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Foshan, Guangdong Province, China, functions as a global center for aluminum extrusion and sunroom production. The industry cluster in Nanhai District encompasses factories specializing in aluminum profiles, glass processing, and hardware manufacturing. Production lines in this region supply components for residential and commercial construction projects. Logistics infrastructure in Guangdong facilitates container shipments through Nansha and Yantian ports. Export operations for sunroom systems target markets in North America, Australia, and Europe. Factory output in Foshan adheres to production schedules for 2026 delivery. Manufacturers maintain inventories of aluminum billets and glass panels to meet demand for sunroom structures. The supply chain includes suppliers of EPDM gaskets, silicone sealants, and stainless steel fasteners.
Sunroom structures utilize aluminum alloy 6063 due to its extrusion properties and surface finish capabilities. The T5 temper involves air cooling from an extrusion temperature and artificial aging. The T6 temper involves solution heat treatment and artificial aging to achieve higher mechanical strength. Aluminum alloy 6063 contains Silicon (0.2%–0.6%), Iron (0.35% maximum), Copper (0.1% maximum), Manganese (0.1% maximum), and Magnesium (0.45%–0.9%). These elements contribute to the tensile strength and corrosion resistance of the frame.
Structural frames for sunrooms require specific wall thicknesses to support glass loads and wind pressure. Profile dimensions vary based on engineering requirements:
Wall thickness selection depends on the span of the sunroom roof and the weight of the glazing units. Span calculations determine the deflection limits for the aluminum members.
The mechanical properties of 6063-T5 and 6063-T6 aluminum alloys define the load-bearing capacity of the sunroom:
| Property | 6063-T5 | 6063-T6 |
|---|---|---|
| Ultimate Tensile Strength | 186 MPa (27,000 psi) | 241 MPa (35,000 psi) |
| Yield Strength | 145 MPa (21,000 psi) | 214 MPa (31,000 psi) |
| Elongation | 12% | 12% |
| Hardness (Webster) | ≥ 10 | ≥ 13 |
Thermal management in sunroom structures involves the use of PA66GF25 thermal break strips. PA66 refers to Polyamide 66 (Nylon), and GF25 indicates a 25% glass fiber reinforcement. This material separates the exterior aluminum profile from the interior aluminum profile, reducing heat conduction through the frame.
The thermal conductivity of PA66GF25 is approximately 0.25 W/m·K. In contrast, the thermal conductivity of aluminum is 200 W/m·K. The insertion of the polyamide strip creates a thermal barrier. This barrier minimizes heat gain in summer and heat loss in winter. The width of the thermal break strip affects the U-factor of the frame. Standard widths include 14.8mm, 20mm, 24mm, 30mm, and 35mm. Multi-cavity thermal breaks provide additional insulation by reducing convection within the profile.
The PA66GF25 strip maintains structural integrity under temperature fluctuations. The glass fiber reinforcement ensures that the coefficient of linear thermal expansion for the polyamide strip matches that of the aluminum profile. This prevents separation or cracking of the composite profile during thermal cycling. The tensile strength of the strip exceeds 80 MPa, ensuring the composite profile supports the weight of triple-glazed units.
Sunroom glazing involves tempered glass, laminated glass, and insulated glass units (IGU). Engineering specifications for glass include thickness, coating type, and gas fill.
Roof glazing requires laminated safety glass to prevent injury from breakage. Side wall glazing utilizes insulated glass units for thermal efficiency. Common configurations include:
PVB (Polyvinyl Butyral) and SGP (SentryGlas Plus) interlayers provide impact resistance. SGP interlayers offer higher stiffness for structural glazing applications.
Low-E (Low Emissivity) coatings reflect infrared radiation. Single-silver, double-silver, and triple-silver Low-E coatings offer varying levels of solar heat gain control. Argon gas fill in the IGU cavity reduces heat transfer via convection. The concentration of argon gas is maintained at 90% minimum. Molecular sieves in the spacer bar absorb moisture to prevent condensation within the air gap.
Hardware components control the operation of sunroom doors and windows. The hardware package includes handles, hinges, rollers, tracks, and locking mechanisms.
SIEGENIA provides hardware for lift-and-slide door systems. The mechanism lifts the door sash from the track to allow movement on rollers. The handle rotation of 180 degrees operates the lift function. SIEGENIA hardware supports sash weights of 150kg, 250kg, 300kg, and 400kg. The rollers utilize stainless steel ball bearings for movement. The locking points engage with the frame to provide air tightness and security.
ROTO manufactures hardware for tilt-and-turn windows and sliding systems. The Roto Patio series includes hardware for parallel sliding and folding doors. Hardware components feature Roto Sil Pro surface coating for corrosion resistance. Testing procedures for Roto hardware involve 25,000 cycles of operation to verify longevity. Locking cams and striker plates provide multiple points of engagement.
HOPO focuses on hardware for aluminum window and door systems in various climates. HOPO handles feature ergonomic designs and powder-coated finishes. Roller systems for sliding doors incorporate nylon or stainless steel wheels. HOPO products undergo salt spray testing for 480 hours minimum to evaluate corrosion resistance in coastal environments.
Sliding doors in sunrooms provide access and ventilation. The engineering of these doors involves the track system, sill design, and sash assembly.
Sunroom sliding doors utilize double-track or triple-track systems. Triple-track systems allow for a wider opening as two sashes slide behind a third sash. The sill incorporates a drainage channel to manage water runoff. The height of the sill varies from 20mm (low-profile) to 60mm (rated water resistance). Stainless steel tracks prevent wear from roller movement.
