This tool will give you a sturdy and level base to place your ladder on slanted ground.
Set up ladder on angled roof.
Lashing your ladder although not a perfect solution one of the fastest and easiest methods of securing a ladder for a slope is to lash it.
The general rule of thumb to follow is maintaining an ideal ladder placement ratio of 75 degrees.
Essentially this involves using rope cable or a ladder lashing kit to tie the rope to a secure point in order to prevent it from slipping or falling as you climb up.
Your ladder should be 1 meter out for every 4 meters up and the ladder legs will create a 75 degree angle with the garage roof or first story roof.
Any ladder that does not support itself predominantly single pole and extension ladders needs the correct ladder angle to keep it both sturdy and safe.
Stand facing it with your feet touching its feet and your arms extended your palms should rest on a rung at shoulder height.
Set up the ladder by following the angle rule or 4 1 rule.
Set up the ladder the next thing on your to do list would be to take the ladder up to the roof and start setting it up.
If you need to use a ladder on a steep shingle roof you need a pivit ladder tool.
The pivit ladder leveling boxes are lined in rubber so that you a have traction to shingled roofs and provides some protection to the shingles.
For a quick check on the angle of your ladder.
To protect your asphalt roof avoid putting the metal sides of a ladder down on the roof surface without protecting the shingles.