Recessed lights under attic insulation: heat, air and safety
Before adding attic insulation, identify recessed lights and determine which may be covered or require clearance/approved protection.
VERT / GREEN
Locate every fixture before blowing insulation and keep its markings/model.
JAUNE / YELLOW
Standard recessed lights are hard to air-seal and can become a fire hazard when covered by insulation.
ROUGE / RED
Unknown fixture already buried, overheated wiring, abnormal heat/odour or improvised enclosure: de-energize and have it checked.
Quick triage
What the professional checks
The electrician/envelope specialist confirms fixture type, clearance, thermal protection, wiring, air sealing and insulation compatibility.
Official sources
Checked 2026-08-23
Continue with the right tools
These links connect this page to the next useful checks and decisions without repeating the full content.
Systems to check before closing the work
V14 connects envelope, air, fire, structure, water and code instead of treating each project in isolation.
Remaining system checks not to miss
V15 covers issues that can block a project, cause a loss or become expensive once concealed.
Advanced diagnostics to cross-check
V16 connects water, soil, climate, safety, materials and seasonal use to existing projects.
Edge systems to integrate into the project
V19 covers interfaces that become important when multiple home systems interact.
Often-overlooked service interfaces
V26 connects systems that cross utility, plumbing, HVAC, envelope and metering boundaries.
Finish and service details to verify
V28 connects small details that become costly once finishes are closed.
Household safety and compliance details
V29 connects smaller risks that often fall between finishes, appliances, plumbing and local code.