Well,,sort of ,,but once it does leak then you wish you had of roofed it sooner..LOL
when I was younger I used to walk all over these roofs and need hardly ever any thing to keep me up there ,,but the C-clamps to hold the board across sure did help..
Next roof job is this one where I will take off all the heavy shakes and put metal on ..Notice the Mosss and fir needle build up on this roof in my part of the country ..