Fold the membrane lengthwise along its center line to form a right angle. Apply it over the ledger-to-house joint so one leg covers the top of the spacer blocks and ledger and the other leg extends up the wall.
Cut a strip of metal flashing at least 6 inches wide and as long as the ledger. (If more than one strip of flashing is needed, overlap the ends by 3 inches and bed them in siliconized acrylic caulk.)
Fold the metal lengthwise to form a right angle. Apply it over the waterproof membrane.
Drive roofing nails through the flashing’s top edge every 8 inches.
Fasten concealed-flange double joist hangers at both ends of the ledger and flush with its bottom edge, using joist hanger nails.
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