ES Windows vs. CWS: What Florida Homeowners Should Verify Before Choosing

Florida homeowners comparing impact windows often come across two names: ES Windows and Custom Window Systems, commonly called CWS.

Both manufacturers may appear on impact window quotes, but choosing between them should involve more than comparing brand names.

The exact product series, frame material, glass package, product approval, window configuration, warranty, installation scope, and contractor can all affect what you are actually buying.

That means the better question is not simply, "Is ES Windows or CWS better?"

A more useful question is: Which specific ES or CWS product is being quoted, and is that product appropriate for my home, openings, location, and priorities? 

This guide explains what Florida homeowners should verify before choosing between ES Windows, CWS, or any other impact window manufacturer.

ES Windows vs. CWS: Start With the Exact Product

One of the biggest mistakes homeowners can make is comparing manufacturers without identifying the actual products included in the quotes.

A manufacturer may offer multiple product lines, styles, sizes, glass configurations, and performance options.

Before comparing two proposals, identify:

• The manufacturer
• The exact product series
• The window style
• The frame material
• The exact glass configuration
• The proposed dimensions
• The applicable product approval
• The hardware and finish
• The installation scope
• The warranty

If those details are different, you may not be comparing equivalent products even if both proposals say "impact windows."

What Is ES Windows?

ES Windows manufactures window and door systems that Florida homeowners may encounter while researching impact-resistant products.

Depending on the particular product series and project, ES products may be considered for residential applications involving impact windows, impact doors, and large glazed openings.

ES is particularly relevant for homeowners researching aluminum-framed impact systems and contemporary architectural designs.

However, homeowners should evaluate the exact ES product being proposed rather than assuming every ES product has identical specifications.

What Is CWS?

Custom Window Systems, or CWS, is a Florida-based manufacturer of windows and doors.

Florida homeowners may encounter CWS products while comparing replacement impact windows and doors.

CWS can be especially relevant for homeowners considering vinyl impact windows, although the exact options available depend on the current product line and project.

As with ES, the CWS name alone does not provide enough information to evaluate a quote.

Is ES Windows Better Than CWS?

There is no universal answer that applies to every Florida home.

ES and CWS can offer different products that may fit different types of projects.

The appropriate choice can depend on:

• Frame material
• Opening size
• Window style
• Glass package
• Architectural preferences
• Applicable product approval
• Design requirements
• Energy-performance priorities
• Budget
• Warranty

Instead of trying to declare one manufacturer universally better, compare the specific products available for your project.

ES vs. CWS: Aluminum and Vinyl Are an Important Difference

Frame material is one of the first things homeowners should identify when comparing impact window quotes.

Florida homeowners commonly encounter both aluminum and vinyl impact window systems.

ES products may be particularly relevant when researching aluminum impact systems, while CWS may appear frequently in searches for vinyl impact windows.

That distinction matters because comparing an aluminum product with a vinyl product is not necessarily an apples-to-apples comparison.

Vinyl Impact Windows

Vinyl impact windows may appeal to homeowners interested in characteristics such as:

• Thermal performance
• Residential appearance
• Frame construction
• Low-maintenance material characteristics
• Available window configurations

The actual performance still depends on the complete product, including the glass, frame, dimensions, hardware, and installation.

Aluminum Impact Windows

Aluminum impact windows may appeal to homeowners interested in:

• Contemporary architecture
• Different frame profiles
• Large glazed openings
• Specific window and door configurations
• Product options available in aluminum systems

Again, homeowners should compare the actual product rather than assuming every aluminum impact window performs identically.

Is Vinyl Better Than Aluminum for Florida Homes?

Neither material is automatically the correct choice for every home.

A homeowner may prefer vinyl for one project and aluminum for another based on the home's architecture, opening dimensions, desired appearance, product availability, and performance requirements.

Statewide Windows & Doors offers both vinyl and aluminum impact window options, allowing homeowners to compare products rather than being limited to a single frame material.

