thick door

Thank you for your question. If you have the older style flush type lock handle like the 82-008K they are only made for the 1" thick old style patio door. At one type door manufactures made a thicker "thermal break" type door, but customers are now going with the vinyl type patio doors. Take a look at the surface mounted lock the 82-005 along with the exterior handle with key 82-306. See if this could work on your patio door.