VERT / GREEN
Framing identified and cavities properly compartmented: document before new work.
Balloon framing and continuous cavities in old homes
Recognize multi-storey continuous stud cavities before opening, insulating or routing services because they can transmit fire, smoke and air between levels.
JAUNE / YELLOW
Opening walls/floors in an older house: check cavity continuity and existing fire blocking before closing.
ROUGE / RED
Do not blindly cut, drill or fill an old cavity without understanding structure, services and fire-blocking needs.
Project triage
What the professional checks
- Identify framing type and structural behaviour
- Define fire blocking/compartmentation and penetration details
Official sources
Sources checked: 2026-08-22. Always confirm local rules and the applicable edition.
Related path
Continue with the right tools
These links connect this page to the next useful checks and decisions without repeating the full content.
Screen hazardous materialsKnow when to stop and assess asbestos, lead, vermiculite, mould, silica or radon.Open →Track indoor air qualityLog CO₂, radon, PM2.5, humidity and temperature without turning readings into diagnoses.Open →Prepare the emergency sheetDocument controls, equipment, contacts and critical locations in a printable format.Open →Score home resiliencePrioritize water, outages, fire, climate, health and essential records.Open →Sort observed symptomsConnect a visible sign to plausible causes, urgency and the right professional.Open →
Special check related to this project
V47
V47 interfaces not to miss
These details are small on a drawing but can control water, structure or durability.