| 1 |
Set a complete project budget |
Include windows and doors, installation, permits, disposal, interior or exterior repairs, and any required structural work. |
A written, itemized estimate that identifies included and excluded work. |
Compare the total installed cost, not just the product price. Keep funds available for scope changes or concealed damage. |
| 2 |
Check local code requirements first |
Requirements depend on the property location, building type, opening, and applicable wind and impact rules. |
Written confirmation of the applicable code criteria and any required product approvals or permits. |
Confirm compliance before comparing prices; a noncompliant product may require replacement or additional work. |
| 3 |
Match performance to each opening |
Check the required design pressure and impact protection for each location, size, and configuration. |
Product documentation showing the tested or approved configuration and performance ratings. |
Different openings may require different specifications; avoid paying for assumptions that have not been verified. |
| 4 |
Compare complete, like-for-like quotes |
Compare product type, glass and frame specifications, opening sizes, hardware, installation scope, and finish work. |
At least three detailed quotes when practical, with any differences clearly listed. |
A lower quote may exclude permits, trim, disposal, or repairs. Resolve exclusions before choosing. |
| 5 |
Verify product approval and documentation |
Make sure the exact product, size, glazing, and configuration are suitable for the project and jurisdiction. |
Approval listings or test documentation that can be checked with the relevant authority. |
Allow time for document review before ordering; custom or nonstandard configurations may affect cost and lead time. |
| 6 |
Choose a qualified supplier |
Assess experience with impact-rated products, accurate measuring, ordering, delivery, and customer support. |
References for comparable projects, written product details, and clear answers about approvals and lead times. |
Consider service and documentation as part of value, not only the quoted product price. |
| 7 |
Check installer qualifications |
Confirm the installer has relevant experience and any license or registration required in your area. |
Current credentials where required, proof of insurance, references, and a clear description of who performs the work. |
Verify responsibility for permits, inspections, and subcontractors before signing. |
| 8 |
Review the installation plan |
Ask how the existing units will be removed and how the new units will be anchored, sealed, and integrated with the opening. |
A written scope covering installation details, protection of the home, cleanup, and inspection arrangements. |
Clarify whether trim, water-damage repairs, painting, and disposal are included or charged separately. |
| 9 |
Understand warranties and payment terms |
Review product and labor coverage, exclusions, claim steps, project schedule, cancellation terms, and payment milestones. |
Written warranty documents and a signed contract with a payment schedule and change-order process. |
Budget for any items excluded from coverage and avoid relying on verbal promises. |
| 10 |
Inspect the completed work |
Check operation, locks, visible seals, finishes, and completion of agreed repairs; arrange required inspections. |
Completion records, inspection sign-off when applicable, care instructions, and copies of product documents. |
Document any outstanding items in writing and follow the contract's process for final payment. |