Subcontractor Invitation Tender Letter for Glass and Aluminum Works

What a good one includes

• A clear definition of the scope of work, specifying whether the contract covers exterior curtain walls, storefront framing, interior glazing, or custom aluminum fabrication.
• Accurate project timelines, including the anticipated on-site start date, key milestones, and the final completion deadline for the glazing phase.
• Detailed instructions on how and where to submit bids, including the exact closing date, time, and preferred digital format.
• A comprehensive list of the tender package contents, referencing attached architectural drawings, structural engineering specifications, and hardware schedules.
• Specific site access details, project location, and mandatory site-visit dates so subcontractors can accurately assess installation logistics.
• Explicit compliance requirements, such as necessary trade licenses, safety certifications, and minimum liability insurance coverage.
• Clear contact information for a designated point of contact to handle technical queries and requests for information during the bidding period.

Common mistakes to avoid

• Vague scope descriptions that fail to specify whether the subcontractor is responsible for glass procurement, aluminum extrusion fabrication, or just on-site installation.
• Setting unrealistically tight bidding deadlines that force high-quality subcontractors to pass on the project or submit inflated, risk-adjusted prices.
• Omitting critical structural engineering requirements or wind-load specifications that directly dictate the thickness and cost of the glass and aluminum frames.
• Neglecting to clarify payment terms, retention percentages, or progress claim schedules, which can deter established, professional trades from submitting a bid.

Frequently asked questions