Engineered for extreme structural loads, weather protection, and sub-grade moisture resistance. Fully customizable under OEM/ODM private-label programs for global contractors, distributors, and architectural buyers.
Basement fenestration presents unique architectural challenges. Located at or below grade level, basement storm windows must simultaneously resist soil moisture, surface runoff hydro-pressure, extreme differential thermal stresses, and mechanical intrusion loads, all while fulfilling stringent municipal emergency egress codes.
Unlike standard elevation casements, sub-grade storm windows face elevated static pressures and lateral soil forces. Our OEM manufacturing utilizes high-tensile 6063-T6 aluminum alloy extrusions with a minimum wall thickness of 1.8mm to 2.2mm. Frame profiles are reinforced with corner-crimped cleats and structural epoxy to eliminate frame racking under cyclic loading exceeding 3,000 Pa (DP60+ structural pressure rating under ASTM E330).
Basement walls act as water accumulation zones during storm surges. Our ODM storm window frames integrate pressure-equalized weep drainage systems with anti-backflow silicone valves. Water ingress resistance reaches 720 Pa under laboratory testing per ASTM E331. Triple EPDM (Ethylene Propylene Diene Monomer) gasket seals ensure continuous airtightness (<0.05 cfm/ft² per ASTM E283) preventing ambient humidity migration into basement living spaces.
For finished basements with habitable rooms, storm windows must function as emergency escape routes. Our custom engineering strictly adheres to International Residential Code (IRC Section R310). We manufacture sliding, casement, and hopper-style storm window units that achieve a minimum clear net opening width of 20 inches, a clear opening height of 24 inches, and a total minimum net clear opening area of 5.7 sq. ft. with low-force single-operation release latches.
| Performance Parameter | Test Standard | Wincraft Factory Benchmark | Architectural Impact & Benefit |
|---|---|---|---|
| Structural Wind Load | ASTM E330 / AAMA 101 | DP55 – DP80 (3,600 Pa Design Pressure) | Resists wind force shear in high-velocity storm zones & heavy sub-grade hydrostatic pressure. |
| Thermal Transmittance (U-Factor) | NFRC 100 / ISO 10077 | 0.18 – 0.24 BTU/h·ft²·°F (1.02 – 1.36 W/m²K) | PA66-GF25 polyamide thermal breaks prevent frost formation and heat loss in cold basement wells. |
| Acoustic Insulation (STC/OITC) | ASTM E90 / ASTM E1425 | STC 38 – 44 dB | Dampens exterior traffic noise, lawn equipment, and severe weather impacts for quiet basement living. |
| Air Infiltration Rating | ASTM E283 | < 0.04 cfm/ft² at 1.57 psf (75 Pa) | Prevents cold drafts, moisture accumulation, airborne dust, and sub-grade soil gas infiltration. |
| Water Penetration Resistance | ASTM E331 / AAMA 501.1 | 720 Pa (15.0 psf) zero-penetration threshold | Prevents basement flooding and mold growth during torrential rain storms and soil water saturation. |
From custom extrusion die development to specialized glass build-ups, our manufacturing workflow provides complete architectural flexibility for OEM brand owners and project contractors.
We produce custom extrusion profile sections tailored to regional wall thickness requirements. Buyers can specify 6063-T5, 6063-T6, or 6061-T6 structural grade aluminum. Die tooling modification lead times are completed in 10 to 14 days, allowing rapid prototyping of proprietary multi-chamber frame profiles.
Basement storm windows demand superior surface protection due to ground humidity and salt exposure. We offer AAMA 2605 certified Fluoropolymer (PVDF) coating (20-year warranty), AAMA 2604 super-durable powder coating, and 25-micron anodic oxidation (Class I) resistant to chemical corrosion and UV degradation.
Factory glazing choices include double-pane insulating glass units (IGUs), triple-pane argon-filled units, and SentryGlas® laminated hurricane impact glass. Low-E coatings (Soft-Coat Low-E 270/366) are applied to control solar heat gain (SHGC < 0.25) and maximize condensation resistance (CRF > 70).
Basement windows are prime target entry points for burglary. We integrate concealed multi-point mushroom-head locking gear (German Siegenia / ROTO or custom OEM hardware) with anti-pry security hinges. Windows achieve WK2/RC2 intruder resistance standards under EN 1627.
Stay ahead of global building regulations and market demand shifts. Key technological trends driving procurement strategies for internationalfenestration buyers through 2030.
