Roof Safety Setup: Anchors, Harnesses, Ladders and Safe Footing
6 step by step guides
Falls are the way roofers get killed. Every other hazard on a roof, from nail guns to hot work, is smaller than the simple fact that the ground is a long way down. In British Columbia the OHS Regulation, Part 11, requires fall protection when a fall of 3 metres (about 10 feet) or more could occur, and also at lower heights where the fall could cause more injury than landing on a flat surface. On a pitched roof, that is almost always the case.
Fall protection is a system, and every link has to work. It starts with getting onto the roof safely, see how to set up and tie off an extension ladder, and with knowing the ground you are standing on, see how to walk a roof safely. Then comes the system itself: a roof anchor fixed into framing, a properly fitted harness, and a lifeline with a rope grab that is the right length for the roof.
One more hazard is easy to overlook because it cannot be seen: energized wires. Service drops and overhead lines run close to many Fraser Valley rooflines, and working near power lines has fixed limits of approach. These guides explain the setup step by step, but they do not replace a fall protection plan, training or the current WorkSafeBC requirements, which you should always check.
Roof Safety Setup Guides
- Guide 1How to Install a Roof AnchorA temporary roof anchor is a steel plate with a D-ring, nailed through the shingles into the rafters near the ridge so a lifeline can clip to it. Find the rafter, fit the anchor in line with the work area, drive every specified fastener into solid framing, and never rely on the sheathing alone. Fall arrest anchors must be rated for at least 22 kN (5,000 lb) unless an engineer designs otherwise.Advanced20 to 40 minutes per anchor
- Guide 2How to Fit and Inspect a Fall Arrest HarnessBefore each use, inspect the harness webbing, stitching, buckles and D-ring for cuts, fraying, chemical damage, heat damage and corrosion, and check the label and date. Then put it on: D-ring between the shoulder blades, leg straps snug, chest strap at mid chest, all slack removed. A harness that has arrested a fall must be removed from service until the manufacturer or an engineer recertifies it.Beginner10 minutes
- Guide 3How to Set Up a Lifeline and Rope GrabA vertical lifeline hangs from a rated anchor above the work area, and a rope grab on your harness slides along it, locking in a fall. Set the anchor high and in line with the work, tie the line off at the bottom, keep it clear of edges, and confirm there is enough clearance below for the fall distance. Write the rescue plan before anyone goes up.Advanced20 to 30 minutes
- Guide 4How to Set Up and Tie Off an Extension LadderSet an extension ladder at a 4 to 1 angle, with the base one foot out for every four feet of height, about 75 degrees. Extend the ladder about 1 metre (3 feet) above the roof edge, put the feet on firm level ground, tie off at the top, and keep three points of contact. Never overreach, and never use the top rungs to step onto the roof.Intermediate10 to 15 minutes
- Guide 5How to Work Safely Near Power Lines on a RoofBefore any roof job, find every overhead wire and assume it is live. In BC, workers and their tools must stay at least 3 metres (10 feet) from overhead lines over 750 volts and up to 75 kV, with larger distances for higher voltages. Carry ladders and metal panels flat, use nonconductive ladders, and call BC Hydro or FortisBC to have lines de-energized, covered or moved when work has to go closer.Advanced15 minutes of planning per job
- Guide 6How to Walk a Roof SafelyWalk a roof only when it is dry, free of frost and moss, and in daylight. Wear soft-soled boots with good tread, stay on the lowest pitch you can, keep your weight over your feet and use three points of contact on steeper slopes. Always use fall protection on steep pitches or where a fall could be 3 metres (10 feet) or more.IntermediateApplies to every roof visit
Also on this site
Roof Safety Setup: Common Questions
At what height do you need fall protection in BC?
Under Part 11 of the WorkSafeBC OHS Regulation, fall protection is required when work is done where a fall of 3 metres (about 10 feet) or more could occur, or where a fall from a lesser height could cause more injury than landing on a flat surface. Sloped roofs, openings and edges often meet that second test even below 3 metres, so check the current regulation for your situation.
Do roofers have to wear a harness on every roof?
Not on every roof, but on most. The requirement is triggered by the height of a possible fall and by the risk of injury, not by the type of roof. A low, walkable roof with a perimeter guardrail may not need a harness, while a steeper roof or one with open edges typically does. Whoever is in charge of the site decides the system and must be able to show why.
What is the difference between fall restraint and fall arrest?
Fall restraint keeps a worker from reaching the edge at all, using a short lanyard or line that physically stops them before they get there. Fall arrest allows a fall to begin and then stops it with an energy absorber, which needs more clearance below and a much stronger anchor. Restraint is preferred where it is practicable because it prevents the fall altogether.
Can I use a roof anchor on my own house?
Homeowners are not employers, but the physics are the same. A temporary anchor must be fastened into the rafters or trusses, not just the sheathing, with the full fastener count the manufacturer specifies, and used with a harness that fits. If you are unsure about the framing, the roof pitch or the clearance below, the safe decision is to have a professional do the work.
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