Aluminum and vinyl are two materials commonly used in commercial windows projects, and yet, none of them is universally fit for all buildings. The choice of aluminum vs. vinyl commercial windows depends on the following factors: type of building, size and design of the window, wind exposure, thermal properties requirements, maintenance expectations, budget, and historic or code-related limitations of the building.

In this article, we discuss the differences between aluminum and vinyl commercial windows, applications where each of them performs better, and factors which are supposed to determine which window system you should choose. Note, however, that there will be no definite winner in the aluminum vs. vinyl commercial windows debate.

Aluminum vs. Vinyl Commercial Windows: What Are the Differences?

As a general rule, aluminum frames for commercial windows are usually made of metal and are valued for their high strength and thinness and ability to create unique designs, while vinyl frames are made of plastic (PVC) and are valued for low maintenance and moisture resistance.

So, here are the key features of the two materials:

Frame composition

Aluminum frames are metal frames and they are created through extrusion. Vinyl frames are plastic and they are usually made through extrusion too, but they need thicker walls to maintain the rigidity.

Typical applications

Aluminum commercial windows are used in storefronts, curtain walls, institutional buildings and in heavy multifamily constructions. Vinyl commercial windows are used in light commercial buildings and multifamily renovation projects.

A good starting point is the idea that aluminum is preferred when strength, durability, commercial-grade requirements and bigger configurations are important. But again, this is only a starting point, since each project is unique and vinyl windows may be the best fit for a number of buildings.

Aluminum vs. Vinyl Commercial Windows Comparison

Factor	Aluminum	Vinyl
Material	Extruded aluminum	Extruded PVC
Structural strength	Higher strength-to-weight ratio	Lower structural capacity
Typical commercial applications	Storefronts, curtain walls, institutional, heavy multifamily	Multifamily renovation, light commercial
Large window configurations	Well suited to larger spans and glass areas	Generally limited to smaller/standard configurations
Thermal performance	Depends heavily on thermal breaks and glazing	Naturally lower frame conductivity
Maintenance	Low; occasional finish/hardware attention	Low; no painting required
Durability	Strong under structural stress and heavy use	Resists moisture/corrosion; sensitive to extreme heat in some cases
Design flexibility	Wide range of profiles, shapes, custom configurations	More limited profile and shape options
Color/finish options	Broad range of finishes and colors	Narrower range, typically integral color
Installation considerations	Can support larger, heavier units; often requires structural coordination	Generally lighter and simpler for standard-size installations
Historic building compatibility	Slim profiles suit historic sightline replication	Used in some renovation contexts, less common for detailed replication
Cost considerations	Varies by size, finish, and customization	Varies by size and configuration
Expected project life	Depends on product quality, exposure, and maintenance	Depends on product quality, exposure, and maintenance
Energy-efficiency considerations	Requires thermal breaks and glazing selection to perform well	Frame contributes lower conductivity; overall performance still depends on glazing
Best-fit project conditions	Large openings, heavy-commercial use, historic replication, custom sizing	Standard-sized multifamily renovation, budget-conscious low-maintenance projects

No single row in the above table can serve as a definitive factor in deciding which material you should choose. The right combination of factors will help you make this decision based on specific requirements of your building.

Advantages of Aluminum Commercial Windows

• Strength and Structural Performance

Higher strength-to-weight ratio is the characteristic of aluminum which is responsible for aluminum’s use in many commercial windows. This material can provide structural support for larger areas of glass and heavier windows with a relatively thin frame.

• Design Flexibility

Since aluminum extrusions are easy to form into various shapes and the aluminum material can be provided with a wide range of finishes and colors, aluminum is often used in projects requiring custom configurations and unusual shapes, including Custom Window Fabrication projects.

• Durability

Since aluminum commercial windows withstand wear and tear and stress, they can be successfully used in commercial buildings with high traffic and wind load or thermal load. However, durability also depends on product quality and maintenance.

• Commercial and Multifamily Applications

Aluminum is usually considered for the following projects:

• Projects requiring larger window units.
• Commercial projects requiring storefront and curtain wall windows.
• Multi-story multifamily buildings where wind load matters.
• Heavy multifamily buildings.

Again, the material you use doesn’t necessarily depend on the type of the building – other factors should play an important role as well.

