Repair A Chimney Crown (Masonry Chimney Cap)

Watch how to replace your Chimney Crown or Chimney Cap.

[@jeffdeluca1153]

Excellent work! I have a question. I'm in PA climate area and my chimney looks like it was basically parged - that's gone. The flue liners look surprisingly good for 85 years old! But they only stick up about 2 1/2" above the top of the brick chimney. I would like to pour a nice concrete crown but would need to extend the flues??? Am I thinking this correctly? I'd like a good 3" - 4" crown, sloped of course. So do I just add approx. 6" to the flues? How much are they supposed to rise above the crown? And the mortar joint would be embedded in the new crown. What type mortar do I use to bond the flue sections? Please correct any of the above. Jeff

[@Austinroofingcontractors]

@@jeffdeluca1153 clay tiles are standard sizes for the most part. You should be able to find a matching flu liner or flu tile. It can then be cut to say 6 inches or whatever size you need we do that very often to be able to create a concrete crown. you typically just want to set it in place with masonry cement. There will be some movement masonry cement is soft so it allows a little bit of movement. All should be good.

[@marspierce.8267]

The cap should of been at least 4 inches thick,looks good though 4 inches is code in Milwaukee

[@taylorgordon2696]

Lead flashing is OP. It need to be able to expand and contract so you don’t use mortar

[@johns9543]

was just thinking That, i use lead mate

[@mrterryman]

excellent! Most contractors stop way short of this techniqe. (skipping on rebar, grids, mesh, overhangs, etc. The only other thing you can do is add a break with galvanized metal, and maybe a groove for a drip edge under the concrete overhang. Nice job.

[@joshjepkema1141]

We use a 30# tar paper so won't rust out.

[@gospelninja2.016]

How much cement to every bag of mortar roughly?

[@richardburchett]

Looks good. Would like to see what the form looked like up close. Also what kind of paint was used on the clay?

[@waysaunut]

Just wondered what the concrete mix is, Thanks

[@Austinroofingcontractors]

We use a combination of pre-mix and portland to upgrade to 7500 PSI - test concrete.

[@brikkijim]

Needs a little more overhang. A drip edge would of been nice for a little extra $

[@co3302]

do it all the same just don't do poured crowns