- At least two roof safety hooks are needed in staggered arrangement to ensure secure fastening. For ladders up to 4.20 m in length, two load-bearing roof safety hooks are needed.
- For each additional ladder section of 2.00 / 2.80 m in length, one extra hook is required; for a length of 4.20 m, two extra hooks will be needed.
- Supporting safety roof hooks must be fitted centrally on the rafters. Smallest rafter circumference: 60 x 80 mm.
|For Pantiles and interlocking roof tiles:||No|
|For beavertail tiles:||yes|