When you shop for replacement windows, you may start by thinking about window style or glass. But the frame is also important. The material you choose can affect not only how your windows look, but also how they hold up over time.
The main types of window frame materials include Fibrex® composite material, vinyl, wood, aluminum, fiberglass, wood-clad, other composites, steel, and cellular PVC. Each handles daily wear differently. Some also need more upkeep than others.
Here is how nine window frame materials compare for longevity.
A durable window frame needs to handle the conditions around your home. Those conditions can vary based on where you live and where a window is located.
Several factors can affect how well a frame holds up over time:
The quality of the complete window also factors into how long it lasts. Even a strong frame needs to be properly fitted and installed. That is why it is better to compare the whole window rather than choose a material based on one feature.
You will find many frame materials when shopping for replacement windows. Some are common in homes across the country. Others tend to be used for certain designs or applications.
Here is what sets each one apart.
Fibrex® material is Andersen’s exclusive composite material. It combines wood fiber with thermoplastic polymer.
The result is a strong, stable material that resists decay. Fibrex® material also offers low-maintenance performance. It does not need the regular scraping and painting that traditional wood may require.
Fibrex® is different from standard vinyl. It is also more specific than the general term “composite,” which can describe many different combinations of materials.
Vinyl windows are a common choice for homeowners. They tend to be affordable and need little routine maintenance. You do not have to paint vinyl frames, and cleaning is usually simple.
Temperature changes can cause vinyl to expand and contract. How
Not all vinyl windows are made the same way. If you are comparing vinyl windows, look at the quality and construction of the complete window rather than the frame material alone.
Wood window frames have a warm, traditional appearance. They can work well with many home styles and offer plenty of design options.
Moisture is an important concern with wood. Repeated exposure can lead to deterioration or rot if the material is not properly protected.
Wood may also require more upkeep than many low-maintenance materials. Depending on the product and its finish, that could include painting, staining, or refinishing to protect the surface.
Aluminum is strong without being very heavy. That strength can support narrow frames and larger areas of glass. It also will not rot like wood.
However, aluminum conducts heat more readily than many other frame materials. Some aluminum windows use thermal breaks to help reduce heat transfer through the frame.
Exterior finishes also matter. The right finish and corrosion protection can be especially important in humid, coastal, or other demanding environments.
Fiberglass windows are known for being dimensionally stable. This means the material experiences relatively little expansion and contraction as temperatures change.
Fiberglass also has lower thermal conductivity than standard aluminum. This can make it a good insulating material.
These frames generally need minimal maintenance, and some can be painted. However, there is no single lifespan that applies to all fiberglass windows. Construction quality, installation, climate, and care still play a role in how long a window performs.
Wood-clad windows combine wood with another material on the exterior. Aluminum is one material that may be used for the cladding.
This design can give you the appearance of wood inside your home while helping protect the exterior from weather.
The cladding itself is only part of the picture. Joints, seals, construction quality, and maintenance can all affect how well a wood-clad window holds up over time.
“Composite” does not refer to one specific window material. Composite window frames can be made from different combinations of materials.
As a result, their durability and maintenance needs can vary. Their thermal performance can vary, too. Fibrex® is one type of composite material.
Steel is very strong. That strength can make narrow frames possible while still supporting large areas of glass. Steel frames can also create a distinctive look that works well with certain architectural styles.
Steel is less common in typical residential replacement projects than vinyl, wood, fiberglass, or composite materials.
Because steel can corrode, protective coatings are an important part of its long-term performance.
Cellular PVC is another material you may encounter when researching windows. It is not the same as a standard hollow vinyl frame.
Cellular PVC is designed to resist moisture and provide low-maintenance performance. However, products can differ in how they are made.
As with vinyl windows and other frame types, look beyond the material name. The design and construction of the complete window also matter.
There is no one lifespan that applies to every frame material. The most durable choice for your home depends partly on what conditions your windows will face.
For example, moisture protection is especially important for wood. Corrosion protection matters for steel. Dimensional stability can be important in places with large temperature swings.
Maintenance is another consideration. If you do not want to regularly paint, stain, or refinish your frames, a low-maintenance material may be a better fit.
Here is a quick comparison:
| Material | Maintenance | Primary Longevity Consideration |
|---|---|---|
| Fibrex® | Low | Strength, stability, and resistance to decay |
| Vinyl | Low | Product quality and thermal movement |
| Wood | Higher | Protection from moisture |
| Aluminum | Low to moderate | Finish and corrosion protection |
| Fiberglass | Low | Dimensional stability |
| Wood-clad | Moderate | Cladding, joints, and seals |
| Composite | Varies | Material formulation |
| Steel | Moderate | Corrosion protection |
| Cellular PVC | Low | Product formulation and construction |
When comparing durable window frames, also look at the complete window, installation, and warranty.
Yes. Your frame can play a role in the energy efficiency of your windows.
Some materials transfer heat more easily than others. Standard aluminum, for example, conducts heat more readily than fiberglass. Aluminum frames may use thermal breaks to reduce heat transfer.
But the frame is only one part of an energy-efficient window. Low-E coatings can reduce heat loss in windows, for instance.
If energy efficiency is a priority for your home, compare whole-window ratings. This gives you a better picture of performance than looking at the frame material or glass alone.
Andersen developed Fibrex® material, which Renewal by Andersen uses in its replacement windows. It combines the strength and stability of wood with the low-maintenance qualities of a thermoplastic polymer.
Fibrex® material resists decay. It also maintains its stability through temperature changes and does not require regular scraping and painting.
Renewal by Andersen custom-makes replacement windows for your home. Our team takes precise measurements, so your new windows are made for your existing window openings.
When your windows are ready, Certified Master Installers complete the installation. They follow a proven process designed to provide the right fit and help your new windows perform as intended.
This full-service approach means you do not have to choose a window and then find someone else to install it.
The best material for your window frame depends on your home and what matters most to you.
You do not have to sort through your replacement window choices on your own. Renewal by Andersen can help you find options that fit your home.
Our team can help you explore window styles and design choices. We can also help you choose glass options based on your needs.
Ready to explore your options? Schedule a free consultation with Renewal by Andersen to find replacement windows that work for your home.
