Wood windows use wood on both the interior and exterior. Wood-clad windows use wood on the inside and aluminum on the outside. Both are made with real wood. The difference is in how the exterior is protected. Wood-clad windows tend to need less upkeep on the outside. All-wood windows offer more flexibility for painting and finishing on both sides. The right choice depends on your home, your climate, and how much exterior maintenance you want to take on.
If you are shopping for replacement windows, you have probably come across both of these options. They can look similar in photos. They are both made with real wood. But they are built differently, and they behave differently over time.
This blog explains how wood windows and wood-clad windows compare. It covers how each is made, how they hold up in different climates, what maintenance looks like for each, and what to think about before you decide.
What Are All-Wood Windows?
All-wood windows use wood on both the interior and the exterior. Inside and out, you are looking at real wood.
This construction style has been around for a long time. It is a classic choice for homes where the exterior appearance matters as much as the interior. Wood can be painted, stained, or finished in nearly any color. That flexibility makes all-wood windows a common fit for historic homes, custom builds, and projects where matching existing woodwork is important.
Sierra Pacific all-wood windows use select-grade wood species and include CoreGuard Plus wood treatment as standard. CoreGuard Plus is a patented process that works to repel water and protect against pests and rot. It is applied to all wood species, not just pine. That protection is part of the product, not an upgrade.
The trade-off with all-wood windows is exterior maintenance. Wood exposed to the elements needs periodic attention. In wet climates like the Pacific Northwest or areas with heavy sun exposure like Arizona or Southern California, the exterior finish can wear over time. That is not a defect. It is the nature of wood on the outside of a home. Keeping up with that maintenance is part of owning all-wood windows.
What Are Wood Clad Windows?
Wood-clad windows combine a wood interior with an aluminum exterior. The inside of the window is wood. The outside is fully enclosed in extruded aluminum cladding that is powder-coated for durability.
The wood interior gives you the warmth and finish options that wood provides. You can paint or stain it to match your interior. The aluminum exterior handles weather exposure without requiring the same level of upkeep as bare wood.
Sierra Pacific’s aluminum cladding is extruded, not roll-formed. That distinction matters. Extruded aluminum is thicker and more structurally solid than roll-form alternatives. Sierra Pacific’s cladding is at least twice as thick as roll-form cladding used in comparable products. The exterior finish uses AAMA 2604 or 2605 powder coat, which are among the more durable exterior coating standards available.
Wood-clad windows are available in a wide range of exterior colors. Details about specific color options and warranty coverage vary by product line. Your Select Remodeler can confirm specifics.
How Does CoreGuard Plus Fit In?
Both product types use CoreGuard Plus wood treatment. This applies to all wood components that come into contact with exterior elements, cladding material, or glass.
CoreGuard Plus is a water-based treatment with nearly zero VOCs. It penetrates the wood to help resist moisture, warping, and rot. It also contains fungicides and insecticides to protect against pests. Sierra Pacific tests the treatment in a Hawaiian rainforest environment that simulates extended residential exposure.
For wood-clad windows, CoreGuard Plus protects the wood underneath the aluminum cladding. For all-wood windows, it protects all exposed wood components. In both cases, it is a standard part of the product.
Warranty details for CoreGuard Plus wood protection are outlined in the official warranty documentation. Your Select Remodeler can point you to the correct documents.
How Do They Compare in Different Climates?
Climate is one of the most practical factors in this decision.
In areas with significant moisture, like the Pacific Northwest or parts of Northern California, an aluminum-clad exterior reduces the amount of ongoing attention the outside of the window needs. The wood inside is protected. The aluminum outside handles the rain and humidity.
In drier climates like Arizona, New Mexico, or Utah, UV exposure is a bigger factor than moisture. Both all-wood and wood-clad windows can work well in these regions, but the aluminum exterior on clad windows is generally more resistant to sun-related fading and wear than a painted wood exterior. Powder coat finishes are designed for this kind of long-term exposure.
In mountain climates like Colorado or Montana, temperature swings are significant. Wood naturally expands and contracts with temperature changes. The combination of wood interior and aluminum exterior in wood-clad windows accounts for this. The cladding is designed to work with the wood underneath it, not against it.
Neither option is automatically better for every region. Your Select Remodeler can help you think through what makes sense for your specific home and location.
What Does Maintenance Look Like for Each?
This is one of the most common questions homeowners have, and it is worth being direct about.
All-wood windows require periodic exterior maintenance. The exterior wood finish, whether painted or stained, needs to be monitored and refreshed over time. How often depends on your climate, sun exposure, and the finish used. When kept up properly, all-wood windows can last a long time and look the way you want them to.
Wood-clad windows have a low-maintenance aluminum exterior. The powder-coated finish does not need to be painted or stained. Routine cleaning is typically enough on the outside. The wood interior still benefits from normal care, as any finished interior wood surface would.
Neither option is maintenance-free. Both reward attention. The difference is in where that attention is focused and how frequently it is needed.
Which One Is Right for My Home?
There is no single right answer. Both are real-wood products. Both are built to perform. The choice comes down to a few practical questions.
How much exterior upkeep do you want to take on? If you prefer a lower-maintenance exterior, wood-clad windows are worth a close look. If you want full control over the look and finish of both interior and exterior, all-wood windows give you that flexibility.
What does your home’s exterior look like? If you have existing wood trim or a historic home where matching the exterior finish matters, all-wood windows may be the easier fit. If your exterior is more straightforward and you want the outside of your windows to hold up without a lot of attention, clad makes sense.
What is the climate like where you live? Moisture, sun, and temperature all affect how wood performs on the outside of a home. Your region matters in this decision.
Your Select Remodeler can help you work through these questions based on your home and the specific product lines available to you. Details about product options, sizing, and warranty coverage depend on the product line and installer.
What Should I Do Next?
Start by thinking about your priorities. Interior warmth, exterior durability, maintenance expectations, and climate are all worth putting on paper before you talk to anyone.
When you are ready to have that conversation, a Select Remodeler can walk you through the specific options that fit your home. They work with Sierra Pacific products regularly and can help you compare what is available within each product line.
Take your time with this decision. Wood windows and wood-clad windows are both long-term investments. Understanding the difference between them is a good first step.
What is the difference between wood windows and wood-clad windows?
Wood windows use wood on both the interior and exterior. Wood-clad windows use a wood interior with an aluminum exterior. Both include real wood. The aluminum cladding on clad windows is designed to reduce exterior maintenance compared to an exposed wood exterior.
Do wood-clad windows still have real wood inside?
Yes. Wood-clad windows have a real wood interior that can be painted or stained to match your home. The exterior is enclosed in powder-coated aluminum cladding. The wood inside is also protected by CoreGuard Plus wood treatment, which is standard on Sierra Pacific products.
Which is better for wet or humid climates, wood or wood-clad windows?
This depends on the home, the specific product, and how much exterior maintenance a homeowner is willing to do. Wood-clad windows have an aluminum exterior that does not require the same level of ongoing attention as an exposed wood exterior in high-moisture environments. Your Select Remodeler can confirm what makes sense for your region and situation.
