Stainless steel chimney crown cover

[Chimchimery]

That would mean two flue's in a new crown.?

 

[bholler]

That would mean two flue's in a new crown.?

Yeah you just cut a hole in it and seal the top plate down to the stainless. No big deal

 

[Chimchimery]

Update. With my measurements in-hand, I called Rockford Chimney Supply.

Of course, my chimney is not a square rectangle.

Width Left Side: 28-1/2"
Width Right Side: 29-5/8"

Length Front Side: 71-1/8"
Length Back Side: 70-3/8"

Distance from top of crown to top of first brick edge is 2.5"

--Rockford can make my chase according to these specific specifications above if I get two diagonal measurements. Additional cost I believe. Otherwise they would go off the largest measurements of the length and width.

IE. 1-1/8 gap Width and 3/4" Length.

So trying to decide if the gap based on these original measurements is good enough or (too much) or go for the more exact fit.

--Rockford says to add 1/4" to the length and width measurements.

--Rockford suggests going with 22 gauge stainless steel vs. the 24 gauge due to the long length.

--Rockford suggests adding 1" to the crown measurement and screw into the vertical mortar joint on the first row of bricks. Keeps the skirt from looking to long. I would order the drip edge as well so that would add 1/2 to the length (but the part you cannot screw into).

--Rockford suggested to screw in the tapcons enough so the steel isn't pulled into any gap. Said some people use a type of foam product to seal any gap so bugs and such do not go up the chase and down the flue.

As they say, "a penny for your thoughts on these specific points?"