How to Request a Quote for Custom Aluminum Windows and Doors
A useful quote for custom aluminum windows and doors begins with a clear purchasing brief. If suppliers receive different dimensions, glass requirements, or delivery assumptions, the prices they return may describe different orders.
Contractors, developers, and purchasing teams can make the process easier by sending the same window and door schedule to each supplier. You do not need to resolve every detail before the first inquiry. Identify what is confirmed, what needs a recommendation, and whether you need an initial estimate or a final quotation.
State the project and the stage of the inquiry
Start with the project location, building type, and purchasing scope. Explain whether you need a full window and door package, replacement units, or a selection of products for resale. Include the target delivery date and the drawings currently available.
For an early budget estimate, mark dimensions and quantities as preliminary. For a quotation intended to support an order, provide the latest schedule and drawings. Tell the supplier when technical submissions are due and who will review the proposed products.
If the project is still being designed, ask the supplier to list its assumptions. An estimate based on provisional information should be updated when the scope is confirmed.
Prepare a window and door schedule
Assign an opening reference to each item, such as W01 or D01. Use the same references in drawings, quotations, and later order documents. Group identical items only when their dimensions, configuration, and requirements are actually the same.
| Information | What to include |
|---|---|
| Opening reference and quantity | A unique reference and the number of matching units. |
| Dimensions | Width and height, units, and whether these are wall opening or finished frame dimensions. |
| Operation and layout | Fixed, casement, awning, sliding, or other required style, with panel arrangement. |
| Opening direction | A drawing showing the direction and which side the view is taken from. |
| Location | The room, elevation, floor, or project area where the unit will be used. |
| Drawing revision | The date or revision number the quotation should follow. |
A labeled sketch is often more useful than a description such as “left-opening door,” which can be interpreted differently depending on the viewing side. If final site measurements are not yet available, identify who will take and approve them before manufacturing.
Describe the configuration you want priced
List the frame system if one has already been selected. Otherwise, describe the intended use and ask the supplier to recommend a system with its assumptions stated. Include the finish, color reference, and any sample approval requirement.
For glass, identify the required build-up where known, including any Low-E coating, insulating cavities, gas fill, or specified safety or impact performance. If you want alternatives, request a separate price for each complete configuration. “Double glazing” on its own leaves several choices unresolved.
Describe the hardware and accessories too. Locks, handles, screens, thresholds, and spare parts can affect what is included in a quote. Mark optional items separately so a low base price is not mistaken for the total supply cost.
Include performance and document requirements
Attach the performance requirements provided by the project designer. Depending on the project, these may include thermal performance, design pressures, impact resistance, water penetration resistance, or acoustic performance. State the units and applicable reference requirements supplied by the design team.
Ask the supplier to identify the supporting records for the proposed configuration. If a particular certification, rating, or approval is required, name it in the inquiry and request the relevant document reference. Record any gaps as open technical items before accepting the final offer.
Useful documents can include product data, drawings, test reports, and applicable certification or approval records. The list should follow the project’s needs. If a lower-priced alternative changes a performance requirement, ask for that difference to be made explicit and reviewed by the responsible project team.
Define delivery and the scope of supply
Give the intended delivery destination and say whether you need a product-only price or an offer including specified transport services. Ask each supplier to state the delivery basis and what it excludes. For international orders, have your logistics adviser review the proposed arrangements before they are finalized.
Clarify packing, labels, unloading arrangements, storage instructions, and whether deliveries need to follow construction phases. If the order is split into batches, identify the quantities and timing for each batch.
Ask the supplier to distinguish production time from transit time and to state what starts the production schedule. Drawing approval, payment, and material confirmation may be relevant milestones; get the proposed sequence in writing. Also confirm the quotation currency, payment stages, validity period, and warranty terms.
Compare offers line by line
Build a comparison sheet using the opening references from your schedule. Check quantity, dimensions, frame, glass, hardware, supporting documents, and supply scope before comparing totals.
For example, two offers may both describe an aluminum sliding door, while only one includes the requested glass option and screens. Ask for the missing items to be priced, then compare the revised totals. Treat this as a clarification exercise and keep the responses with the quotations.
Before placing the order, have the relevant technical and commercial reviewers confirm the final version. Changes agreed by email should be reflected in the quotation and drawings used for production.
Use this first inquiry template
You can adapt the following message and attach your schedule:
We are requesting a quotation for custom aluminum windows and doors for [project location and building type]. Attached are our window and door schedule and drawings, revision [reference]. Please quote against the listed quantities and configurations, identify any assumptions or deviations, and show optional items separately. Please include the available product documents, proposed delivery basis, estimated production lead time and its starting conditions, payment terms, quotation validity, and exclusions. Our target delivery date is [date]. Please let us know what additional information you need.
To discuss a Xiaoluban order, explore our window and door systems and product documentation, then send your schedule and drawings. Include the items still under review so the discussion can focus on the choices that affect your quotation.