My chimney has 4 flues and used to have a multi-flue cap. It was hard to sweep, clogged with creosote very fast, and the upstairs two flues are very short, only 8ft or so. So... I'm in the process of converting the downstairs open fireplace to an insert and figure I'd swap out for individual flues instead and increase some draft. Problem is, the flues are very close together.
Looking for advice to complete this install safely and last a couple of years until I can properly rebuild the chimney higher and possibly go back to a cleaner looking lightweight multi-flue cap.
Main problem is the flues are so close together so I had to cut the lids a bit
Too late to put the old cap back on, that was a heavy mother****er
Flues (left to right)
Here's what I've done so far
TODO
All parts are Rock-Flex from Rockford Chimney Supply.
![[Hearth.com] In process of converting multi-flue chimney cap to individual, and liners - clearance issues / waterproofing](https://www.hearth.com/talk/data/attachments/299/299308-d23e5d56278bdbae84e52520df3f837a.jpg?hash=FcYnGbhKcz "[Hearth.com] In process of converting multi-flue chimney cap to individual, and liners - clearance issues / waterproofing")
![[Hearth.com] In process of converting multi-flue chimney cap to individual, and liners - clearance issues / waterproofing](https://www.hearth.com/talk/data/attachments/299/299309-01ba6aaddbdbe6874cd33b21b07372a3.jpg?hash=Gva5WZ_2bq "[Hearth.com] In process of converting multi-flue chimney cap to individual, and liners - clearance issues / waterproofing")
![[Hearth.com] In process of converting multi-flue chimney cap to individual, and liners - clearance issues / waterproofing](https://www.hearth.com/talk/data/attachments/299/299310-06e06cfeab00c05e90de35004c2f506a.jpg?hash=VtlXdGo_gU "[Hearth.com] In process of converting multi-flue chimney cap to individual, and liners - clearance issues / waterproofing")
![[Hearth.com] In process of converting multi-flue chimney cap to individual, and liners - clearance issues / waterproofing](https://www.hearth.com/talk/data/attachments/299/299311-a898de1557bcd4f4c9c1a5b9f8ab8eec.jpg?hash=XNDv-29cy_ "[Hearth.com] In process of converting multi-flue chimney cap to individual, and liners - clearance issues / waterproofing")
![[Hearth.com] In process of converting multi-flue chimney cap to individual, and liners - clearance issues / waterproofing](https://www.hearth.com/talk/data/attachments/299/299312-cd3e41da4a4bdadaa321dbe41cc5030c.jpg?hash=19ooibaB5w "[Hearth.com] In process of converting multi-flue chimney cap to individual, and liners - clearance issues / waterproofing")
Looking for advice to complete this install safely and last a couple of years until I can properly rebuild the chimney higher and possibly go back to a cleaner looking lightweight multi-flue cap.
Main problem is the flues are so close together so I had to cut the lids a bit
Too late to put the old cap back on, that was a heavy mother****er
Flues (left to right)
- Downstairs insert (will get lined and insulated) - straight connector
- Upstairs open fireplace (unlined) - cap has legs to secure
- Upstairs Morso wood stove (currently unlined - will get lined and insulated) - t-snout
- Downstairs BBQ/smoker (unlined) - cap has legs to secure
Here's what I've done so far
- Poured 50 pounds of Quikrete fast setting cement w/ acrylic bonder because it had no slope.
- Test fitted top covers and caps
TODO
- Seal Quikrete with Dryloc Extreme
- Cut out a drip groove
- Follow rockford instructions to install liner
- This work ok? Safe etc
- Best way to seal around flue tiles because I'll get more water with the cutouts in the lids. There weren't expansion joints
- It appears the flue extension has to be un-insulated? That's not very good is it?
All parts are Rock-Flex from Rockford Chimney Supply.
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