FireRock’s patented one-piece interlocking components make it easy to add an all-masonry chimney to your fireplace. Approved for indoor and outdoor fireplaces, these nesting blocks may be stacked as high as building code allows. Independently tested at 3,000 PSI compressive strength. To increase the chimney’s strength even more, insert rebar and mortar into the “hurricane” holes.
|Dimensions||22" (W) x 22" (L) x 6" (H) 15″ diameter flue|
4000 in stock
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