FAQ About Prefab ADU for US Clients Sourcing from China

Table of Contents

1. Product Structure & Customization of ADU

2. Materials & Performance Standards of ADU

3. Quality Certification & Compliance of ADU

4. Installation & Construction of ADU

5. Logistics & Customs Declaration of ADU

6. After-sales & Procurement of ADU

7. Materials & Environmental Protection of ADU

Product Structure & Customization

Q: What structure is your prefab ADU? Light steel, modular or container type?

A: We use a light steel modular ADU structure. Its main body is G550 high-strength light steel keel. We produce it as a factory-prefabricated prefab ADU. It is not a converted container house.

Q: Can the overall size, area and internal layout of the ADU be customized?

A: We support customizing the ADU’s size, area and internal layout. The minimum order quantity is 1 set. We offer standard ADU models for no special requirements. Our engineers will provide customized solutions and quotations for prefab ADU China products.

Materials & Performance Standards

Q: What materials are used for your ADU? What about exterior walls, roofs, floors and insulation of the ADU?

A: The ADU’s main structure is G550 light steel keel.For the roof, we adopt an integrated waterproof and thermal insulation design. As for the floor, it features a load-bearing light steel structure. Additionally, we use flame-retardant rock wool or rigid polyurethane foam insulation layers for adu house China products.

Q: Do materials of the ADU meet US standards (fireproof, waterproof, wind-resistant, earthquake-resistant)?

A: Our ADU materials meet US standards.

Q: How about the thermal insulation, sound insulation and heat insulation effects of the ADU? Is the ADU suitable for the US climate?

A: Our ADU suits all US climates. Its heat transfer coefficient meets local energy-saving requirements.For ADU partition walls, we achieve air sound insulation ≥45dB. Exterior walls of the ADU boast air sound insulation ≥40dB. We ensure ADU floors have impact sound insulation ≥65dB. Besides, we can thicken insulation layers for severe cold or hot areas for prefab ADU.

Quality Certification & Compliance

Q: How to ensure the quality of your ADU? Are there test reports and certifications for the ADU?

A: We conduct full-process acceptance for ADU production, transportation and installation. We provide test reports for ADU structural safety, enclosure performance, fire protection and environmental protection. We also assist in handling relevant US certifications for modular ADU as you require.

Q: Does your ADU comply with local US building codes (IRC, state/city requirements)?

A: Our ADU complies with US IRC building codes. It also meets local state and city building requirements. We can adjust ADU design and configuration according to target area standards for prefab ADU China.

Q: Can the ADU pass local approval? Can you provide documents required for ADU approval?

A: We can help your ADU pass local approval. We provide all documents needed for ADU approval. These documents include ADU design drawings, structural calculations, test reports and material certifications for adu house China.

Installation & Construction

Q: Is the whole ADU delivered as finished products or loose parts? Is ADU installation difficult?

A: We mainly deliver the ADU as modular finished products. We support two forms: ADU integrated modules and prefabricated modules. ADU installation is easy. You only need to splice and fix it according to drawings. No complex construction is needed for prefab ADU.

Q: Do local US workers need to install the ADU when the ADU arrives in the US? How long does it take to install the ADU?

A: You need local US workers to install the ADU. We offer remote guidance or dispatch technical personnel. A single standard modular ADU takes 1-2 weeks to install.

Q: Do you provide ADU installation drawings, instructions and videos?

A: We provide a full set of English ADU installation drawings. We also offer operation instructions and installation teaching videos. Additionally, we provide synchronous on-site technical guidance for adu house China.

Q: Are ADU water and electricity pipelines reserved or installed on site? Do the ADU water and electricity pipelines meet US standards?

A: We prefabricate and reserve ADU water and electricity pipelines in the factory. These pipelines meet US electrical and water supply standards. Their electrical insulation resistance is ≥1MΩ. Their grounding resistance is ≤4Ω. ADU water supply and drainage pass the water pressure test without leakage or backflow for prefab ADU China.

Q: What are the specifications of ADU doors and windows? Do the ADU doors and windows meet US energy efficiency requirements?

A: The ADU uses broken bridge aluminum alloy or UPVC plastic steel doors and windows. ADU external windows have air tightness ≥ grade 6. They meet US energy efficiency requirements for water tightness, wind pressure resistance and thermal insulation. They open smoothly and seal firmly for modular ADU.

Logistics & Customs Declaration

Q: Is the quotation for the ADU FOB or CIF? What fees are included in the ADU quotation?

A: We provide FOB quotation for the ADU by default. We can offer CIF quotation if you need it. The ADU quotation includes building material costs. We can supplement other fee details, which relate to adu build cost.

Q: What is the approximate sea freight for the ADU? Which port in the US does the ADU arrive at?

A: We calculate ADU sea freight based on actual cargo volume and destination port. We can deliver the ADU to major US ports. These ports include Los Angeles, Long Beach, New York and Seattle. This affects the overall adu build cost.

Q: How long does sea transportation of the ADU take? How long is the cycle from ADU production to delivery?

A: Sea transportation from China to major US ports takes 25-35 days. We finish ADU production in 45 working days after confirming drawings. The total cycle, including sea transportation, is about 70-80 days. This is a key part of adu build cost control.

Q: How many sets of ADU can a cabinet hold? What is the packaging method for the ADU?

A: The number of ADU sets per cabinet depends on the module size. A standard 20’/40′ cabinet can hold 1-3 ADU sets. We use moisture-proof film, frame reinforcement and anti-collision packaging for the ADU. This ensures maritime safety and avoids unnecessary adu build cost.

Q: Is customs clearance, tariff and certification required for importing the ADU to the US? Do you assist with ADU customs clearance?

A: You need customs clearance, tariff payment and relevant certification to import the ADU. We assist in providing documents for ADU customs clearance and certification. We also support docking the ADU customs clearance process to optimize adu build cost.

After-sales & Procurement

Q: How long is the warranty period for the ADU? How to deal with ADU quality problems?

A: The overall ADU product has a 1-year warranty. ADU components like walls, doors and windows are covered. We first solve ADU quality problems through remote guidance. We provide ADU accessories and technical support when necessary for prefab ADU.

Q: What is the minimum order quantity for the ADU? What about the ADU price, delivery time and payment terms?

A: The minimum order quantity for the ADU is 1 set. We offer tiered discounts for bulk purchases: 5, 10 or 20 sets. ADU delivery time is about 45 working days after confirming drawings. Payment terms are 50% advance deposit and 50% balance. This directly affects the adu build cost of modular ADU.

Materials & Environmental Protection

Q: Does the ADU product formaldehyde emission meet standards?

A: The ADU product’s formaldehyde emission meets relevant standards for adu house China.

Q: Can the ADU steel structures be recycled?

A: We can 100% recycle and reuse the ADU steel structures for prefab ADU China.