Custom OEM Aluminium Single Hung Windows Manufacturers & Suppliers

We offer total Original Equipment Manufacturer (OEM) and Original Design Manufacturer (ODM) flexibility. This includes custom extrusion die design, custom frame depths (e.g., 75mm, 90mm, 100mm, 120mm), tailored polyamide thermal break locations, specific glass pocket widths for double/triple glazing, custom powder coat or PVDF color matching (RAL/Pantone), custom hardware branding/laser etching, and specialized installation flange choices (nailing fin, brick seam, or retro-fit flush fin).

In a single hung window, only the bottom sash moves vertically while the top sash remains permanently fixed. In a double hung window, both upper and lower sashes operate. Single hung windows offer superior air infiltration performance, higher water tightness ratings, reduced mechanical wear, and lower long-term maintenance costs because the top sash is factory-sealed into the master frame. This structural simplicity makes single hung windows the preferred choice for commercial multi-family projects and hotels.

By combining our PA66 GF25 thermal-break extruded profiles with high-performance double or triple glass units featuring soft-coat Low-E (such as Solarban 60/70) and Argon gas fill, our custom single hung windows achieve U-factors ranging from 0.22 to 0.28 BTU/h·ft²·°F (1.25 to 1.59 W/m²K) and SHGC values as low as 0.18. These parameters comfortably comply with ENERGY STAR, IECC, and Passive House secondary standards.

Our products are engineered and tested in alignment with major global standards. This includes North American AAMA/WDMA/CSA 101/I.S.2/A440 (NAFS) specifications, Australian AS2047 and AS1288 codes, European CE mark standards (EN 14351-1), and ISO 9001 quality management systems. Complete physical test reports from accredited third-party laboratories are available upon contract agreement.

Our baseline Minimum Order Quantity (MOQ) for standard profile profiles is 50 square meters, while custom extrusion die development generally requires a project volume of 300+ square meters or equivalent tooling fee absorption. Typical production lead time is 25 to 35 business days following final shop drawing sign-off and deposit receipt. Sample prototyping can be expedited in 10 to 15 days.

We utilize heavy-duty constant force block-and-tackle spring balances or high-precision spiral balances sourced from leading hardware specialists (such as Caldwell or customized OEM equivalents). These balances are calibrated precisely to the individual sash weight, guaranteeing smooth fingertip operation, self-sustaining hold at any position, and proven durability rated beyond 50,000 continuous opening/closing cycles.

For harsh coastal projects, we specify 3-coat Fluorocarbon PVDF coatings (compliant with AAMA 2605) or Class I Anodized finishes (minimum 18-25 micron film thickness). Prior to coating, profile extrusions undergo multi-stage pre-treatment etching. This system provides high resistance against salt spray corrosion, chalking, and UV radiation degradation, backed by our long-term finish warranty.

Our in-house engineering design department provides detailed 2D CAD shop drawings, 3D BIM/Revit models, structural wind load calculation reports, thermal simulation modeling (THERM/WINDOW software), and physical corner samples for architectural approval prior to cutting raw material.