An easy way to figure the angle is to use a 1 4 ratio.
How to tie a ladder to a roof.
The base of the ladder.
Secure ladder to crossbars.
If you have a telescoping extension ladder wait until you raise it to extend the ladder to the correct height.
How to attach a ladder to a roof 1.
Inspect the roof for an area containing a solid gutter or other fixed object for ladder attachment.
Hold your ladder firmly using your hands to ensure maximum grip on the ladder then move aside from the ladder while placing one of your legs on the roof.
Use a tie down that wraps around the item and the rails.
Repeat the same process to get back to the ladder and down to the gutter level.
You want the ladder to be at least 3 feet higher than your roof line.
Measure the approximate ladder length from the ground to the roof edge with a tape measure.
Next you should check the base to see if there are objects that might cause slip and fall.
The second option is the side racks.
It is always best to use both hands to hold the ladder and move one leg to the roof.
Once that is done you need to secure your ladder at the top by tying it using a rope to the building.
On each side of the roof you ll see a rack that runs the length of the roof of the vehicle.
Additionally extend the ladder 3 feet above the apex of the roof.
How to tie a ladder to a roof rack step 1.
Move the other leg on the roof such that both your legs are on the roof.
Have a helper aid.
This is precisely the same procedure you should take when you are moving back to the ladder from the ceiling.
Additionally you d want to make sure that safety feet are safe.
Stand on the bottom.
Then move the other leg to the roof gently to be fully on the roof.
Make sure that your ladder s feet rest on an even surface.
A few days ago i found myself needing to take a ladder home with me from work and since my car doesnt have a roof rack yet i had to be creative.