Installing A New Chimney Crown - Building & Construction - DIY Chatroom Home Improvement Forum

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Old 09-10-2010, 07:26 AM   #1
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Installing a new chimney crown

My apologies if this isn't the right place for this question.

The crown on my chimney is crumbling away to nothing. Last night, I stopped at my local concrete place and picked up a precast crown. My plan is to install the new crown, tuck point the rest of the chimney (only about 3-4 feet sticks above my roof line), and then give the whole thing a good coating or two of a chimney waterproofer. My question regarding the install of the chimney crown is this. Should I lay a bed of mortar on the top run of bricks and set the crown on that or should I use some type of high temp silicon to fasten it to the top run of bricks? I currently have a 6" liner installed inside my clay flue and will also be using a pourable insulation around the liner at the same time I fix the crown.


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Old 09-10-2010, 08:27 AM   #2
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I would use the high temp silicon just to be sure. Doesn't concrete tend to crack in high temps?


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Old 09-12-2010, 08:32 PM   #3
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Decided to tackle the job this afternoon. Here is the old crown that I managed to pull off.

Here is the chimney minus the crown.

Here is the new crown mortared in place.

I also filled a couple small cracks in the mortar of the chimney, but it was in pretty good shape, so I didn't push it. Now I'll wait about two weeks and give it a few coats of a chimney water sealant. My perlite should be here in a few days, so I can get my liner insulated also.

The job is far from perfect, but it looks OK from the ground and will keep water out. What more do I really need?
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Old 09-12-2010, 09:54 PM   #4
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Good job!
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