[cibula11]

Looking to wrap my exterior chimney chase with a antique thin brick (1/2" thick). What is the best type of substrate to use? The current structure has steel siding, and I'd rather not have to replace the cap/venting/etc....so depth needs to be considered.

Can I use 1/4" cement board or would it be better to wrap plywood in tar paper and metal lath and do a scratch coat? Other?

 

[Tscarborough]

In Des Moines, you woud be better served with 2 layers of paper and then lath/scratchcoat.

 

[jomama45]

On small areas like chimneys, I like to use a good Ice&Water barrier below, as it self heals around all of the penetrations, and the cost is minimal. Either that, or an all out drainage plane product underneath, but that's even more expensive, and adds a little more depth,

I like the lath method as well, the only issue is that it has to be much flatter for thin brick than is does for stone, etc... A first-timer might struggle getting the plaster coat flat enough for thin brick...........

 

[cibula11]

Could I wrap in ice and water and use hardie board or something similar? Is it drainage that becomes an issue with cement board vs. lath/scratch?

 

[cibula11]

Could I wrap in ice and water and use cement board or something similar? Is it drainage that becomes an issue with cement board vs. lath/scratch?

after checking around online it looks like perma base or Durock approves use for exterior. 2 layers of felt paper ( or Ice/water I suppose) liquid water proofer then thin set and brick. Any problems foreseen with this method?

 

[cibula11]

Outside of the cement board question, is there any special flashing needed for thin brick, as far as at the roof/shingle and brick wall transition? Do I need a weep screed flashing or does thin brick not need anything other than step flashing/wall flashing.