Top China Aluminum Storm Windows Manufacturers & Factories

Compliance verification requires independent testing through accredited laboratories (such as Intertek, CSA Group, or UL). Top-tier factories like DERCHI perform initial cyclical mock-up tests within our internal computerized chamber (air infiltration, water penetration up to 15 PSF, and structural uniform load testing). Official compliance documentation includes certified NFRC U-factor and SHGC test matrices, CSA A440 certifications, and Florida Product Approval or Miami-Dade Notice of Acceptance (NOA) for hurricane impact resistance using SGP/PVB laminated glass makeups.

Yes. All DERCHI export orders are custom engineered from architectural floor plans and opening schedules. Our engineering department develops shop drawings configured directly in imperial units (feet, inches, and 1/16" increments), factoring in appropriate perimeter expansion allowances, nail-fin or masonry anchor setbacks, and regional building envelope flashings. Prior to cutting extrusions, our clients receive full CAD/Revit shop drawings with explicit joinery cross-sections for sign-off.

Trans-oceanic shipping exposes freight to extreme humidity, temperature shifts, and container vibration. Units are initially wrapped in electrostatic protective film (PE film ≥60 μm) covering all aluminum surfaces. Corner guards made of high-density polyethylene protect sash joints. Double- and triple-glazed units utilize continuous secondary polyisobutylene and silicone seals with molecular sieve desiccant inside the spacer bar to prevent internal condensation. Products are packed inside fumigated plywood solid crates (IPPC ISPM 15 compliant) featuring high-density EPE foam separation pads and desiccant packs, secured with steel banding to prevent dynamic shifting in container transit.

Standard lead time for custom thermally broken storm windows spans 25 to 35 calendar days following formal shop drawing approval and deposit receipt. For complex projects requiring custom architectural extrusion dies or special powder-coat formulations (e.g., custom Tiger Drylac colors), an additional 10 to 15 days is allocated for die tooling and extrusion sample approval. As an enterprise manufacturer with 180,000 m² of plant floor, we accommodate whole-home custom villa packages (MOQ ≥ 50 m²) up to full multi-container commercial multi-family schedules (20,000+ m²).

Interior sweating or frost accumulation occurs when the interior surface temperature of the frame drops below the ambient dew point. DERCHI eliminates this through deep polyamide nylon thermal breaks (PA66GF25) integrated into both the exterior frame and the perimeter sash. By thermally separating the exterior cold-conductive aluminum skin from the interior profile, the Condensation Resistance Factor (CRF) is elevated above 65-72. Paired with triple Low-E insulated glass units (filled with 90% Argon gas) and non-conductive composite warm-edge spacer bars, interior sash temperatures stay comfortably above the dew point even under exterior conditions of -30°C (-22°F).

Every production lot includes numbered labeling corresponding precisely to the architectural installation plan, accompanied by comprehensive bilingual installation manuals and step-by-step video guides. For high-volume multi-family developments or boutique resort projects, DERCHI offers on-site field engineering dispatch where senior technical managers oversee rough opening flashing, anchoring load distribution, and multi-point hardware calibration. For smaller deliveries, real-time remote video engineering consultations are provided during initial rough opening installations.