Description
The 72x22 corner hearth template is engineered for large-scale fireplace installations in great rooms, commercial lobbies, and luxury residential applications where generous proportions create dramatic architectural impact. This premium-sized L-shaped hearth accommodates oversized fireplace openings, masonry heaters, and custom firebox configurations that require extended non-combustible protection zones. The 72-inch width dimension provides coverage for fireplace openings up to 48 inches wide while maintaining proper side clearances as specified in building codes. This professional fabrication template delivers the precision required for high-end architectural stonework where tolerances matter and installation perfection is non-negotiable. The 22-inch depth dimension exceeds all standard building code requirements for hearth extension, providing enhanced safety margin for wood-burning applications while creating a substantial visual platform that anchors large-scale fireplace designs. The L-shaped corner configuration maximizes spatial efficiency in corner installations while the generous dimensions prevent the hearth from appearing undersized relative to substantial fireplace surrounds and mantels common in luxury construction.
Dimensions
- Overall Width
- 72"
- Overall Depth
- 22"
Specifications
- Downloads
- 0
Related Templates
The 72x22 corner hearth template is engineered for large-scale fireplace installations in great rooms, commercial lobbies, and luxury residential applications where generous proportions create dramatic architectural impact. This premium-sized L-shaped hearth accommodates oversized fireplace openings, masonry heaters, and custom firebox configurations that require extended non-combustible protection zones. The 72-inch width dimension provides coverage for fireplace openings up to 48 inches wide while maintaining proper side clearances as specified in building codes. This professional fabrication template delivers the precision required for high-end architectural stonework where tolerances matter and installation perfection is non-negotiable. The 22-inch depth dimension exceeds all standard building code requirements for hearth extension, providing enhanced safety margin for wood-burning applications while creating a substantial visual platform that anchors large-scale fireplace designs. The L-shaped corner configuration maximizes spatial efficiency in corner installations while the generous dimensions prevent the hearth from appearing undersized relative to substantial fireplace surrounds and mantels common in luxury construction.
Installation Overview
Installation of a 72x22 corner hearth requires comprehensive structural planning due to the substantial weight involved鈥攁 3cm granite slab of this size weighs approximately 320-380 pounds depending on material density. Prior to installation, verify that the floor structure beneath the hearth location is adequately reinforced to carry this concentrated load. For wood-framed construction, this typically requires doubled or tripled joists beneath the hearth footprint, extending at least 24 inches beyond the hearth perimeter in all directions. The installation process begins with precise layout of the corner configuration, using laser levels to establish level reference points on both perpendicular walls. Create a full-scale template using cardboard or rigid insulation board to verify fit before committing to stone cutting. The hearth support substrate鈥攚hether poured concrete, masonry corbelling, or steel angle frame鈥攎ust be absolutely level and capable of supporting the full weight without deflection. Any flex in the support structure will telegraph stress into the stone slab, creating crack potential at the vulnerable corner junction. Set the hearth on a bed of high-strength, heat-resistant mortar or construction adhesive, ensuring full contact across the entire bottom surface to distribute weight evenly and prevent point loading that could cause fracture.
CNC Cutting Notes
CNC fabrication of this large-format corner hearth demands careful attention to material handling and machine setup to achieve professional results. Before cutting, verify that your CNC table is perfectly level and that all support rails are clean and properly adjusted鈥攁ny twist or sag in the slab during cutting will introduce dimensional errors that appear as gaps during installation. Use at least six support points beneath the slab, positioned to prevent deflection without interfering with tool paths. Program your corner miter cuts with particular precision, as the 72-inch dimension magnifies any angular error. A deviation of just 0.2 degrees in the miter angle creates a gap of approximately 1/8 inch at the far end of a 72-inch run鈥攗nacceptable for high-end installations. Use a high-quality diamond blade with minimal wobble, and program a two-pass cutting strategy for the miter surfaces: a roughing pass leaving 1.5mm material, followed by a finish pass at reduced feed rate for superior surface quality. When cutting the outside perimeter, maintain consistent feed rate through corners to prevent acceleration marks that require additional hand-finishing. For materials with pronounced veining like marble or exotic granites, orient the slab to create symmetrical or complementary vein patterns across both legs of the L-shape before cutting.
Material Compatibility
This large-format corner hearth template performs optimally with structurally stable materials that can span the 72-inch and 22-inch dimensions without requiring intermediate support. Granite, with its superior tensile strength and thermal stability, is the ideal choice for this application, particularly for wood-burning fireplace installations. Dense granite varieties with minimal veining鈥攕uch as Absolute Black, Steel Grey, or jet-misted granite鈥攑rovide maximum structural integrity and minimize visual discontinuity across large expanses. Quartzite offers an excellent alternative for upscale installations, combining the aesthetic appeal of marble with structural performance closer to granite. Engineered quartz can be specified for gas or electric fireplace applications where heat exposure remains minimal, though confirm that your quartz manufacturer approves their product for fireplace hearth applications. Avoid marble for wood-burning installations as the thermal expansion differential can cause warping in large-format pieces, though marble works beautifully for gas fireplaces or purely decorative installations where heat exposure is negligible. Due to the substantial weight of this hearth size, verify that your selected material is available in slabs large enough to cut both legs of the L-shape from a single piece, ensuring perfect color and pattern continuity across the entire hearth.
Where to Buy
This professional 72x22 corner hearth template is available as a free download from Slabwise's extensive architectural template collection. The DXF file is production-ready for immediate use with all CNC stone fabrication equipment and compatible with major CAM software packages. No registration, subscription, or licensing fees apply to this template, providing fabrication shops with immediate access to precision toolpaths for custom hearth projects. The file includes full-scale geometry optimized for CNC cutting with proper lead-ins, lead-outs, and corner handling to minimize hand-finishing requirements.