EPDM (Ethylene Propylene Diene Monomer) gaskets provide weather seals for the door sash. Gaskets are located at the perimeter of the sash and at the meeting stiles. The compression of the gaskets prevents air infiltration and water ingress. Brush seals are used in standard sliding doors, while compression gaskets are used in lift-and-slide systems. The air permeability of the door system is tested according to ASTM E283 or EN 12207.
Manufacturers in Foshan obtain certifications to demonstrate compliance with international building codes. These standards define the requirements for structural performance and safety.
The AS2047 standard specifies the requirements for windows and external glazed doors in buildings. Testing includes:
AS1288 defines the selection and installation requirements for glass in buildings.
CE marking indicates compliance with European Union health, safety, and environmental protection standards. For sunroom systems, the relevant standard is EN 14351-1. This standard covers air permeability, water tightness, wind resistance, and thermal transmittance (U-value).
The National Fenestration Rating Council (NFRC) provides energy performance ratings for sunroom components. Ratings include U-factor, Solar Heat Gain Coefficient (SHGC), and Visible Transmittance (VT). The American Architectural Manufacturers Association (AAMA) provides specifications for the structural performance of windows and doors. AAMA ratings (R, LC, C, HC, AW) indicate the performance class and grade based on testing.
FOB (Free On Board) prices for sunroom systems in Foshan are calculated based on the specifications of the aluminum, glass, and hardware. Prices for 2026 are subject to material cost fluctuations in the aluminum and glass markets.
| System Grade | Frame Thickness | Glazing Specification | Price (USD/sqm) |
|---|---|---|---|
| Grade A (Entry) | 1.4mm - 2.0mm | 6mm Single Tempered | $120 - $180 |
| Grade B (Standard) | 2.0mm - 3.0mm | 5mm + 12A + 5mm IGU | $200 - $300 |
| Grade C (Premium) | 3.0mm - 4.0mm | 6mm + 12A + 6mm Low-E IGU | $350 - $500 |
| Grade D (Structural) | 4.0mm - 5.0mm | 6mm + 1.52PVB + 6mm Laminated | $550 - $800 |
Note: Prices include the aluminum frame, glass units, and hardware systems. Shipping costs and installation are not included in FOB rates. Minimum order quantities (MOQ) typically start at 20 square meters.
The production of sunroom components in Foshan involves several stages of engineering and quality verification.
Aluminum billets are heated and forced through dies to create profiles. The extrusion speed and temperature are monitored to ensure consistent properties. After extrusion, profiles undergo aging in ovens to achieve the required hardness. Surface treatments include powder coating, anodizing, and electrophoresis. Powder coating follows Qualicoat standards for thickness and adhesion.
CNC (Computer Numerical Control) machines perform cutting, drilling, and milling of the aluminum profiles. Accuracy is maintained within ±0.5mm. Corner assembly utilizes mechanical corner keys and hydraulic crimping machines. Sealant is applied to the joints to prevent water leakage. Glass units are installed with glazing beads and EPDM gaskets.
Sunroom components are packaged for international transport to prevent damage. Export operations involve documentation for specifieds and shipping.
Aluminum profiles are wrapped in protective film and pearl cotton. Glass units are placed in plywood cases with corner protectors. Wooden crates provide structural support for the shipping process. Cases are labeled with dimensions, weight, and contents. Fumigation certificates are provided for wooden packaging materials.
Standard shipping containers include 20GP, 40GP, and 40HQ. Loading plans optimize the use of space and ensure weight distribution. A 20GP container accommodates approximately 50-70 square meters of sunroom components. A 40HQ container accommodates 120-150 square meters. Shipping time from Foshan to major global ports ranges from 15 to 45 days.
Installation of the sunroom structure involves mechanical fasteners and weatherproofing materials. The process follows the engineering drawings provided by the manufacturer.
Expansion bolts and stainless steel screws secure the sunroom frame to the building structure. The diameter and length of the bolts are determined by the load requirements. Fasteners are spaced at intervals of 300mm to 500mm. Bracket systems provide additional support for roof rafters.
Structural silicone sealant and neutral weather-resistant sealant provide the final seal between the frame and the building. EPDM gaskets are used at all glazing interfaces. Flashings and gutters manage water runoff from the roof. The installation process includes a water test to verify the integrity of the seals.
The Foshan sunroom industry provides engineering solutions for the construction sector. Manufacturers utilize aluminum alloy 6063-T5, PA66GF25 thermal breaks, and safety glazing to produce structures for export. Hardware systems from SIEGENIA, ROTO, and HOPO define the operation of doors and windows. Compliance with AS2047, CE, and NFRC standards ensures product safety and performance in global markets. The 2026 price list reflects factory rates for various sunroom grades in Guangdong, China.
The installation of aluminum sunroom structures requires a level concrete foundation. The main support posts are anchored using M12 expansion bolts with a minimum embedment depth of 100mm. The rafters are secured to the wall plate using structural brackets. All joints between the aluminum profiles and the building wall must be sealed with neutral-cure silicone sealant. The glazing units are installed using EPDM gaskets to allow for thermal expansion and contraction.
Due to the size of sunroom components, specialized packaging is required. Rafters and posts are wrapped in protective film and packed in wooden crates. Glass units are crated separately. For a standard 20 square meter sunroom, the components typically occupy 40% of a 20GP container. For large projects, we optimize loading to fit 4 to 6 units per 40HQ container.
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