On high barrel tiles such as eagle roofing products capistrano concrete roof tile profile you should distribute your weight with the heel and toe on the high points of adjacent tiles.
How to walk on barrel tile roof.
A normal walk is not generally the best approach upon a tile roof.
I find defects with 85 of the concrete tile roofs i inspect.
If you do decide to go up there you will need to spread your weight out over a large area so using a piece of plywood over the tiles might allow you to walk over them.
Orient your feet in a direction parallel with the ridge and try to distribute your weight evenly walking as softly as possible.
Tips for walking on your roof.
Instead transfer your weight gradually as you walk and curve your step with the arc of the tile as it falls.
Walking on an existing barrel tile roof is a very chancy thing and even if you do everything right.
It can still go wrong.
Walk on the balls of your feet.
Never jump or leap from tile to tile.
Since the heels are usually the thickest part of your shoe they are more likely to break your tiles when you step on them.
But sometimes you have no choice and you have to walk on the roof.
Walk on the balls of your feet to reduce the pressure on the tiles.
Distribute your weight evenly.
Essentially with each step place the heel of your foot in the gap between tiles roll the arch over the tile and end up with your toe in the next gap.
When choosing a home inspector ensure they will walk on the concrete tile roof.