Advantages of Vinyl Commercial Windows

• Thermal Characteristics

Since the vinyl material has naturally low thermal conductivity, vinyl commercial windows have a naturally low conductivity too. That said, frame material is not the only parameter affecting the performance of the window as a whole, because the glazing selection and installation are also extremely important.

• Low Maintenance

The fact that vinyl commercial windows do not need to be painted and they do not corrode is an important advantage, which is why vinyl is often chosen for renovation programs on multifamily buildings where maintenance is important.

• Cost Considerations

Vinyl may be attractive in terms of cost, since it is usually associated with lower manufacturing and installation cost. However, cost depends on the complexity of the project – larger units, custom configurations and higher quality glazing packages can increase the price.

• Multifamily and Renovation Applications

Here are the projects which can be implemented with the use of vinyl windows:

• Replacement program on standard-sized multifamily units.
• Renovation project where low maintenance is important.
• Commercial building with existing vinyl installations which should be replicated.

In either case, the complete commercial window system consists of not only a frame but glazing package and hardware as well.

Aluminum vs. Vinyl Windows: Energy Efficiency

When it comes to energy efficiency of commercial windows, the material of the frame does not play a decisive role, and yet, it is important. There are several other factors that also affect the energy performance of the window system.

Key performance metrics and components include:

• U-factor

U-factor — measure of heat resistance. Lower numbers correspond to better performance.

• Solar Heat Gain Coefficient (SHGC)

Solar Heat Gain Coefficient (SHGC) — how much solar heat passes through the window. Targeted number depends on climate and building location.

• Low-E glass

Low-E glass — a layer which increases thermal insulation of the window without blocking sunlight.

• Insulating glass units (IGUs)

Insulating glass units (IGUs) — sealed units with multiple panes (usually filled with argon) which provide increased insulation due to reduced heat transfer between glass panes.

• Thermal break

Thermal break — layer of insulation between inner and outer parts of the aluminum frame which reduces heat transfer through the frame.

• Frame performance

Frame performance — heat resistance of the frame itself which differs a lot between old and modern thermally-broken aluminum.

• Glass-to-frame ratio

Glass-to-frame ratio — ratio of the glass area to the frame area which means that larger glass area shifts more thermal responsibility on the glazing.

• Installation quality

Installation quality — proper sealing, flashing and water/weatherproofing of the window opening which may undermine the performance of the window even if it is properly specified.

It is incorrect to assume that vinyl commercial windows are always more energy-efficient. Old aluminum windows without a thermal break can be less energy-efficient than vinyl windows. However, modern aluminum windows with thermal break and modern glazing can perform differently. Thus, the only way to compare the two is to analyze the U-factor and SHGC ratings for the whole assembly and not just the frame material.

Aluminum vs. Vinyl Commercial Windows: Cost Factors

While it is hard to estimate the cost of either aluminum or vinyl commercial windows in advance since the price usually depends on:

• Size and quantity of the windows
• Frame material and finish
• Glazing package and thermal performance requirements
• Level of customization or Custom Window Fabrication required
• Hardware selection
• Installation method and complexity
• Existing opening conditions
• Height of the building and access conditions
• Labor costs for the region and specific project
• Existing window removal and disposal
• Flashing and waterproofing details
• Complexity of the project, including historic aspects

Total cost of the project is not determined by its lowest bid. A low bid which does not include flashing and sealant details, uses thin glazing package and underestimates existing condition repair may lead to change orders and additional costs. Thus, comparing different quotes according to the specification of the project is the more reliable approach to choosing the contractor.

Which Material Is More Durable: Aluminum or Vinyl Commercial Windows?

While both aluminum and vinyl are durable materials, actual durability depends not so much on the material itself but on product quality, environmental conditions and installation.

The factors which determine the durability of the window include:

• Exposure and climate. Different exposure and climatic conditions exert different pressures on aluminum and vinyl.
• UV exposure. UV exposure may affect color and finish of both materials in the course of time.
• Moisture. Vinyl is moisture-resistant and aluminum can be used in moist environment with proper coating.
• Window size. Bigger windows impose structural demands on hardware and the frame and, therefore, aluminum may be better suited for larger windows.
• Hardware. Regardless of the frame material, hardware wears with time and quality of hardware may play a greater role than frame quality.
• Installation. Improper installation may reduce the effective lifespan of any window.
• Maintenance. Proper seals, weatherstripping and operation of hardware prolong lifespan.
• Quality of the product. Quality of the product itself plays a big role – a high quality vinyl window system can outperform a low quality aluminum system and vice versa.

