Painting your window frames is one of those small updates that can make a big visual impact, both inside and out. Whether you’re refreshing old wood frames or giving outdated aluminum ones a modern look, a clean, professional paint job can improve curb appeal and extend the life of the frames.
Here’s a step by step guide on how to paint window frames correctly, along with answers to some common questions.
Step 1: Clean and prep the surface
Start by cleaning the window frames thoroughly to remove dust, dirt, or grease. For exterior frames, use a mild soap solution and a scrub brush. Dry completely before moving on.
If there’s old, flaking paint, scrape it off carefully with a putty knife. Then lightly sand the surface to improve adhesion (unless using a no-sand primer—more on that below).
Step 2: Protect the surrounding area
Use painter’s tape to mask off glass edges, walls, and trim. Place drop cloths on the floor or window sill to catch drips.
If you’re working with operable windows, make sure they can still open or close during the process—or plan to paint in sections.
Step 3: Prime the surface (if needed)
Priming is especially important for:
- Bare wood
- Metal (like aluminum or steel)
- Previously glossy finishes
Use a primer that matches your surface type—bonding primers work well for smooth or non-porous materials like aluminum.
Step 4: Apply the paint
Choose a high-quality paint designed for trim or exterior use. A satin or semi-gloss finish is ideal because it’s durable, easy to clean, and resists moisture.
Use a small angled brush for precision, and apply thin, even coats. Let the first coat dry fully before adding a second for better coverage and longevity.
Step 5: Remove tape and touch up
Once the final coat is dry to the touch, gently remove painter’s tape at a 45° angle to avoid peeling. Touch up any missed spots or clean paint lines as needed.
What kind of paint do you use on window frames?
- Interior wood frames: Water-based latex or acrylic trim paint
- Exterior wood frames: Exterior-grade acrylic latex or oil-based paints
- Aluminum frames: Use a bonding primer + acrylic latex or spray enamel
- Vinyl frames: Only paint if labeled “paintable vinyl”; use vinyl-safe paint
Is it possible to paint aluminum window frames?
Yes! With proper prep, aluminum frames can be painted successfully. You’ll need to:
- Clean and degrease
- Sand lightly to create surface grip
- Apply a self-etching or bonding primer
- Use a durable, rust-resistant paint
Can you paint window frames without sanding?
If you’re using a high-adhesion primer, it’s possible to skip sanding—but only if the surface is in good condition. For glossy or previously painted frames, light sanding is still recommended for best results.
Looking for a company painting in Brookline, MA?
Whether you’re updating window frames, exterior trim, or your entire home, Greater Boston Contractors provides top-tier painting services in Brookline and surrounding areas. Our skilled team uses premium products and precise techniques to deliver smooth, long-lasting finishes—inside and out.
We offer:
- Surface-specific prep and paint
- Interior and exterior solutions
- Custom color matching
- Local expertise with a professional touch
Contact Greater Boston Contractors today for expert painting services in Brookline, MA and beyond.