A Strong, Patented Design
Chimney blocks are one-piece interlocking components that make it easy to add an all-masonry chimney to your indoor or outdoor fireplace. These nesting chimney blocks can be stacked as high as building code allows, and have been independently tested at a compressive strength of 3,000 PSI. To further increase the strength of our chimneys, rebar and mortar can be placed into the “hurricane” holes.
Product Specifications
- Dimensions: 22” (W) x 22” (L) x 6” (H)
- Flue: 15” diameter
- Weight: 75lbs
- 0” Clearance
- 1” clearance required above an offset
- UL 127-compliant
- Use with FireRock’s brick flange to add brick, stone, or stucco veneer above the roofline
- 1 bag of FireRock mortar is needed for every 6 masonry chimney blocks
*Please consult local building codes for specifics regarding any masonry fireplace application