1. The Exact Window Manufacturer and Product Series

An estimate that simply says "replacement windows" is not specific enough.

The proposal should identify the manufacturer and exact product series being installed.

This gives you a clear way to compare specifications, warranties, glass options, and features between estimates.

2. The Window Style for Each Opening

The estimate should identify what style of window is being installed in each opening.

Common styles include:

• Double-hung windows
• Single-hung windows
• Casement windows
• Awning windows
• Sliding windows
• Picture windows
• Bay windows
• Bow windows
• Garden windows
• Basement or egress windows

Different styles have different costs, hardware, performance characteristics, and installation requirements.

You can review available replacement window styles before deciding which configuration works best for your home.

3. The Glass Package

The glass package can have a major impact on both price and performance.

Your estimate should clearly state whether the windows include:

• Double-pane or triple-pane glass
• Low-E coatings
• Argon or krypton gas fill
• Warm-edge spacer systems
• Tempered glass where required
• Obscure or decorative glass where selected

Two windows can look almost identical while having very different glass systems and energy performance.

4. Energy-Performance Specifications

A contractor should be able to provide the performance information for the exact window being quoted.

Important ratings may include:

• U-factor
• Solar Heat Gain Coefficient
• Visible Transmittance
• Air leakage, when available
• NFRC certification information
• ENERGY STAR qualification where applicable

These numbers make it easier to compare performance instead of relying only on phrases such as "high efficiency" or "energy saving."

5. Interior and Exterior Colors

Window color can affect price and appearance.

Make sure the estimate identifies the selected interior and exterior colors, especially if you are choosing a non-standard finish or a different color outside than inside.

If you are considering black, bronze, woodgrain, or custom finishes, confirm that the exact selection appears in writing.

6. Grid Style and Pattern

If your windows include grids, the estimate should identify the style and pattern.

That may include:

• Colonial grids
• Prairie grids
• Perimeter grids
• Custom grid patterns
• Grid-between-the-glass options

Custom grids can significantly affect the finished appearance, so they should not be left to verbal discussion alone.

7. Removal of the Existing Windows

Confirm whether removal of the old windows is included in the estimate.

Ask whether the contractor will remove the complete existing window unit or perform an insert-style replacement where appropriate.

The estimate should make clear what is being removed and what is staying in place.

8. Disposal of Old Windows and Debris

Disposal should not be assumed.

Ask whether the contractor will remove the old windows, glass, trim scraps, packaging, and other project debris from your property.

You should know what condition the work area will be left in when the project is complete.

9. Opening Preparation

A replacement window is only as good as the opening it goes into.

The estimate should explain how the contractor will prepare the opening before installing the new window.

This may include cleaning the opening, checking for damaged wood, correcting minor issues, and preparing the surface for proper sealing and installation.

10. Insulation Around the Window

The space between the replacement window and the rough opening needs to be addressed properly.

Ask what type of insulation or sealing method will be used around the new window and whether that work is included in the price.

The window itself can have excellent performance ratings, but gaps around the unit can reduce the comfort and performance of the completed installation.

11. Exterior Flashing and Water Management

Replacement windows are part of the home's exterior weather-management system.

Ask how the contractor will handle exterior sealing, flashing, and transitions with the existing siding, brick, trim, or other wall materials.

These details can be just as important as the window itself.

12. Exterior Trim or Aluminum Capping

Exterior finishing can vary significantly between contractors.

If aluminum capping or custom exterior trim is included, the estimate should state that clearly.

Ask what color will be used, what existing wood will be covered, and how the new trim will integrate with the surrounding exterior.

13. Interior Trim and Finishing

Do not assume interior finishing is included.

Ask whether the contractor will reuse existing trim, install new casing, repair drywall, caulk interior joints, or perform any painting or staining.

If those items are not included, you should know before the project starts.

14. What Happens if Hidden Damage Is Found?

Removing old windows can sometimes reveal deteriorated wood, water damage, or previous installation problems.

The estimate should explain how unexpected repairs are handled.

Ask whether the contractor will show you the issue, provide a price, and receive approval before performing additional work.

15. Manufacturer Warranty

Your estimate should identify the manufacturer's warranty protecting the actual window.

Ask what is covered, including:

• Frame and sash
• Insulated glass
• Hardware
• Finish
• Screen components
• Transferability
• Prorating or exclusions

16. Contractor Workmanship Warranty

Manufacturer coverage and installation coverage are not the same thing.

Ask what the contractor guarantees about the installation itself and how long that workmanship protection lasts.

Suburban Construction Inc. backs its installations with a lifetime workmanship guarantee.

17. Service After Installation

Ask what happens if you need help five or ten years later.

Will the contractor help with replacement parts? Warranty claims? Hardware issues? Glass concerns?

Suburban provides support after installation and can help customers coordinate manufacturer warranty claims.

Learn more about our service and support .

18. Project Timeline

The estimate or contract should give you a reasonable expectation for the project schedule.

Ask about anticipated lead time, installation timing, and how schedule changes will be communicated.

19. Payment Terms

The payment schedule should be clearly written.

Make sure you understand:

• Total project price
• Deposit
• Progress payments, if any
• Final payment
• Financing terms, when applicable

20. Everything You Selected Should Appear in Writing

If you selected a specific color, glass package, grid pattern, hardware finish, or other option, make sure it appears in the estimate or contract.

Do not rely on verbal promises for details that are important to the finished project.