Walking on a Spanish tile roof

I wanted to tell you and your readers that I own a 1928 Spanish Colonial Revival with a "tile" roof.  Your comments about preventing cracking is very beneficial and I've referred to them several times since I've been following your site. 

Just a little trick I learned when dealing with any slate/clay tile 
roofing:

Take several sand bags and fill up to about 75% of capacity (40lbs)
Place two sand bags approx. 12 ft apart on your roof
Place a 2x12 on "top"of each sand bag and allow your weight to contour the  sandbag around the tile.
From that point you can work out in any direction to plaster 
windows/walls/etc.
Retrace your steps and "breakdown" each section to the beginning.
 

I've used this technique several times and it works great.  All you need is a bunch of 2x12's and some sandbags.  Not only does it save on roofing repair expenses but it allows you to cover a large area.  It's almost like  having scaffolding on your roof.

Take care Reggie!