Safety
A correct calculation does not make a project safe.
Stop and obtain help
Asbestos, significant mould, gas, unstable structure, open electrical panel, unknown wiring, active leak, damaged foundation or uncontrolled work at height.
Generator
Never feed a house through a wall outlet. Use directly connected appliances or approved transfer equipment installed by a qualified person.
Before demolition
- Locate services.
- Test suspect materials.
- Plan dust, ventilation, protection and disposal.
Masks and respirators
An N95 protects against certain particles, not vapours. Facial hair in the seal area, the wrong size or an incorrect cartridge can defeat protection.
Choose the right respiratorRelated 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 →