Close-up cross-section of a heavy-duty aluminum door profile showing the black PA66 nylon thermal break strip.
2026年2月6日
BY andy

Everything you need to know about costs, specs, lead times, and shipping from Shenghai Aluminum

Introduction

Are you planning to upgrade your home with sleek, modern aluminum doors but find local quotes astronomical? You are not alone. Many homeowners and contractors are turning to factory-direct sourcing to save costs without sacrificing quality.

 

At Custom-Aludoor (powered by Foshan Shenghai Aluminum Co., Ltd.), we bridge the gap between world-class manufacturing and your doorstep. Whether you are curious about our 15-day fast production, our specific aluminum alloys, or how we ship safely to your country, this guide answers the top questions asked by our global clients in 2026.

Shenghai Aluminum's 23,000 sqm extrusion factory in Foshan
Our 23,000 sqm manufacturing facility in Foshan, ensuring 100% in-house quality control from extrusion to assembly.

Part 1: Factory Capability & Trust (Who Are We?)

  • Q1: Who manufactures my doors? Is Custom-Aludoor a trading company?

     A: No, we are not a trading company. We are a 100% manufacturer. Your custom doors are produced directly by our parent factory, Shenghai Aluminum, located in Foshan, China—the global hub of aluminum manufacturing.

     

    Experience: Established in 2010, we have over 16 years of experience in aluminum extrusion and deep processing.

    Scale: Our facility covers 23,000 square meters and operates 7 advanced production lines.

    Control: From melting raw aluminum rods to the final assembly of your door, every step happens in-house. This allows us to strictly control quality and offer lower prices than trading companies who outsource production.

  • Q2: Why are your prices significantly lower than US/European showrooms?

    A: The price difference comes from the supply chain, not quality reduction. When you buy from a local showroom, the price includes:

    1. Importer's margin

    2. Wholesaler's markup

    3. Showroom rent and sales commissions

    By ordering from Custom-Aludoor, you are buying Factory Direct. You get the same (or better) ISO 9001:2015 certified quality but skip 3-4 layers of middlemen, often saving 30% to 50% on your project budget.

Part 2: Technical Specs & Performance (The Hardware)

  • Q3: What specific materials do you use for the door frames?

    A: We refuse to use recycled scrap aluminum. We use only primary 6063-T5 Aluminum Alloy.

    Strength: T5 tempering ensures the profile is hard enough to support large glass panels without bending.

    Thickness: For our heavy-duty folding and PT doors, our profile thickness typically ranges from 1.6mm to 2.0mm (exceeding the market standard of 1.4mm), ensuring robust structural integrity.

    Thermal Break: We use high-quality PA66 Nylon strips to separate the indoor and outdoor frames, providing excellent insulation against heat and cold.

    Close-up cross-section of a heavy-duty aluminum door profile showing the black PA66 nylon thermal break strip.
    The secret to keeping your home warm: Our heavy-duty profiles feature a PA66 Nylon Thermal Break strip to prevent heat loss and condensation.

  • Q4: What glass options do you offer for insulation and soundproofing?

    A: The glass is just as important as the frame. We offer fully customizable glazing options:

    Standard: Double Tempered Safety Glass (e.g., 5mm + 20A Argon + 5mm). The "20A" space is filled with Argon gas to maximize thermal efficiency.

    Privacy: Frosted or Tinted glass (Grey/Bronze) for bathrooms and bedrooms.

    Soundproofing: Laminated glass options are available if you live near a busy street.

  • Q5: Can I get insect screens for my folding doors?

    A: Absolutely. This is a top request from our clients in Australia and North America. We offer integrated Retractable Pleated Mesh Screens.

    Hidden Design: The screen pulls out when you need airflow but want to keep bugs out, and it folds away completely into the side frame when not in use.

    Durability: The mesh is made of durable fiberglass that resists tearing and weathering.

Part 3: Customization & Design

  • Q6: Can you match a specific color or wood finish?

    A: Yes. Our factory is equipped with professional surface treatment lines.

    Powder Coating: We can match any RAL color (e.g., the trending Anthracite Grey 7016 or Minimalist White 9016).

    Wood Grain: If you love the look of timber but hate the maintenance, our realistic Wood Grain Aluminum transfer technology is the perfect solution.

    Anodizing: For a metallic, high-tech look, we offer Champagne Gold, Silver, and Black anodized finishes.

  • Q7: What is a "PT Door" and why do you recommend it for small spaces?

    A: The PT Door (Push-Slide Door) is our signature space-saving solution. Unlike a standard sliding door that always blocks 50% of the opening, a PT door panel slides like a normal door but can then swing open 180 degrees flat against the wall.

    Benefit: It gives you a 100% clear opening width.

    Usage: Perfect for small kitchens, bathrooms, or narrow balconies where every inch counts.

    Animation demonstrating how a PT door slides open and then swings flat 180 degrees against the wall.
    See the magic: The PT Door slides like a standard slider but folds flat against the wall, giving you a 100% clear opening.

Part 4: Production, Shipping & Payment (The Process)

  • Q8: How long does production take? (Lead Time)

    A: We pride ourselves on speed. Our average lead time is just 15-20 days after drawing confirmation. Because we are a large-scale manufacturer with an annual output value of over $80 million, we have a steady stock of raw materials and efficient production schedules. You won't be waiting months just for manufacturing.

  • Q9: How do you pack the doors to prevent damage during international shipping?

    A: We treat packaging as a critical production step.

    1. Protective Tape: Applied to all aluminum surfaces to prevent scratches.

    2. Corner Protection: Hard plastic corners are added to door panels.

    3. Wooden Crates: The entire order is packed in solid plywood crates (non-fumigation required) that are forklift-friendly and designed to withstand rough sea handling.

  • Q10: What are your payment and shipping terms?

    A: We try to make international trade as easy as possible.

    • Currency: We accept USD, EUR, and HKD.

    • Payment Methods: T/T (Bank Transfer), L/C, PayPal, or Cash.

    • Shipping Terms: We offer FOB (we send to Chinese port), CIF (we ship to your port), or EXW (your agent picks up from our factory). We are experienced in exporting to North America, Southeast Asia, Australia, and the Middle East.

Part 5: Installation & After-Sales

  • Q11: Do I need a specialized contractor to install these doors?

    A: While we recommend hiring a professional carpenter or window installer, our doors are designed for straightforward assembly.

    • Pre-Assembly: We often pre-assemble the frame in the factory to test the fit, then label every part before packing.

    • Support: We provide detailed CAD drawings and installation diagrams. If your installer has questions, our technical team can provide video call support.

      Exploded view diagram showing the assembly components of a custom aluminum door frame and corner connectors.
      Don't worry about installation. We provide detailed CAD drawings and exploded diagrams to guide your contractor step-by-step.

  • Q12: What maintenance do aluminum doors require?

    A: Very little! Unlike wood, aluminum does not rot, warp, or require repainting.

    Cleaning: Simply wipe the frames with soapy water and a soft cloth twice a year.

    Tracks: Vacuum the bottom track (or clean the floor guide for PT doors) to keep the sliding motion smooth.

     

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