Best Through-the-Roof Wood Stove Chimney Kits
The best through-the-roof wood stove kit depends on your roof pitch, ceiling layout, and chimney brand. For an attic installation, AllFuel HST offers kits with flat-top or spark-guard caps and different support-box and flashing options. The DuraVent DuraPlus ceiling kit is a brand-specific choice for a vertical route. The pipe lengths needed to complete these kits are sold separately, so confirm the route and required components before buying.
| Kit | Best suited for | Key detail |
|---|---|---|
| AllFuel HST 11-inch box, spark guard | Sloped roofs | Flashing for 7/12–12/12 pitch |
| AllFuel HST 24-inch box, flat top | Lower-pitch roofs | Flashing for 1/12–6/12 pitch |
| AllFuel HST 11-inch box, flat top | Flat or lower-pitch roofs | Adjustable flashing |
| AllFuel HST 36-inch box, spark guard | Flat-roof installations | 36-inch support box |
| DuraVent DuraPlus ceiling kit | DuraPlus vertical systems | Supports up to 35 feet of pipe |
AllFuel HST 11-Inch Box With Spark Guard
Best for: A single-story installation through an attic with a roof pitch of 7/12 to 12/12. This AllFuel HST kit includes an 11-inch square ceiling support box, trim, attic insulation shield, storm collars, roof flashing, and a chimney cap with spark arrestor.
The support box can support up to 45 feet of chimney pipe. Choose this kit if the roof pitch falls within the specified range and you want the included spark-guard cap. It is limited to AllFuel HST Class-A double-wall chimney pipe; other brands’ Class-A pipe are not compatible. Pipe lengths are sold separately.
AllFuel HST 24-Inch Box For Lower-Pitch Roofs
Best for: Attic installations with a 1/12 to 6/12 roof pitch. Its included 24-inch ceiling support box, attic insulation shield, adjustable roof flashing, storm collars, and flat-top cap suit a supported vertical chimney route through the roof.
The kit’s support box is rated to support up to 45 feet of chimney pipe, which must be purchased separately. Choose this version when the 24-inch box and lower-pitch flashing match the installation. Like other AllFuel HST kits, it cannot be connected to other brands of Class-A chimney pipe.
AllFuel HST 11-Inch Box With Flat-Top Cap
Best for: A single-story attic route using an 11-inch square ceiling support box and roof flashing specified for a 1/12 to 6/12 pitch. The package includes a stove-pipe adapter, support box with trim, attic insulation shield, storm collars, adjustable flashing, and a flat-top chimney cap.
This is a useful alternative to the 24-inch-box version when the smaller support box is appropriate for the planned installation. The chimney pipe is not included, and the kit is compatible only with AllFuel HST Class-A double-wall pipe. Check the roof-pitch range and support-box dimensions before selecting it.
AllFuel HST 36-Inch Box For Flat Roofs
Best for: A flat-roof or attic installation where the selected configuration calls for a 36-inch square ceiling support box and flat-roof flashing. The package includes an attic insulation shield, storm collars, a stove-pipe adapter, and a chimney cap with spark arrestor.
The ceiling support box can support up to 45 feet of chimney pipe, sold separately. Choose it when the flat-roof flashing and larger support-box format suit the building. It is not a universal kit: it is designed for AllFuel HST Class-A double-wall pipe, not other brands.
DuraVent DuraPlus Basic Ceiling Kit
Best for: A vertical through-the-ceiling installation using 6-inch DuraPlus chimney pipe. The kit supports up to 35 feet of pipe and has durable 24-gauge construction. Choose it if you are building a DuraPlus system and need a ceiling-route kit rather than a through-the-wall setup.
The pipe is not included, and the product information does not list the included components in detail. Verify that this basic kit covers the support and roof parts required for your specific layout before purchasing. It is not identified as compatible with other chimney brands.
Buying Guide: How To Choose A Through-The-Roof Kit
Does your chimney route pass through an attic?
For a vertical route through a ceiling and attic, compare the support box, attic insulation shield, roof flashing, and cap included in each kit. The AllFuel HST attic options list these parts. DuraVent’s basic kit is described as a through-the-ceiling kit, so confirm its included components meet your installation needs.
Which roof pitch and support-box size do you need?
Match the flashing to the roof pitch: the listed AllFuel HST options cover 1/12–6/12, 7/12–12/12, or flat-roof layouts. Compare support-box sizes as well. A box dimension is a kit specification, not a substitute for checking the opening and installation requirements for your project.
Are the chimney pipes included?
No pipe lengths are included in the listed AllFuel HST attic kits, and DuraVent’s ceiling kit also excludes pipe. Plan the required chimney length separately, including the route from the stove connection through the ceiling, attic, and roof.
Can you mix chimney brands?
Do not assume that chimney components from different brands fit together. AllFuel HST explicitly states its kits cannot connect to other brands of Class-A chimney. Select components for one compatible system and follow the manufacturer’s installation instructions and applicable local requirements.
Frequently Asked Questions
What does a through-the-roof wood stove kit do?
It provides components for routing a chimney through a ceiling or attic and out through the roof. The included parts vary by kit, and chimney pipe may need to be purchased separately.
Which kit is for a steep roof?
The AllFuel HST 11-inch support-box kit with spark-guard cap lists flashing for roof pitches from 7/12 to 12/12.
Which AllFuel HST option is listed for a flat roof?
The 36-inch support-box kit specifies flat-roof flashing and includes a spark-guard cap.
Are these kits compatible with every 6-inch chimney?
No. AllFuel HST kits are specified for AllFuel HST Class-A double-wall chimney pipe and cannot connect to other brands’ Class-A chimney. DuraVent’s kit is specified for DuraPlus pipe.
Is chimney pipe included?
No. The listed AllFuel HST kits state that pipe lengths are sold separately, and the DuraVent kit supports pipe that is not included.