Product Overview
Engineered quartz window sills are prefabricated from a blend of 90-93% natural quartz aggregates and high-grade polymer resins, cured under vibration and vacuum-compression. Designed for interior architectural detailing, these sills provide a non-porous, structurally uniform alternative to natural marble or granite.
They serve as a durable transition element between window frames and interior walls, offering high resistance to moisture intrusion, condensation pooling, and heavy impact in high-traffic commercial and residential installations.
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Technical Specifications
|
Parameter |
Specification Standard |
Test Method / Notes |
|
Material Composition |
93% natural quartz crystal, 7% unsaturated polyester resin & pigments |
Spectrophotometric analysis |
|
Standard Lengths |
36", 48", 60", 72", 96" (Custom lengths up to 120" available) |
CNC cut-to-size capability |
|
Standard Widths |
4", 6", 8", 10", 12" (Custom widths available) |
Tolerance: +/- 0.5 mm |
|
Thickness Options |
15 mm, 20 mm, 30 mm |
Tolerance: +/- 0.3 mm |
|
Water Absorption |
<= 0.02% |
ASTM C97 |
|
Mohs Hardness |
Grade 7 |
EN 101 |
|
Flexural Strength |
>= 45 MPa |
ASTM C880 |
|
Density |
2.35 - 2.40 g/cm3 |
ASTM C97 |
|
Fire Retardancy |
Class A / Flame Spread Index <= 25 |
ASTM E84 |
Key Product Features
Zero Porosity: Impervious to water, condensation, and common cleaning agents, eliminating internal mold growth and staining without requiring periodic chemical sealants.
Dimensional Precision: Calibrated on 5-axis CNC bridge saws, maintaining a diagonal tolerance within +/- 0.8 mm to ensure rapid, seamless alignment during on-site installation.
Edge Profile Versatility: Fabricated with standardized or custom edge treatments, including Eased, Bullnose, Bevel, Ogee, and Mitered apron returns.
Consistent Batch Coloration: Automated color-batch dosing systems maintain stable pigmentation across large-scale commercial orders, eliminating shade variations between rooms or floors.
Color Series
Solid Series: Pure White, Absolute Black, Cement Grey (uniform grain distribution).
Calacatta & Carrara Veined Series: Directional, multi-pass inkjet or physical mineral vein integration mimicking natural marble.
Fine-Grain Sparkle Series: Fine quartz crystal infusion with micro-mirror flecks for high-light reflectivity.
Surface Finishes
Polished: Gloss level >= 50 gloss units; smooth, reflective surface optimized for easy cleaning.
Honed: Matte finish (gloss level 10 - 20); low light reflection, fingerprint-resistant.
Leathered / Brushed: Textured tactile finish achieved via diamond brush heads, accentuating the quartz mineral structure.
Applications
Multi-Family Residential
High-rise apartment complexes requiring uniform, low-maintenance interior window trims.
Hospitality & Hotels
Guest room and lobby window framing subjected to heavy cleaning schedules and moisture exposure.
Commercial Office Buildings
Durable corporate interior build-outs requiring strict adherence to architectural specifications.
Healthcare & Education
Facilities demanding non-porous surfaces that inhibit bacterial proliferation and withstand harsh institutional disinfectants.
OEM & ODM Customization
Shop Drawing Engineering
In-house CAD/CAM team reviews architectural blueprints and generates shop drawings for client sign-off prior to production.
Custom Profiling
Capability to execute non-standard drip edges, radius corners, notch cuts for drywall returns, and pre-drilled anchorage slots.
Private Label Packaging
Customized carton labeling, barcode printing, and laser-etched project reference numbers on the bottom edge of each sill.
Raw Material Batching -> Vacuum Vibro-Compression Pressing -> Thermal Curing Oven -> Calibrated Calibration & Polishing -> 5-Axis CNC Cutting -> QC Dimensional Audit -> Fumigated Wooden Crating
Compression Molding: Processed under 60-ton hydraulic pressure combined with high-frequency vacuum vibration to eliminate internal micro-voids.
Thermal Curing: Cured in a temperature-controlled thermal tunnel at 90C for 45 minutes to achieve complete resin polymerization and dimensional stability.
Inspection Protocol: Every individual sill undergoes a 3-point flatness check using laser surface gauges, manual caliper measurement of thickness tolerances, and visual inspection under 1000-lumen LED lighting for surface inclusions or micro-chips.
Packaging & Documentation
Export-Grade Packaging
Individual Protection: Foam interleaving sheets between finished surfaces to prevent abrasion during transit.
Crate Construction: ISPM 15-compliant heat-treated fumigated solid wood crates reinforced with steel strapping and internal shock-absorbing corner guards.
Pallet Configuration: Max load capacity per crate restricted to 1.2 metric tons to allow safe forklift handling and container floor loading.
Documentation Provided
Material Safety Data Sheet (MSDS)
Technical Data Sheet (TDS)
Certificate of Analysis (CoA) per production batch
Packing list and commercial invoice matching Bill of Lading specifications
FAQ
Q: What is the standard lead time for bulk container orders?
A: Standard production takes 15 to 25 days following shop drawing approval and receipt of deposit, depending on order volume and custom profile complexity.
Q: Are samples available for laboratory testing or client presentations?
A: Yes. 4" x 4" material sample kits representing standard color lines and edge profiles are available upon request. Freight charges apply unless shipped via buyer's courier account.
Q: How are cut-to-size orders managed to prevent installation errors on site?
A: All pieces are labeled according to client-provided room schedules and floor plans. A corresponding layout map is included in the shipping crate.
Q: Can these quartz sills be installed in exterior applications exposed to direct sunlight?
A: No. Standard interior-grade unsaturated polyester resin quartz sills may experience resin degradation or discoloration when exposed to continuous direct ultraviolet (UV) radiation outdoors.
As one of the leading quartz window sills manufacturers in China, we warmly welcome you to buy high quality quartz window sills at competitive price from our factory. For customized service, contact us now.