Global architectural specifications increasingly require Environmental Product Declarations (EPDs). Future procurement prioritizes suppliers utilizing hydro-electric smelted primary aluminum billets or post-consumer recycled aluminum with a carbon footprint under 4.0 kg CO2/kg Al.
Basements require continuous moisture control to prevent radon gas buildup and humidity stagnation. Modern storm window systems are incorporating concealed motorized chain actuators connected to smart home automation, automatically venting based on real-time VOC, CO2, and humidity readings.
Due to severe climate events, buyers are moving toward dual-function window frames. Next-generation storm windows combine impact-resistant security glazing with removable perimeter flood dam channels, allowing homeowners to seal window wells prior to predicted flash flooding.
Changsha Wincraft Aluminum Window Tech Co., Ltd. is a premier Chinese manufacturer and exporter specializing in custom aluminum doors, windows, sunrooms, and garden pavilions for architectural project importers and distributors across 80+ countries.
From initial design concept and architectural review to shop drawing sign-off, factory extrusion, assembly, quality testing, and sea-freight packaging, one dedicated engineering project team manages your order. This eliminates cross-departmental errors and ensures your technical specifications remain 100% consistent from drawing approval to final installation.
Every custom order undergoes 100% quality checking: 1) Aluminum billet chemical spectrometry, 2) Thermal break strip shear tension testing, 3) Coating thickness measurement, 4) Air and water pressure test chamber verification, 5) Hardware operational alignment check, and 6) Export-grade plywood crate protective packaging.
Direct technical and commercial answers for window importers, OEM brand owners, building contractors, and structural engineers.
Yes, absolutely. We specialize in complete OEM/ODM production. This includes extrusion profile design, private-label branding, custom powder coating color matching (RAL spectrum), custom glass specs, customized protective film, and specialized cardboard/wooden export packaging built around your market requirements.
Standard customized orders are manufactured within 4 weeks (approximately 25 to 30 calendar days) after shop drawings and order deposits are confirmed. For large multi-building project orders, we establish batch delivery schedules coordinated with your job site construction timeline.
Yes. Our in-house fenestration engineering team collaborates directly with architects and procurement managers. We deliver initial 2D CAD elevations, 3D renderings, and structural cross-section shop drawings within 24 hours of receiving your architectural blueprints or window schedule.
Our basement storm window profiles integrate multi-level pressure equalized drainage chambers, continuous EPDM corner-molded gaskets, and hidden weep holes with back-pressure check valves. When installed with proper exterior perimeter sealant and sub-grade membrane flashing, our frames prevent water migration even under heavy water submersion testing (720 Pa per ASTM E331).
Yes. We manufacture specific egress-compliant basement casement and sliding storm window units engineered to meet IRC Section R310. These units feature clear opening widths ≥ 20 inches, clear opening heights ≥ 24 inches, and net clear opening areas ≥ 5.7 square feet (5.0 sq. ft. for grade-floor units), equipped with intuitive, low-force single-action release handles.
For cold regions (e.g., Northern US, Canada, Northern Europe), we offer multi-chamber polyamide thermal break extrusions (PA66-GF25, 24mm to 34mm break width) combined with triple-glazed units, argon gas fill, and warm-edge Technoform spacers. This setup achieves ultra-low U-factors down to 0.18 BTU/h·ft²·°F (1.02 W/m²K), preventing glass condensation and frost buildup in basement wells.
All finished units are wrapped in protective scratch-resistant film, edge-protected with heavy-duty foam corner guards, sealed in moisture-proof shrink wrap, and packed inside fully enclosed fumigated plywood wooden crates or steel-reinforced A-frame glass racks. This ensures zero damage during multi-modal sea freight and container handling.
For standard aluminum profiles in stock colors (White, Black, Dark Bronze, Anthracite Grey), our MOQ is flexible (starting from 50 square meters for sample projects). For custom aluminum extrusion die creation or specialized custom RAL color powder coating, the baseline order volume is generally 300 square meters or one 20-foot container equivalent.
We back our manufacturing with a comprehensive warranty package: 10 years on aluminum structural frame integrity, 10 to 20 years on surface finishes (depending on AAMA 2604 or AAMA 2605 coating specs), 10 years on insulated glass seal failure, and 5 years on multi-point hardware components.
Simply click the contact button below or email your architectural drawings, window schedules, or performance specs to our engineering office at [email protected]. Our technical sales engineers will analyze your project and provide a complete quotation and DFM assessment within 24 hours.
Partner with Changsha Wincraft Aluminum Window Tech Co., Ltd. for direct factory pricing, 24-hour drawing turnaround, and certified high-performance basement storm window systems.