Replies

1. 
   ixsamson | Jan 15, 2018 02:20am | #1

   Bottom to Top. 

1. 
   user-2409187 | Feb 26, 2018 09:47am | #3

   depends on weight

   The veneer stones shown in this photo are realitively heavy vis a vis the mortar that holds them to the CMUs. In this case "bottom up" is the way to go, with minor shimming to hold stones in place until the mortar has set.

   
2. 
   mikeljon | Jan 15, 2018 06:40am | #2

   depends

   I did manufactured veneer exterior chimney once, and top to bottom was more convenient. Since the stones stuck without needing support beneath them, it was easier to work down and keep the faces clean. I just completed a 70 sq. foot fireplace with real stone veneer (1-1.5" granite from Stoneyard in MA--beautiful stuff!). I put it on with a dry stack appearance and just about everyone of the things needed to be trimmed--it took me a few hours a day for about 9 days. This worked a lot better to go bottom up. Some of the stones were heavy and it was helpful to have support under the stones right after they were set.