Material Properties
Comprehensive technical specifications for common countertop materials.
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Natural Stone
- Density: 165-185 lb/ft³
- Compressive: 19,000-28,000 psi
- Flexural: 1,200-1,500 psi
- Absorption: 0.2-0.4%
- Mohs Hardness: 6-7
- Thermal Expansion: 4-8×10⁻⁶/°F
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Engineered Quartz
- Resin Content: 7-10%
- Impact Resistance: 3.0-3.5 J/cm²
- Scratch Resistance: 7 Mohs
- Heat Resistance: 350°F
- Chemical Resistance: Class A
- UV Stability: ΔE <2.0
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Solid Surface
- Tensile Strength: 6,000 psi
- Elongation: 0.4-0.8%
- Gloss Retention: 85%
- Stain Resistance: 41/42
- Bacteria Growth: No growth
- Fire Rating: Class 1
Installation Standards
Critical specifications for professional installation:
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Support Requirements
- Overhang Limit: 6-12 inches
- Support Spacing: 24-36 inches
- Bracket Rating: 500 lb
- Seam Strength: 1,200 psi
- Level Tolerance: ±1/16"
- Edge Support: 100%
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Fabrication Specs
- Cut Tolerance: ±1/32"
- Edge Profile: 1/8"-3/4"
- Radius Minimum: 3/8"
- Polish Grade: 3000 grit
- Seam Width: 1/16" max
- Surface Flatness: 1/8"/10ft
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Environmental Factors
- Temperature Range: 32-140°F
- Humidity Range: 35-65%
- Expansion Gap: 1/8"
- Moisture Barrier: 10 mil
- VOC Emissions: <0.5 mg/m²
- Indoor Air: LEED v4.1
Performance Metrics
Key specifications for durability and maintenance:
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Durability Standards
- Impact: 144 in·lb
- Abrasion: 100-600 cycles
- Load Capacity: 150 lb/ft²
- Scratch Rating: 5H-7H
- Stain Resistance: Class 5
- Chemical Rating: Group 1-2
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Maintenance Requirements
- Sealing Interval: 1-5 years
- pH Range: 3-10
- Cleaning Products: pH 5-9
- Heat Exposure: 20 sec max
- Pressure Limit: 50 psi
- Life Expectancy: 15-50 years
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Safety Standards
- Food Safety: NSF/ANSI 51
- Slip Resistance: R9-R11
- Radon Emission: <4 pCi/L
- Lead Content: <0.1%
- Microbial: ISO 22196
- Fire Rating: Class A