Since the above list includes several variable factors, it is impossible to give any guaranteed number of years which either aluminum or vinyl windows can last. The question to ask instead is whether the specific product is specified properly for the building.

Aluminum vs. Vinyl Commercial Windows for Multifamily Buildings

Multifamily projects present unique challenges:

• Number of units. Replacement of windows on dozens or hundreds of units adds certain complexity to the project.
• Occupied building. Occupancy means that residents need to stay in the building throughout the project.
• Resident disruption. Noise, dust and access conditions need to be taken into account in the occupied building.
• Repeated window configurations. Multifamily building usually have many identical openings which simplifies the project in some aspects.
• Energy performance. Whole-building energy savings can be achieved on a large scale through window replacement.
• Noise. Glazing can influence sound insulation of the windows, and this issue is important in multifamily buildings in proximity to noisy locations.
• Maintenance. Low maintenance expectations mean that materials which require minimal maintenance can be better suited for the project.
• Installation scheduling. Scheduling of the installation requires coordination with property management.
• Logistics of the material. Material delivery on a large multifamily project requires additional coordination.
• Appearance. Appearance consistency across the building facade is important for the property owner and residents.

Replacement of windows in multifamily buildings is usually a complex project which requires coordination between property management, residents, contractors, suppliers and installers. Choosing between aluminum and vinyl is only one aspect of such a complex project.

Aluminum vs. Vinyl Commercial Windows for High-Rise Buildings

Here are the factors associated with high-rise buildings:

• Wind exposure. Exposure to wind increases with the building height and, therefore, imposes special requirements on structural strength of the window system.
• Building height. Higher building requires engineering analysis of the window system.
• Structural requirements. Larger or heavier windows may require structural coordination with the building’s framing.
• Waterproofing. Wind-driven rain at height requires special flashing and waterproofing details.
• Air leakage. Wind pressure differentials at height may influence air leakage.
• Thermal performance. Thermal performance requirements may be imposed by whole-building energy performance targets.
• Installation logistics. Special installation equipment is required.
• Access. Access methods need to be planned considering the building specifics.
• Safety. Safety precautions need to be taken considering the building height.
• Product specifications. Window system needs to be designed according to the building specifications and not general catalog listings.

Neither aluminum nor vinyl is a correct material for all high-rises. It depends on whether the material has been engineered and tested for the wind loads, water pressure and structural conditions of that particular building.

Which Material Is Better for Historic or Older Buildings?

Here are some additional factors specific to historic or old buildings:

• Existing window dimensions. Original dimensions of the opening do not correspond to the stock sizes and custom sizing becomes necessary.
• Architectural details. Original sightlines, muntin patterns and window frame profiles need to be replicated.
• Historic district requirements. Some buildings may be subject to review by a historic district commission and the requirements differ from one another greatly.
• SHPO requirements. If there are State Historic Preservation Office requirements related to the material, appearance and replication, these should be verified by the SHPO itself.
• Masonry and existing framing. Existing framing may limit the possible modification of the opening.
• Energy upgrades. Modern energy efficiency needs to be balanced with preservation requirements.
• Customization. Since original dimensions of the opening do not correspond to stock sizes, Custom Window Fabrication is usually a part of the historic replacement project.

Material selection on historic projects depends on project specifics rather than preferences. Aluminum can replicate sightlines better, while vinyl is sometimes preferred on multifamily historic adjacent buildings where the goal is to replicate the existing installation.

How Fenestration Design and Engineering Affects Material Selection

Choosing between aluminum and vinyl is not a catalog decision. In contrast, professional fenestration design and engineering services are usually based upon the following criteria:

• Building Height and Wind Loading Requirements
• Building Orientation and Solar Exposure
• Thermal Zoning for Different Façades
• Fire-Rating Requirements if Relevant
• Egress Requirements for Operable Windows
• Accessibility Requirements
• Energy Code Requirements
• Existing Structural Conditions
• Occupancy Type and Purpose
• Installation Conditions at the Project Site

The approach behind AA Window & Door’s Design and Engineering services includes addressing all these criteria during projects involving specification development, product selection and installation methods and details, but not material choice as a standalone decision, based on the catalog of products. In cases where custom sizing, historical replication or high-rise construction requirements are involved, engineering coordination takes precedence over frame material choice.

Commercial Window Experience and Project Examples: AAWD Inc.