Verify the Exact Product Series on Your Quote

Knowing that your quote includes "ES Windows" or "CWS windows" is not enough.

Ask for the exact product series.

This matters because different series from the same manufacturer can have different:

• Frame designs
• Available sizes
• Window styles
• Glass options
• Hardware
• Performance characteristics
• Approvals
• Warranty terms

The product series gives you a much more useful starting point for comparing two proposals.

Verify the Window Style

Window style can also affect the comparison.

Depending on the manufacturer and series, homeowners may encounter:

• Single-hung windows
• Horizontal roller windows
• Casement windows
• Picture windows
• Fixed windows
• Architectural or specialty shapes

A casement window should not automatically be compared directly with a single-hung window simply because both use impact-resistant glass.

The products operate differently and may have different specifications.

Verify the Exact Glass Package

The words "impact glass" do not tell you everything about the glazing included in a quote.

Depending on the product, glass options may include:

• Laminated impact-resistant glazing
• Insulated configurations
• Low-E coatings
• Tints
• Other manufacturer-specific options

If one proposal includes a different glass package from another, that can affect both the product characteristics and the quote.

Ask each contractor to identify exactly what glass configuration is included.

What Does Low-E Mean?

Low-emissivity, or Low-E, coatings are designed to influence how certain types of energy pass through glass.

Low-E options may be relevant for Florida homeowners concerned about solar heat and energy performance.

However, homeowners should not assume every ES or CWS quote automatically includes Low-E glass.

Verify the specific glass package.

Compare Energy-Performance Information

If energy performance is important to you, compare the actual specifications associated with the products being proposed.

Do not rely solely on general statements such as "energy efficient."

Window performance can be affected by:

• Glass configuration
• Coatings
• Frame construction
• Window style
• Size
• Installation

Your windows are also only one part of the home's overall energy performance.

Verify the Product Approval

Product approval is one of the most important technical details to verify when comparing Florida impact window quotes.

Do not assume that a product is appropriate for your home simply because the manufacturer sells impact-resistant windows.

The specific product and configuration proposed for the project should be appropriate for its intended application.

Ask the contractor to identify the applicable product approval associated with the quoted product.

Why the Approval Number Matters

An approval number can help identify the specific approved product documentation associated with a window or door system.

Depending on the approval, the documentation can contain information involving:

• Product type
• Configurations
• Maximum dimensions
• Glass options
• Design pressures
• Anchoring
• Installation requirements
• Limitations of use

That information is much more useful than simply being told that a product is "Florida approved."

ES and CWS Products in Miami-Dade and Broward County

Miami-Dade and Broward County are located within Florida's High-Velocity Hurricane Zone, commonly called the HVHZ.

For applicable projects in these areas, homeowners should verify that the exact product and configuration proposed is approved for its intended HVHZ application.

This applies regardless of whether the manufacturer is ES, CWS, or another company.

Miami-Dade NOA vs. Florida Product Approval

Florida homeowners may encounter both Miami-Dade Notices of Acceptance and Florida Product Approvals while reviewing impact products.

A Miami-Dade NOA is one recognized product-approval pathway.

Qualifying Florida Product Approvals specifically approved for HVHZ use may also apply.

A generic Florida Product Approval should not automatically be interpreted as approval for every HVHZ application.

The key question is whether the specific product and configuration is approved for its intended application.

Verify the Window Size and Configuration

Approval and performance information can depend on the dimensions and configuration of the window.

This is particularly important for unusually large openings.

A product appropriate for one opening is not automatically appropriate for every other opening in the home.

Your contractor should evaluate the actual openings before final products are ordered.

Why Design Pressure Matters

Windows experience positive and negative wind pressures during severe weather.

The appropriate requirements depend on the property and specific opening.

Factors associated with the building and its location can affect which product configurations are appropriate.

This is another reason homeowners should avoid choosing between ES and CWS based only on appearance or brand reputation.

