Painting aluminum clad windows is an affordable way to refresh your home’s exterior without the cost of full window replacement. However, achieving a durable finish requires proper surface preparation, the right primer, and high-quality paint. Done correctly, painted aluminum windows can look great and last for years.
In this guide, we’ll explain whether aluminum clad windows can be painted, when it’s a good idea, and the professional techniques that help ensure long-lasting results.
Quick Answer
Yes, aluminum clad windows can be painted. Success depends on thoroughly cleaning the surface, removing oxidation, lightly scuffing the finish, applying a quality bonding primer, and using thin coats of high-quality exterior paint.
Key Takeaways
- Aluminum clad windows can be successfully painted with proper preparation.
- Removing oxidation is essential for good paint adhesion.
- Light scuffing creates a stronger mechanical bond.
- Use a quality bonding primer designed for metal surfaces.
- Thin coats produce a smoother, longer-lasting finish.
Why Paint Aluminum Clad Windows?
Why would you want to paint your aluminum clad windows? Two main reasons: they’re ugly and replacing them is expensive.
Here in sunny Denver, it doesn’t take long for aluminum clad window frames to oxidize, turn chalky, and start looking tired—even from the curb. Painting them can dramatically improve your home’s appearance for a fraction of the cost of replacement.
Plus, many older aluminum clad windows were only available in a handful of colors that haven’t exactly aged gracefully. Years of Colorado sunshine leave them faded into a dull, chalky finish that’s far less attractive than when they were first installed.
Can You Paint Aluminum Clad Windows?
Can they be painted?
Absolutely.
Should they be painted?
That depends on who paints them—and how they’re prepared.
How to Paint Aluminum Clad Windows
Step 1: Clean and Prepare the Surface
As usual, the first rule always applies:
Clean. Dry. Dull.
Cleaning is the tricky part with aluminum windows. This is one project where taking shortcuts usually leads to peeling paint later.
Many aluminum clad windows develop oxidation over time. In Colorado’s intense UV exposure, the factory finish often becomes chalky, creating one of the biggest obstacles to paint adhesion.
Before cleaning, lightly scuff the aluminum surfaces with fine steel wool. Be sure to tape off the glass first so you don’t accidentally scratch it.
Remember that many windows open. If you want the new color to be visible when the window is open, don’t forget to prep the edges of the moving sash as well.
After scuffing, thoroughly clean the surface with a non-soapy cleaner or prep solvent available from your local Benjamin Moore or Sherwin-Williams store.
I don’t recommend relying on liquid de-glossers as a shortcut. Mechanical abrasion creates a better bonding surface than a chemical substitute, and it’s a step worth taking.
Step 2: Prime the Aluminum
The 2nd rule of painting aluminum clad window frames is thin coats of material. Whether primer or paint, keep it thin. This is true of any window painting, but especially true with metal window trim.
Properly rubbed-out and cleaned, now it’s time to prime. Here’s a great and effective shortcut – aerosol primer! You’ll have to apply some 12” paper masking to protect the glass, siding, brick, etc. from the overspray.
The beauty of the aerosol primer is that it goes on very thin and even, which is the way paint performs best – thin coats allowed to dry properly. Choose the best quality primer here, not the $0.99 bargain primer. You’re asking the primer to do a big job here: be the transition layer between your metal window trim and your trim paint.
Step 3: Check the Caulking
After the primer dries, inspect the windows for any areas that may need fresh caulk.
Many aluminum clad windows won’t require additional caulking, but when they do, primer provides a much better surface for caulk to adhere to than bare aluminum.
Step 4: Apply the Finish Paint
Now it’s time to paint! Remember to keep it thin. Brushing is fine, spraying is better; again, aerosols are great if you can find the right color. If not, you can spray your trim paint using a cup gun or airless sprayer with a small tip.
Assuming you don’t have a sprayer, or don’t want to fuss with it, buy a good quality Purdy, Wooster or Corona-brand angle sash brush in about a 2½ inch width.
Another tip, start with the windows in the back of the house, just to get in the swing of things. Then by the time you get around to the front of the house, you’ll have it down pat. If you’re planning to update more than just the exterior, our room painting services can give your interiors the same refreshed feel.
The best part of painting aluminum window frames is you get to pick the color! Your house will look so much better, and your neighbors will bring pie.
How Long Does Paint Last on Aluminum Clad Windows?
Properly painted aluminum clad windows can maintain their appearance for many years.
The biggest factor isn’t the paint itself—it’s the preparation.
Removing oxidation, creating proper surface profile, using a quality bonding primer, and applying thin finish coats all contribute to a finish that withstands Colorado’s intense UV exposure and changing weather.
Conclusion
Painting aluminum clad windows is one of the most cost-effective ways to improve your home’s curb appeal without replacing the windows themselves. With careful preparation, quality primer, and thin finish coats, painted aluminum windows can provide a durable, professional-looking finish that lasts for years.
If you’d rather leave the preparation and painting to an experienced professional, Imhoff Painting specializes in painting aluminum clad windows and exterior trim throughout the Denver metro area. From proper surface preparation to the final finish coat, we use proven techniques that deliver durable, long-lasting results. Contact us today for a free estimate.
Frequently Asked Questions
Can aluminum clad windows be painted?
Yes. Aluminum clad windows can be successfully painted when they’re properly cleaned, lightly scuff sanded, primed with a bonding primer, and finished with a high-quality exterior paint.
What paint should you use on aluminum clad windows?
Use a premium exterior paint designed for metal surfaces along with a high-quality bonding primer. Always follow the paint manufacturer’s recommendations for compatibility.
Do aluminum windows need primer before painting?
In most cases, yes. Primer helps create a strong bond between the aluminum surface and the finish coat while improving durability.
How long does paint last on aluminum clad windows?
With proper preparation and quality materials, painted aluminum clad windows can maintain their appearance for many years. Surface preparation and exposure to weather have the biggest impact on longevity.
Can you paint aluminum window frames without sanding?
Light scuff sanding is strongly recommended. It creates a mechanical bond that helps primer and paint adhere much better than applying coatings directly over a smooth factory finish.