Chimney cap help

[clutch25]

I'm getting ready to install a chimney and need some thoughts...

1. Is this air gap at the top of the chimney/cap junction correct? The pipe is Simpson HT triple wall with the internal insulated then a air gap.

2. How in the HECK do I get this cap off!?!?!? I installed it to check for fit and for the life of me I can't get the thing off! I believe it just "snapped" in.

3. Anyone have any pictures of a square cathedral support box install? I can't seem to find any searching...

Thanks!

 

[webbie]

at first glance it appears to be the wrong cap......are you certain your chimney is that size and type (that is, Dura-Plus)?

They usually twist off - that is, twist and then lift. Those raised parts near the top of the pipe hold the cap.

 

[clutch25]

Unless the cap is labeled wrong it should be the correct on according to the catalog. Page 50 of the Duravent catalog shows it looking just like this one with the outer air gap collar. I agree with you though....all of the caps I have seen have been a twist lock settup.
I might have to pop those screws out and pull it off from the inside diameter....

 

[fossil]

Not sure what it is about a cathedral ceiling support box you want to see, but there's one installed for the Lopi in my house. Attached is not a great detail pic of the support box. Rick

 

[clutch25]

Thanks Fossil! Kind of looking for pics of the roofside installation prior to flashing install.

 

[fossil]

Thanks Fossil! Kind of looking for pics of the roofside installation prior to flashing install.

Can't help you there, I wasn't up there to see it happen. I don't do 7/12 tile roofs...regardless of the season. That's for younger folks. Rick

 

[begreen]

The cap looks like it got wedged. Have a helper hold the pipe firmly at the base. Then take a short 2x4 block and place it under the low edge of the cap. Then hammer tap on the wood block to nudge the cap free.

I'm kicking myself for not taking shots of when I put in the greenhouse cathedral box. We did it just like the installation manual shows except ours was a new roof so it was flanged over roofing paper.