Essex County, New Jersey
Multi-Flue Chimney Crowns and Caps in Millburn, NJ
Millburn's median home value is above $1.3 million, and when a stack carries more than one flue, the crown and caps have more to do.
Millburn, in Essex County, is mostly detached, owner-occupied housing: about 79% detached and 81% owner-occupied. The median home was built in 1954, about 43% predate 1950, and the ACS median home value is about $1.4 million.
This page is about one structural situation: a chimney stack with more than one flue.
Not every house has one. If you can count more than one flue tile at the top of your chimney, the notes below apply.
What we look at
Why more flues means more to check
One crown, many openings
A single crown covers several flues, so a crack can affect more than one.
Caps for each flue
Each flue needs its own cap, or a properly sized shared cover.
Flue tile and crown
Each flue tile should be able to move on its own as it heats and cools, so the joint where it meets the crown is a point to examine.
Different fuels
One flue may serve a fireplace and another a boiler. They are inspected for different things.
Learn
Multi-flue crowns and caps
A crown has to shed water away from every flue that rises through it. A crown that has no proper slope, or one made by simply packing cement around the tiles, can hold water and crack. A well-formed crown slopes away from the flues and overhangs the brick below.
Caps keep rain, debris and animals out. On a multi-flue stack, either each flue gets a cap sized to it, or a single cover spans the group. Mismatched or missing caps are among the more common findings. See the chimney caps page for options, and cracked chimney crowns for what separates a cosmetic crack from a real one. We completed crown and cap work on a job in North Brunswick Township.
Checklist
If your chimney has more than one flue
- Count the flue tops and compare them with the appliances inside.
- Confirm each flue has a cap.
- Look for cracks around the base of each flue tile.
- Ask which flues are in use and whether the unused ones are capped.
- Have a full inspection before adding any new appliance.
Symptoms
| Symptom | Possible cause | Next step |
|---|---|---|
| Cracks radiating from flue tiles | Crown cracking at the flue edge | Crown repair |
| A flue with no cap | Missing or damaged cap | New cap |
| Rust streaks from caps | Cap corrosion | Cap replacement |
| Water inside one fireplace only | Cap or flue failure on that flue | Check that flue |
Housing profile
What the housing mix means in Millburn
Most Millburn homes are detached and owner-occupied, and many date from the mid-century or earlier. Where a house has a stack with more than one flue, each flue adds a crown or cap detail to check, which is the subject of this page.
Questions
Frequently asked questions
Can one cap cover two flues?
A single cover may span several, but it has to be sized correctly and not restrict draft. We look at each stack individually.
Is a taller chimney harder to inspect?
It takes more care and may need roof access. We tell you what we can see.
Do I need a crown rebuild?
Not always. Small cracks can be sealed. We tell you which applies.
Service areas
Other areas we serve
Chimney Academy
Guides that go with this page
Questions about your chimney in Millburn?
Call us, or send a scheduling request. We will contact you to confirm. Your appointment is not confirmed until we do.