Not sure what chimney components you need? You're in the right place.
Whether you're installing a wood stove, fireplace, furnace, or other solid-fuel appliance, this guide will walk you through the key decisions required to build a safe, code-compliant chimney system. Follow the steps below to determine your installation type, flashing requirements, support needs, and how much chimney pipe you'll need to complete your project.
Step One: How Is Your Chimney Leaving the Building?
The first step is determining your installation type.
Most chimney systems are installed either through the ceiling and roof or through an exterior wall. Your installation method determines which components you'll need and how the rest of your chimney system will be configured.
Through-the-Wall Installation
A through-the-wall installation is used when the chimney exits horizontally through an exterior wall before turning upward along the outside of the building.
For a standard installation, you will need:
- Thru-The-Wall KitFinishing CollarWall ThimbleTee with CapTee SupportTwo Adjustable Wall BracketsChimney CapInitial Chimney Pipe Section
In addition, you will also need:
- Additional Chimney Pipe Sections (amount determined in Step Three)
The final amount of chimney pipe required will depend on your installation height and the 3-2-10 Rule.
Through-the-Ceiling Installation
A through-the-ceiling installation is used when the chimney travels vertically through the ceiling, attic, and roof.
For a standard installation, you will need:
- Thru-The-Ceiling KitSupport BoxAttic Insulation ShieldStorm CollarChimney Cap
In addition, you will also need:
- Chimney Pipe Sections
- The Correct Roof Flashing
- A Firestop Radiation Shield for each additional floor penetration beyond the first ceiling level
The final amount of chimney pipe required will depend on your installation height and the 3-2-10 Rule.
Most installations require additional chimney pipe sections beyond what is included in the base kit.
Step Two: What Roof Flashing Do You Need?
Choosing the correct flashing is critical for a watertight installation.
Roof flashing is selected based on your roof pitch. Using the proper flashing helps prevent leaks and ensures your chimney system remains protected from the elements for years to come.
WHAT ROOF FLASHING DO YOU NEED?
Choosing the correct roof flashing is critical for creating a watertight chimney installation.
Roof flashing is selected based on your roof pitch. Using the proper flashing helps prevent leaks and protects your chimney system from rain, snow, and other weather conditions.
For your installation, choose the flashing that matches your roof:
• Ventilated Roof Flashing - Flat Roof (0/12 Pitch)
• Ventilated Roof Flashing for 0/12 to 6/12 Pitch
• Ventilated Roof Flashing for 12/12 Pitch (Steep Slope)
Not sure which flashing you need? Use the roof pitch guide to identify the best option for your installation.
Step Three: Do You Need an Extended Roof Bracket?
Some installations require additional support above the roofline.
Extended Roof Brackets help stabilize taller chimney systems exposed to wind and weather. Use this section to determine whether your installation would benefit from additional structural support.
DO YOU NEED AN EXTENDED ROOF BRACKET?
Some chimney systems require additional support above the roofline.
Extended Roof Brackets help stabilize taller chimney systems and provide additional resistance against wind and weather. They are commonly used when a chimney extends a significant distance above the roof.
As a general guideline:
• Less than 5 feet above the roof: No Extended Roof Bracket Needed
• 5 to 10 feet above the roof: 1 Extended Roof Bracket Recommended
• More than 10 feet above the roof: 2 Extended Roof Brackets Recommended
Use the diagram to determine whether additional support may be required for your chimney system.
Step Four: How Much Chimney Pipe Do You Need?
Proper chimney height is essential for performance and safety.
The total amount of chimney pipe required depends on your installation type, roof height, and code requirements. This step will help you estimate the amount of pipe needed to complete your system.
HOW MUCH CHIMNEY PIPE DO YOU NEED?
Proper chimney height is essential for both performance and safety.
The total amount of chimney pipe required depends on your installation type, roof height, and chimney termination requirements. Measuring correctly helps ensure proper draft and compliance with installation guidelines.
To estimate the amount of chimney pipe needed:
• Through-the-Ceiling Installations: Measure from the top of the Support Box to the top of the Chimney Cap.
• Through-the-Wall Installations: Measure from the Tee connection to the top of the Chimney Cap.
Remember that all chimney systems must also meet the 3-2-10 Rule, which may require additional chimney height above the roof.
Use the measurement guide to estimate the total amount of chimney pipe required for your installation.