Compare the Frames

Look closely at the actual frame systems included in the proposals.

Consider:

• Frame material
• Frame profile
• Available colors
• Appearance from inside the home
• Appearance from outside the home
• Maintenance recommendations
• Available configurations

If possible, review physical samples before making a final decision.

Compare the Hardware

Hardware can affect both appearance and everyday operation.

Depending on the window style, this can include:

• Locks
• Handles
• Operators
• Rollers
• Other moving components

Ask what hardware is included with each quoted product and whether different finishes or options are available.

Compare Screens

Screens may seem like a minor detail during a large impact window project, but homeowners should still understand what is included.

Ask:

• Are screens included?
• Which windows receive screens?
• What type of screen is provided?
• How are replacement screens handled?

Small differences in a quote can matter once the products are installed and used every day.

Compare the Warranty

Do not assume ES and CWS warranties are identical.

Warranty coverage can vary by manufacturer, product, component, location, and other conditions.

Before purchasing, review the current warranty applicable to the exact product being quoted.

Questions to ask include:

• What components are covered?
• How long does coverage last?
• What exclusions apply?
• Are there maintenance requirements?
• Are coastal properties subject to additional conditions?
• Is labor included?
• How are warranty claims initiated?

Manufacturer Warranty vs. Contractor Warranty

Homeowners should also understand the difference between product coverage and installation coverage.

The manufacturer may provide a warranty covering certain aspects of the window itself.

The installation contractor may provide separate terms relating to workmanship.

Ask for both before signing the contract.

Who Is Actually Installing the Windows?

Manufacturer selection receives a lot of attention, but the company responsible for installation is equally important.

Before signing a proposal, ask:

• Who will perform the installation?
• Who manages the project?
• Who handles permitting?
• Who coordinates inspections?
• Who handles service after installation?
• Who should I contact if there is a problem?

A recognizable window manufacturer does not replace the need to research the contractor responsible for your project.

Why Installation Matters

An impact window is a complete system that needs to be installed according to the requirements applicable to the product and project.

Installation can involve:

• Removing existing windows
• Preparing the openings
• Positioning the new products
• Anchoring
• Alignment
• Sealant and perimeter details
• Hardware adjustment
• Finishing work

The exact process depends on the product and property.

Who Handles the Permit?

Window replacement projects may require permits through the applicable local building jurisdiction.

Before signing the contract, determine who is responsible for:

• Preparing permit documentation
• Submitting the permit application
• Providing product approval information
• Responding to permit corrections
• Coordinating inspections
• Handling permit closeout

These responsibilities should be clear before the project begins.

Compare the Installation Scope, Not Just the Windows

Two contractors can quote the same manufacturer and still provide different overall project scopes.

Compare whether the proposal includes:

• Removal of existing windows
• Disposal
• Installation
• Permit handling
• Inspections
• Interior finishing
• Exterior finishing
• Cleanup
• Service
• Warranty support

The lowest product price does not automatically mean the lowest total project cost or the most complete proposal.

ES Windows Reviews: What Should Homeowners Look For?

Online reviews can help homeowners understand customer experiences, but they should be evaluated in context.

Instead of focusing only on an overall rating, look for recurring comments about:

• Product operation
• Installation
• Communication
• Project timing
• Service
• Warranty handling

Also remember that reviews may discuss the manufacturer, dealer, installer, or a combination of those parties.

Make sure you understand which company the reviewer is actually describing.

Are CWS Windows Good?

CWS is an established manufacturer homeowners may encounter while shopping for Florida impact windows, but whether a particular CWS window is a good fit depends on the specific product and project.

Rather than relying on a simple yes-or-no answer, evaluate:

• The exact CWS series
• Frame material
• Glass configuration
• Window style
• Opening dimensions
• Product approval
• Design requirements
• Warranty
• Installation contractor

Those details provide a much stronger basis for a purchasing decision.

Should You Choose ES or CWS Based on Price?

