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Commercial Glazing Bid Comparison Checklist
Use this free Commercial Glazing Bid Comparison Checklist to review bids line by line—so you can compare glass, framing, performance, code items, schedule, and warranty. Then we help you connect with a licensed contractor.
Start with the same scope (or your bids can’t be compared)
Before you compare prices, confirm the bids are describing the same work. Glazing projects are often scoped in pieces—storefront systems, curtain wall or window wall, entrances, and glass/metal components—and a mismatch will make “apples to oranges.”
Ask each bidder to list what’s included and excluded. Look for items like field measurements, shop drawings/submittals, permits, product lead times, removal/disposal, and re-installation (if applicable). If the scope is not aligned, comparison will be misleading.
Tip: If you’re not sure what system you have (storefront vs curtain wall vs window wall), use photos and your drawings to describe the project. We can help you connect with a licensed commercial glazing contractor for clarification and a proper bid scope—at no cost to you.
Compare the glass specification (type, thickness, coatings, and performance)
Glass bids should be specific. Don’t accept vague language like “impact glass” without details. Compare the listed glass type and construction—tempered, laminated, insulated glass units (IGUs), and any special coatings (like Low-E).
For energy and comfort performance, bids may reference: U-factor (how much heat passes through), SHGC (how much solar heat passes through), and sometimes Visible Transmittance (VT). These values can vary by climate and glass configuration, so use the same targets across bids.
Also check safety glass items. In commercial settings, many locations require “safety” glazing. Common reasons include fall protection, impact resistance, and occupant safety. Laminated glass, tempered glass, or code-required assemblies are often used. Your bid should clearly state which assemblies are being provided.
Compare framing and the weatherproofing system (not just the glass)
A storefront, curtain wall, or window wall is a system. Compare the framing materials and details: aluminum framing type, infill setting methods, gaskets, sealants, thermal breaks, and how water/air is managed.
Curtain wall and window wall systems can look similar, but bids may treat them differently in terms of anchors, mullion spacing, and thermal performance. Storefront systems are often more modular and tied closely to building entrances and interior/exterior openings.
For performance, look for whether the bid addresses air/water sealing, drainage pathways, and any required movement joints. These details affect how the glazing performs over time. If the bid doesn’t explain them clearly, ask for a written clarification.
Check code, safety, and required approvals (ask what standards they follow)
Commercial glazing can trigger multiple requirements—building code, local amendments, safety glazing standards, and sometimes special performance needs. Bids should state what standards they are meeting and which items are “by code” versus “by design.”
Because code requirements vary by jurisdiction, always compare the specific assumptions in each bid: safety glass locations, structural load basis (as stated by design documents), fire-rated assemblies (if applicable), and any accessibility requirements.
Important: We can’t provide structural, code, electrical, or legal advice. But you can use this checklist to ask your bidder for clear written explanations, and you should hire a licensed, insured commercial glazing contractor for any higher-risk installation work.
Compare process items: submittals, lead times, schedule, and coordination
Glazing work is scheduled around glass fabrication lead times and building coordination. Look for a clear sequence: shop drawings/submittals, material procurement, fabrication, delivery, on-site install, and final closeout.
Check the schedule assumptions. Ask whether the bidder has accounted for long-lead components like custom storefront or curtain wall components, specific glass coatings, specialty interlayers, or insulating glass unit lead times.
Coordination matters. Compare whether the bid references coordination with structural steel, MEP rough-in, openings/frames, waterproofing at interfaces, and any required inspections. A bid that ignores coordination often leads to change orders.
Compare warranty, terms, and what “included” actually means
Warranties in commercial glazing vary widely—by product, workmanship, and sometimes by the glass assembly. Compare the warranty term length and what it covers (for example, manufacturing defects vs installation workmanship) and how claims are handled.
Also check exclusions and limitations. Look for terms like “normal wear,” “improper maintenance,” “acts of building owner,” or coverage limits tied to environmental conditions. If wording is unclear, request clarification in writing.
Finally, compare deliverables. A thorough bid often includes: product data, shop drawings, test reports or certificates where applicable, and closeout documentation. For many owners and building managers, these documents are as important as the materials.
Use this free checklist to compare commercial glazing bids by scope, glass and framing specs, safety/performance, schedule, and warranty—then we help you find a licensed contractor for the work.
Common questions
What’s the best way to compare bid pricing for commercial glazing?
Compare apples-to-apples by matching the scope (system type, locations, and included tasks) and the written glass + framing specifications. Then review performance items (U-factor/SHGC/VT, safety glazing requirements) and schedule assumptions. If the scope or specs don’t match, pricing won’t be truly comparable.
What should I look for in glass specs for storefront vs curtain wall vs window wall?
Look for the system type and how bids describe the assembly: infill glass type (tempered/laminated/IGU), coatings (like Low-E), and the framing/gasket/sealant approach. Bids should also clarify safety glazing assemblies and any performance targets that match your project drawings.
How do I tell if a bid is meeting safety glazing requirements?
Require the bidder to specify safety glazing by assembly and location (not just general claims). Compare whether they list the glass type used for safety and whether they state the standards or code references they are following. If unclear, ask for written clarification.
Why do commercial glazing bids often have long lead times?
Glass and glazing components are often custom-fabricated—especially insulating glass (IGUs) with specific coatings, specialty laminated assemblies, and custom storefront/curtain wall components. Lead times can also be affected by required submittals and approvals before fabrication begins.
Is this checklist a substitute for code or structural review?
No. This is general, educational bid-comparison guidance, not structural, code, electrical, or legal advice. For higher-risk glazing work, always rely on licensed, insured commercial glazing contractors and coordinate with the project’s design and permitting team.