Here’s a comprehensive guide for replacing the outside chimney connector band (also called a storm collar or flashing band) for your stove or chimney system:
Seals the gap between the chimney pipe and roof flashing
Prevents water/snow from entering the roof penetration
Secures insulation (for insulated chimneys)
Improves draft stability by reducing air leaks
Feature | What to Check |
---|---|
Diameter | Measure your chimney pipe's outer diameter (common: 6", 7", 8") |
Material | Stainless steel (best) or galvanized steel (budget option) |
Width | Standard bands are 4-6" wide (wider = better coverage) |
Clamp Type | Bolt-on (adjustable) vs. snap-on (fixed size) |
Local sheet metal shops can bend a custom stainless band (~30–80)
Remove Old Band:
Cut/unscrew the old band (watch for sharp edges).
Prep the Pipe:
Clean the pipe surface with a wire brush.
Install New Band:
Slide the band over the pipe.
Position it 1-2" above the flashing.
Tighten bolts or crimp edges securely.
Seal:
Apply high-temp silicone (e.g., Rutland 500°F) under the band’s lip.
✔ Stainless steel lasts longer than galvanized (especially in coastal areas).
✔ Slope the band downward slightly to shed water.
✔ Check annually for cracks or loose fittings.
Galvanized: 10–25
Stainless Steel: 20–50
Custom-Made: 30–80
Need help identifying your exact size?
Measure your chimney pipe’s outer diameter.
Note if your current band has bolts or crimps.
Share a photo of your roof penetration.
I’ll recommend the perfect band! 🔧
(Note: For double-wall pipes, ensure the band fits the outer wall’s diameter.)