Smoke/CO alarms during renovation

Use wall openings and electrical changes to verify certified devices, power, location, interconnection and replacement under local rules and manufacturer instructions.

VERT / GREEN = documenter/entretenir · JAUNE / YELLOW = vérifier avant travaux · ROUGE / RED = arrêter le DIY et faire valider.

Alarm lacks Canadian certification mark
Replace with a device certified for use in Canada. Renovation changes bedroom/hallway
Revalidate location and local requirements before closing walls. CO alarm sounds
Move to fresh air and follow emergency guidance; do not hunt for the source yourself. Inventory/replacement date current
Test and replace per manufacturer; document each device.

What the professional checks

Verify certification, power and local code
Coordinate placement/interconnection with project

Official sources

Santé Canada — sécurité incendie Santé Canada — monoxyde de carbone

Checked: 2026-08-22

Tools related to this issue

Whole-home action plan

Open →

Weather resilience

Open →

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 dependenciesFire safetyRenovating while living at homeCode versions

V28

Finish and service details to verify

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

Post-renovation cleaning and indoor air

V32

Post-disaster and legacy systems

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

Post-fire smoke, soot and wet materials