026-08-22
Rain-on-snow, thaw cycles and asymmetric accumulation can greatly increase roof loads.
Sagging, unusual cracking sounds, suddenly binding doors or dangerous high accumulation: clear the area and use a professional.
Useful tools / data
- Ground-based observation
- Dated photos after storms/thaws
- Drain/vent map
What the professional checks
- Assess overload and load distribution
- Remove snow without local overloading or membrane damage
- Diagnose ice dams through envelope/attic conditions
Sources and limits
Requirements depend on location, building, product and scope. RenoAtlas helps prepare the decision; it does not replace required analysis, permits, laboratory work or professionals.
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.
V17
Specialized systems to cross-check
V17 completes gas, soil, water, fire, climate and structural interfaces.
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.
Legacy conditions and resilience systems
Check these before enclosing, excavating, modernizing or automating an existing system.
Advanced systems and special cases
Checks that change sequencing, risk or which professionals must be coordinated.
Hidden systems and critical interfaces
These checks target costly problems that often appear only after opening assemblies, conversions or changes of use.
Building interfaces to diagnose before enclosure or replacement
These tools connect structure, water, air, frost, wind and mechanical systems so repairs do not hide the cause.
Hidden details to verify before repair or enclosure
These diagnostics separate simple maintenance from measurement-first and conditions where structure, fire or services require professional review.
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.
V28
Finish and service details to verify
V28 connects small details that become costly once finishes are closed.
V30
Shared, access and specialized interfaces
V30 connects projects where multiple systems, owners or rules meet.
V32
Post-disaster and legacy systems
V32 connects contamination, storm damage, legacy materials and recommissioning before rebuilding.
Before finalizing the project
V35 checks that can change drawings, permits, construction methods or structure.
- Professional plans: architect, engineer or other designer?
- Permit closeout, final inspection and occupancy
- Variance, design review and discretionary planning approval
- Temporary construction heating and drying
- Hot work, permits and fire watch
- Infrared thermography and moisture mapping
- Well yield, recovery and storage
- Snow drift at additions and roof steps
- Balloon framing and continuous cavities in old homes
- Wetlands and watercourses before construction
V47
V47 interfaces not to miss
These details are small on a drawing but can control water, structure or durability.