Since 1994, American Architectural Window & Door Inc. has been providing its expertise for commercial, multifamily, renovation, adaptive reuse and occupied building window projects in the Tri-State Area. The following project examples from the company’s experience show how building-specific criteria are the determining factors of actual specification, and not the fixed material preference:

• Hillside Gardens – AAWD installed more than 2,200 heavy-commercial aluminum energy-efficient double-hung windows with Low-E glazing and argon gas fill, in the occupied multifamily property.
• Wellington Woods – AAWD replaced the existing vinyl windows with new white vinyl double-hung windows within the multifamily replacement program.
• Martin Gerber Apartments – AAWD supplied and installed custom-sized bronze aluminum heavy-commercial slider windows with the energy-efficient glazing package.
• Picatinny Arsenal Building 93 – AAWD replaced existing aluminum windows with 235 heavy-commercial aluminum fixed windows and specialty privacy glazing.

The above-listed projects should not be taken as an indication of any fixed preference to either material. While Hillside Gardens and Martin Gerber Apartments used aluminum for different reasons related to building’s size and other structural requirements and finish specifications, Wellington Woods used vinyl to fit into the multifamily replacement program. In each case, the choice of material follows the building’s specific characteristics and owner’s objectives, as it is worth doing for any commercial or multifamily window decision.

How to Choose Aluminum or Vinyl Commercial Windows?

Here is what you should address with the help of your architect, contractor or fenestration window specification partner:

• What is the building type? Commercial, institutional, and multifamily buildings have different structural and code requirements.
• What are the sizes of window openings? Large openings are more likely to require aluminum system due to its higher structural capacity.
• Is it an occupied building? Occupied buildings require special installation schedule and coordination with residents regardless of the material.
• What are the wind load requirements? Higher wind exposure will demand aluminum systems specifically engineered for it.
• What thermal requirements do you have? The energy code or owner’s objective may set the minimum U-factor or SHGC levels.
• Do you have historic preservation requirements? It may severely limit material and appearance options.
• What glazing package do you require? Glazing affects energy performance as much as frame material, thus this point should be addressed before material choice.
• What maintenance requirements do you have? This requirement may shift the material choice in one direction or another.
• What is the project budget? The total cost of the project, not the material itself, should guide the decision.
• What are the installation conditions? Building height and existing conditions affect feasibility and cost of any material equally.
• What local codes do you have? They may vary depending on location and building type.
• Do you have existing opening requiring custom sizing? You will need Custom Window Fabrication regardless of the material chosen.

For architects, contractors, building owners and facility managers the above-listed points represent the starting checklist before requesting quotes. Thus, you will limit the possible materials and configurations before cost comparison becomes even a possibility.

Mistakes in Choosing Commercial Window Material

• Choosing material based on upfront cost rather than the total project cost.
• Comparing frame materials without comparing the whole glazing and hardware assembly.
• Neglecting existing opening conditions before finalizing the product selection.
• Disregarding installation quality as the element of overall performance.
• Ignoring how much glazing specification influences energy performance.
• Disregarding wind-load requirements, especially on the tall buildings.
• Overlooking historic preservation or landmark requirements.
• Selecting the product before the engineering review of building.
• Overlooking how much logistics and coordination is needed for occupied building projects.

FAQs Regarding Aluminum vs. Vinyl Commercial Windows

Which material is better for commercial buildings: aluminum or vinyl?

Neither one is categorically better for commercial buildings. Usually, aluminum is used in commercial applications of larger, heavier or custom configurations, while vinyl fits smaller, standard-sized, light-commercial applications better.

What is the main difference between aluminum and vinyl commercial windows?

Aluminum commercial windows feature metal frames with higher structural capacity and design versatility. Vinyl commercial windows feature PVC frames with lower maintenance and moisture resistance, but generally lack the structural capacity for large openings.

Are aluminum commercial windows more durable than vinyl?

No, aluminum does not necessarily mean higher durability, since it is more dependent on the product quality, installation and exposure conditions.

Are vinyl commercial windows more energy-efficient than aluminum?

Not necessarily. Vinyl has lower conductivity of its frames, but modern thermally broken aluminum systems with high-performing glazing can perform similarly to them in terms of energy efficiency.

Are aluminum windows good for multifamily buildings?

Yes, aluminum is usually applied to larger or heavier window configurations or where custom sizing and particular finish is required.