Chimney liner install - top side question

[orenn89]

Hey guys, so finally ready to buy my liner and install my wood stove insert. I went up on my roof this weekend to see what i had to work with for my install and if the liner kit i am planning on purchasing will work out. Two questions resulted:
1) The top of the chimney is in worse shape than I thought (see pics). House was built in the 70s in new England so it has seen some winters to say the least. Does it look like something i should be worried about or is it fine?
2) I am going to go with the liner from fireside chimney supply, they seem to have great customer service, products and price (see link below). My chimney currently has two flues, one for the fireplace which i will be using for the liner, and one for the oil furnace. As you can see in the picture it already has a nice cap that covers both. If i use the chimney cap that comes with the liner, can i just cut the top part (cap part) off the piece that comes with the kit and let the liner stick up, but under the cap that is already on the chiminey? I can draw this out if you don't follow. This would be the easiest and cleanest solution i can come up with to keep the furnace part covered.

Chiminy liner i am going to get:
http://www.ebay.com/itm/6-x-25-Stainless-Flexible-Chimney-Liner-Insert-Kit-/260652575804

 

[Fastdonzi]

You'll need to do a Top Plate at least. But a Storm collar may be a good idea as well. I'll let the experts answer that

 

[Fastdonzi]

Oh, I see your kit has a Top Plate.... Good... You will want to insulate the tube as well...

 

[bholler]

Yeah the top of your chimney is going to need some work soon. How high it that cap? I think you may not have enough room between the top of your new liner and the under side of that cap. It could cause issues

 

[bholler]

And yes like donzi said insulation and i will add blockoff plate to the list

 

[orenn89]

Yes, planning on doing insulation wrap, block off plate, as well as stuffing roxul around top and bottom. It is an exterior 2 story chiminey, I measured i need a 23' liner. I was planning on using the top plate provided in the kit, just not using the cap the kit provides and using the existing cap that is already installed on my chiminey.

 

[orenn89]

What does a storm collar do for me in this installation?

 

[bholler]

What does a storm collar do for me in this installation?

There is no storm collar with that type of top setup.

I was planning on using the top plate provided in the kit, just not using the cap the kit provides and using the existing cap that is already installed on my chiminey.

I think your existing cap may be to low for it to work right

 

[orenn89]

There is no storm collar with that type of top setup.


I think your existing cap may be to low for it to work right

I am planning on cutting the part provided shown in the picture where the red line is. If this will not work, what would you suggest?

 

[bholler]

I dont think you would have to cut anything just don't use the cap. But i dont think there will be enough space between the top of that top collar and the under side of your existing cap it looks like your cap is a 10" high cap the clay sticks up 1.5" to 2" then your top plate is 5" to 6" that only leaves a couple inches of space there. That will most likely cause a problem. i would say you either need a taller multiflue cap or use the provided one.

 

[webby3650]

You need 4" from the top of the liner to the cap. It looks like you will be really pushing that. It will be best if you use the cap that's provided.

 

[bholler]

Yes and 4 is a minimum For a wood stove i like to give a distance equal to the diameter of the line. So 6" in your case. But yes 4 is the minimum

 

[orenn89]

Would you try to cut a hole in the cap that i have that will go around the cap that will come with the kit? Or should i also get a cap for the furnace flue and take off the chiminy cap that is currently up there?

 

[bholler]

If there is not enough room under the existing cap you will either need to get a taller multi flue cap or use the provided one and get another for the furnace. No i would not cut a hole in the cap that is there i see gas guys do that all the time and it looks rediculous

 

[orenn89]

Thanks guys, the wealth of knowlege on here never ceases to amaze me.

 

[KpR]

Tough to tell what the other sides of the chimney look like, but I think a good amount of tuck pointing is in order to sure up all the joints between the bricks. Looks like there might have already been an application of Crown Seal or the like on the crown--is that right? Maybe another coat is in order.
Have you had the setup inspected by a good sweep yet?
Good luck with the install.

 

[bholler]

Tough to tell what the other sides of the chimney look like, but I think a good amount of tuck pointing is in order to sure up all the joints between the bricks. Looks like there might have already been an application of Crown Seal or the like on the crown--is that right? Maybe another coat is in order.

Crown coat wont fix that it needs a crown and probably a few courses relaid