Price matters, but it should not be evaluated without understanding what is included.

A difference in price may reflect differences in:

• Frame material
• Product series
• Glass package
• Window styles
• Opening sizes
• Hardware
• Installation scope
• Permitting
• Finishing work
• Warranty

Compare the proposals line by line before concluding that one product or contractor is more expensive than another.

Ask for a Window Schedule

For projects involving multiple windows, a detailed window schedule can make quotes easier to understand.

Depending on the project documentation, the schedule can help identify information such as:

• Opening number
• Window type
• Dimensions
• Product or series
• Glass option
• Configuration

This can make it easier to confirm that the products ultimately ordered match the project you agreed to purchase.

Do Not Assume Every Window in the House Must Be the Same Product

Different openings can have different requirements.

A home may contain:

• Small bedroom windows
• Large living-room windows
• Bathroom windows
• Fixed architectural glass
• Sliding glass doors
• Entry doors

The contractor should evaluate the complete project and identify appropriate products for each opening.

What About Impact Doors and Sliding Glass Doors?

If your project includes more than windows, manufacturer selection becomes even more important.

The best window product for the project does not necessarily mean every door must come from the same manufacturer.

Statewide Windows & Doors also provides impact doors and impact sliding glass doors.

Homeowners can evaluate the complete exterior-opening project rather than limiting the decision to one brand.

ES vs. CWS Quote Comparison Checklist

Before deciding between two proposals, compare the following:

1. Exact manufacturer
2. Exact product series
3. Vinyl or aluminum frame
4. Window style
5. Opening dimensions
6. Impact glass configuration
7. Low-E or other glass options
8. Frame color and finish
9. Hardware
10. Screens
11. Applicable product approval
12. Design requirements
13. Permit handling
14. Installation scope
15. Interior and exterior finishing
16. Manufacturer warranty
17. Contractor workmanship coverage
18. Post-installation service
19. Total project price

Red Flags When Comparing Impact Window Quotes

Homeowners should ask additional questions if a proposal:

• Does not identify the manufacturer
• Does not identify the product series
• Does not explain the glass package
• Uses vague descriptions such as only "hurricane window"
• Does not explain permit responsibilities
• Does not identify what installation work is included
• Does not provide warranty information
• Makes absolute claims that a product is "hurricane-proof"
• Promises guaranteed insurance savings

A clear proposal should make it possible to understand what you are purchasing.

How Statewide Windows & Doors Helps Homeowners Compare Products

Statewide Windows & Doors works with Florida homeowners to compare impact window and door products based on the actual needs of the property.

Rather than choosing solely by brand name, homeowners can evaluate:

• Vinyl and aluminum options
• Window styles
• Opening dimensions
• Glass packages
• Product configurations
• Applicable approvals
• Design requirements
• Appearance
• Budget

Statewide provides impact windows, impact doors, and impact sliding glass doors for Florida homes.

Why Choose Statewide Windows & Doors?

Choosing an impact product is only one part of the project.

Measurements, product selection, permitting, installation, inspections, project management, and post-installation service can all affect the homeowner experience.

Statewide Windows & Doors has more than 25 years of combined industry experience helping Florida homeowners with window and door projects.

Homeowners can review completed projects, explore impact window and door manufacturers, review Statewide service areas, or contact Statewide Windows & Doors to discuss available products for their home.

Final Words

ES Windows and CWS are both manufacturers Florida homeowners may encounter while shopping for impact windows, but the manufacturer's name should be the beginning of the comparison rather than the end of it.

Verify the exact product series, frame material, window style, glass package, dimensions, product approval, design requirements, warranty, installation scope, and contractor before making a decision.

An ES product may make sense for one home or opening, while a CWS product may make sense for another.

The goal is not to find a universal winner between two manufacturers. The goal is to identify an impact window system that fits your property, project requirements, design preferences, and budget—and to understand exactly what your contractor is proposing before you sign the agreement.