Vinyl windows usually insulate better than aluminum and need less upkeep, which makes them the better choice for most homes. Aluminum windows are stronger and can use slimmer frames, so they suit large openings and modern designs. With either material, compare the whole window's NFRC ratings rather than going by the frame alone.

The Window Depot carries both vinyl and aluminum windows at its stores in Tucson, Phoenix, Chandler, Surprise, El Paso, Albuquerque and National City. This guide compares the two materials so homeowners and contractors can choose the right fit for each project.

What's the Difference Between Vinyl and Aluminum Windows?

The difference is the frame. Vinyl windows have frames made of PVC, which often have hollow chambers inside. Aluminum windows have metal frames. That one change affects how the window insulates, how strong it is and how it looks.

Are Vinyl Windows More Energy Efficient Than Aluminum?

In most cases, yes. According to the U.S. Department of Energy, vinyl frames provide more thermal resistance than metal frames. Aluminum conducts heat easily, so a basic aluminum frame lets more heat pass through.

The frame is only one part of the window's performance, though. The glass, coatings, spacers and seals all affect how well a window insulates. A well-built aluminum window can outperform a poorly built vinyl one.

What Is a Thermal Break in an Aluminum Window?

A thermal break is a strip of insulating material placed between the inner and outer parts of an aluminum frame. It interrupts the path heat would otherwise travel through the metal. The Department of Energy recommends thermal breaks for metal frames, so if you're considering aluminum, ask whether the frame has one.

Which Is Better for Hot Climates Like Tucson and Phoenix?

Vinyl has an edge in desert heat because the frame doesn't carry heat into the house the way bare aluminum does. In hot, sunny places like Tucson, Phoenix, El Paso and Albuquerque, though, the glass usually matters more than the frame.

Pay attention to the Solar Heat Gain Coefficient (SHGC), which measures how much of the sun's heat comes through the glass. A lower SHGC keeps more heat out. That's especially helpful on west- and south-facing walls. ENERGY STAR sets SHGC and U-Factor requirements by climate zone, so check the requirements for where you live. Our guide on energy efficient windows for hot climates goes into more detail.

What About Coastal Homes in National City?

Salt air near the coast can be hard on metal. If you choose aluminum windows for a home in National City, look for a durable factory finish and check the frames for coating damage from time to time. Vinyl frames resist moisture and won't corrode, although the metal hardware on any window should still be inspected.

Which Is Stronger, Vinyl or Aluminum?

Aluminum is stronger. That strength lets manufacturers build slimmer frames that hold large panes of glass, which is why aluminum is popular for big picture windows and contemporary homes.

Vinyl is less rigid, but it's plenty strong for most standard home windows. For a very large opening, talk with a qualified professional about structural requirements before you pick a frame material.

Which Material Looks More Modern?

Aluminum's thin frames give a clean, contemporary look and let more glass show. Vinyl frames are a bit wider and fit well with traditional and transitional homes. A modern desert home may suit aluminum, while a classic ranch-style house often looks right with vinyl.

Which Is Easier to Maintain, Vinyl or Aluminum?

Vinyl usually takes less work. It never needs painting and holds up well to moisture. Aluminum is also low maintenance, especially with a factory-applied finish, but it's worth checking now and then for scratches or coating damage.

Neither material needs the regular painting that wood windows do.

Which Costs Less, Vinyl or Aluminum Windows?

Vinyl windows generally cost less upfront than aluminum windows. The final price depends on the size, style and glass package of the window you choose. Larger and custom windows cost more no matter which material you pick.

How Do You Choose Between Vinyl and Aluminum Windows?

Start with what matters most for your home.

Vinyl may be the better fit if:

• You're replacing standard-size windows
• Insulation and low maintenance are your top priorities
• You want to keep upfront costs down

Aluminum may be the better fit if:

• You have large openings or want a lot of glass
• You prefer slim frames and a modern look
• You're matching existing aluminum windows elsewhere in the house

Then compare the specific products by their NFRC label ratings, including U-Factor, SHGC and air leakage.

For contractors: On whole-house jobs, you don't have to use one material everywhere. Vinyl for the standard openings and aluminum for a large feature window can be a practical mix, as long as the finishes look good together.

If you're replacing a patio door at the same time, our guide to the difference between vinyl and aluminum sliding doors covers the same choice for doors.

Frequently Asked Questions About Vinyl vs Aluminum Windows

Are vinyl or aluminum windows better?

For most homes, vinyl is the better choice because it insulates well and needs little upkeep. Aluminum is often the better fit for large openings and modern designs that call for slim frames.

Are aluminum windows more durable than vinyl?

Aluminum is stronger, but both can last for many years when they're well made and properly installed. How long they last depends on product quality, climate exposure and maintenance.

Are vinyl windows cheaper than aluminum?

Generally, yes. Vinyl usually costs less upfront, though size, style and glass options affect the price of either one.

Which window material is best for desert heat?

Vinyl frames resist heat flow better than standard aluminum. In hot climates, though, the glass's SHGC rating usually has the biggest effect on how much heat comes in.

Do aluminum windows need a thermal break?

A thermal break isn't required, but it improves how well an aluminum frame insulates. If energy performance matters to you, look for aluminum windows with thermally broken frames.

Compare Vinyl and Aluminum Windows at The Window Depot

See vinyl and aluminum windows side by side at The Window Depot in Tucson, Phoenix, Chandler, Surprise, El Paso, Albuquerque and National City. The staff can help you compare frame options and NFRC ratings for your project. Browse vinyl windows online, or find your nearest store.