Chimney Extensions

Chimney Extensions Add Height for Safety and Draft

Chimney extensions add height to your fireplace chimney.
Height24 inches
Width32 inches
Depth32 inches
Weight1920 pounds
Delivery Size1 pallets

Create needed clearance with addition chimney sections for your fireplace. Available in 24″ sections up to 48″.

Skill: Intermediate
Project Duration: Half Day
Add chimney extensions in 24″ tall sections up to a max of 48″ extra height.

Information:

Some people want to add height to their fireplace kit for aesthetic reasons. Others need to add height for additional clearance over structures.

  • Fits all fireplace models
  • Add up to four feet of chimney
  • Improves draft- great for windy areas
  • Improves the look of your kit
  • Requires a concrete footing
Chimney Extensions
  • Chimney Extensions
  • Bremley TV outdoor fireplace with chimney extensions and wood boxes.
  • Outdoor fireplace with chimney extension through roof gable 2
  • Outdoor fireplace with chimney extension through roof gable

Add the Height Your Fireplace—and Your Space—Needs

Chimney Extensions increase the height of your fireplace to create additional clearance, improve draft, or bring the structure into better proportion with your home, pavilion, or surrounding architecture. In larger outdoor spaces, the added height can give the fireplace more presence and help it feel appropriately scaled rather than visually undersized.

Extensions are supplied in 24-inch sections, with up to 48 inches of additional chimney height available. Because the block courses allow the finished height to be adjusted in 4-inch increments, you can tailor the extension more precisely to the needs of your project.

Additional chimney height may also improve performance in windy or challenging locations by helping smoke rise and draft more effectively. Where nearby roofs, pergolas, or other structures affect the installation, extensions can provide the extra height needed to create appropriate clearance. Final placement and height should always follow the fireplace instructions and applicable local requirements.

Chimney Extensions work with every Cornerstone outdoor fireplace model and use the same coordinated materials and dry-stack construction system as the fireplace. Because the added masonry increases the weight and height of the completed structure, include the extension when planning the fireplace footing and overall installation.

Design your fireplace over 750 different ways!

Design Your Fireplace More Than 750 Ways

Every Cornerstone fireplace can be customized with different colors, chimney heights, wood storage, gas log options, and architectural additions such as Estate Wing Walls. By combining these choices, you can create more than 750 possible fireplace configurations.
Choose a single wing wall for an asymmetrical layout, add a matching pair for the full Estate look, or combine them with other fireplace upgrades to create a design that fits your patio, your home, and the way you plan to use the space.
Because the fireplaces and accessories are designed as one coordinated system, you can plan the finished project before ordering and build it without cutting or mortaring the blocks.

Bremley two-sided outdoor fireplace kit
Fireplace with attached grill station featuring a 32
Unity Z Minus hardscape kit positioned beside a firepace kit for expanded cooking
Configure Your Fireplace

Add Accessories When You Order Your Fireplace

Every fireplace accessory is compatible with every Cornerstone outdoor fireplace model and can be selected through the configurator when ordering your fireplace kit.

We recommend including all planned accessories with your original purchase so the complete project can be prepared together and the materials coordinated as closely as possible. Accessories requested later require a special order and will typically cost more because of separate preparation, handling, and shipping.

Add Chimney Extensions to Your Fireplace

Watch: Assembling a Stone Outdoor Fireplace in a Weekend

Build your fireplace in a weekend youtube video

Learn from the Pro – Check Out Our How-To Video Hub

You will learn what to expect when building this project yourself. All of Jake’s kits are perfect for installers or DIYers. You don’t need any special skills or tools. All the pieces you need are included in your kit. There is no cutting or mortaring the blocks. You simply stack and glue the block together.

Chimney Extensions

Chimney Extensions

Increase the height of your fireplace to better complement your home, pavilion, or surrounding architecture. Chimney extensions are supplied in 24-inch sections and can be adjusted in 4-inch increments, up to 48 inches of additional height.

Explore Chimney Extensions
Deluxe Wood Storage

Deluxe Wood Storage

Keep firewood close to the hearth while giving your fireplace a wider, more substantial built-in appearance. Add one wood storage box for an asymmetrical layout or a pair for a balanced fireplace design.

Explore Wood Storage Boxes
Estate Wing Walls

Estate Wing Walls

Extend your fireplace into the surrounding patio with coordinated seat walls and piers. Wing walls help define the gathering area, create additional seating, and provide convenient surfaces for drinks, plates, or décor.

Explore Estate Wing Walls
Gas Log Sets

Gas Log Sets

Convert your wood-burning fireplace for the convenience of gas. Enjoy a controlled flame without gathering, carrying, or storing firewood.

Explore Gas Log Sets

Dimensions for Chimney Extensions

Instructions, Dimensions & Planning Documents

Chimney Extension Instructions

All Fireplace Kits Dimensions
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