How to Choose a Facade Contractor

Before you contact a single contractor, document what you need. Vague requirements produce vague proposals, and vague proposals become disputes during execution.

The requirement definition should cover eight dimensions:

• Project type and scale: High-rise tower, mid-rise podium, cultural landmark, airport terminal? Each demands different contractor experience.
• Facade area and complexity: A flat rectangular tower is not the same as a curved free-form museum facade. Complexity drives tooling, engineering and risk.
• Geographic and climatic conditions: Typhoon exposure, seismic zone, freeze-thaw cycling, marine salt atmosphere — each requires specific material selection and testing.
• Budget range: Knowing your envelope budget allows contractors to propose realistic systems rather than under-bidding with an intent to claim variations later.
• Programme milestones: Design completion, mock-up approval, production start, installation sequence and handover date. The programme determines whether a contractor has capacity to deliver.
• Special technical requirements: BIM Level 2 compliance, LEED certification targets, specific fire ratings, acoustic performance targets, BIPV integration.
• Quality and warranty expectations: Warranty period (typically 5–10 years for waterproofing, 2 years for defects), maintenance provisions, spare parts availability.
• Local content and labour requirements: Some jurisdictions mandate local fabrication or local workforce participation. Confirm whether the contractor can comply.

Qualification pre-screening is a document-based filter. It eliminates contractors who lack the legal standing, financial capacity or technical experience to execute your project. Request the following documents from every long-list candidate:

• Business licence and registration: Verify legal existence, registered capital and business scope. In China, this includes the business licence (yingye zhizhao) and any branch registrations.
• Construction qualifications: Curtain wall engineering special-grade qualification (jianzhu muqiang gongcheng zhuanye chengbao yiji/teji) is the minimum for projects above certain scales. Verify the qualification level against your project's requirements.
• Safety production licence: A valid safety production permit (anquan shengchan xukezheng) is mandatory for construction contractors in China and equivalent jurisdictions.
• ISO certification: ISO 9001 (quality), ISO 14001 (environment) and ISO 45001 (safety) demonstrate management system maturity. Verify the certificates are current and issued by an accredited body.
• Financial statements: Audited financials for the past three years. Look for consistent profitability, reasonable debt ratios and sufficient working capital. A contractor with negative cash flow is a contractor who may not pay suppliers.
• Bank reference or credit report: Confirms financial standing and access to bonding or performance guarantees.
• Project reference list: At least three comparable completed projects, with client contact details. The projects should match your project in type, scale and complexity.
• Client recommendation letters: Written testimonials from previous clients, ideally including contact details for direct verification.
• Key personnel CVs: The project manager, technical director and quality manager who will actually work on your project. Verify their qualifications, experience and tenure with the company.
• Equipment and capacity list: CNC machines, cutting centres, glass tempering lines, sealant dispensing robots, testing equipment. The list should demonstrate capacity for your project's volume and complexity.

Pre-screening is not a beauty contest — it is a pass-or-fail gate. Any candidate who cannot produce complete, verifiable documentation should be eliminated without exception.

The factory visit is the most revealing step in the selection process. A well-organised factory with clean floors, labelled materials and documented processes is a factory that cares about quality. A chaotic factory with random glass stacks and workers without PPE is a factory that will deliver random quality.

What to look for:

• Shop floor organisation: Is the production flow logical — receiving, cutting, fabrication, assembly, testing, packing? Or do materials backtrack and cross-contaminate?
• Material storage: Is glass stored vertically on racks, protected from dust and damage? Are aluminium profiles segregated by alloy and finish? Are sealants stored within temperature limits?
• In-process quality control: Are there inspection stations between operations? Are dimensional checks recorded? Is non-conforming material segregated and tagged?
• Testing equipment: Is there a calibrated air and water test chamber? Is there a structural load frame? When were they last calibrated?
• Documentation systems: Can the factory trace a finished unit back to its raw material batch, its operator and its inspection record? Traceability is the foundation of accountability.

What to ask:

• What is your current capacity utilisation? (Above 85% suggests limited flexibility.)
• What is your typical production lead time from approved shop drawings to delivery?
• How do you handle design changes after production has started?
• What is your on-time delivery record for the past 12 months?
• What is your warranty claim rate?

How to verify: Ask to see production records from a current project. Request to speak with the quality manager without the sales team present. Take photographs (with permission) and compare them across factory visits. A factory that refuses photography or restricts access to the shop floor has something to hide.

Commercial negotiation should begin only after the technical evaluation is complete. Negotiating price before technical compliance is confirmed invites the "low bid, high variation" trap.

Total price versus unit price: Compare not just the lump sum but the unit rates for variations. A low lump sum with high variation rates is a contract that becomes expensive the moment the design changes — which it will.

Payment terms and risk allocation: What is the advance payment percentage? What is the milestone-based payment schedule? Does the contractor accept retention (typically 5–10% held until final acceptance)? Who bears the cost of design changes initiated by the owner?

Change management process: How are variations priced and approved? Is there a defined process with time limits for owner approval? A contractor who prices variations at cost plus a fixed margin is more transparent than one who prices them ad hoc.

Liquidated damages and incentives: Is there a daily rate for late completion? Is there a bonus for early completion? Both create accountability. Be wary of contractors who refuse liquidated damages — they are signalling that they may not meet the programme.

Insurance and bonds: Is the contractor required to provide performance security (bank guarantee or bond), typically 10% of contract value? Is all-risks insurance in place for materials in transit and on site? Who is named as additional insured?