Is this -- http://www.menards.com/main/building...004-c-5728.htm -- the right material for a waterproof membrane? (mentioned here -- http://www.thisoldhouse.com/toh/how-...262821,00.html )

also..

Should I use the spacer block as mentioned here -- http://www.thisoldhouse.com/toh/how-...262821,00.html -- or is sheathing-membrane-ledger-membrane-flashing good enough? The approach here seems to be sheathing-membrane-spacer-ledger-membrane-flashing.