Brush Techniques For Painting Windows Like A Pro

Painting a window with a brush is a simple way to boost your home's curb appeal. It is important to prepare the window before painting by cleaning and scraping off old paint, removing hardware, and taping off any areas you don't want to get paint on. Use a narrow paintbrush for better control and start by painting the inside frame of the window, letting it dry before continuing. Avoid brushing the top or bottom edges of the window sash. Paint the window casing and sills and let dry before applying a second coat for optimum results.

Clean the window frame

Next, use a putty knife to remove loose paint and window putty from around the edge of the window. Push the scraper end of the knife under the paint and putty until it lifts, then gently push to remove as much as possible. Switch to a wire-bristled brush to continue removing paint and putty. Finally, sand the area with sandpaper, using a block or power sander until the window trim feels smooth.

If your window was installed before 1978, be sure to practice lead paint safety. Follow the Environmental Protection Agency's (EPA) renovation, repair, and painting program guidelines.

Prepare your paint

Before you start painting, it's important to prepare your paint properly. Here are some steps to help you get started:

• Choose the right type of paint: For windows, it is recommended to use a high-quality exterior trim paint that is specifically designed for outdoor use. Look for paint that is durable and can adhere to common trim materials. Consider the sheen you want as well – a higher sheen paint will give your trim a more durable coating and better highlight your home's architectural features.
• Primer: While primer is not always necessary, it is a good idea to use one, especially if you are painting over a previous coat of paint or varnished wood. A premium primer will promote better adhesion and durability for your topcoat. Alternatively, you can use paint that is innovatively developed as a paint and primer, such as BEHR ULTRA™ products.
• Mix the paint: Before you begin painting, make sure to thoroughly mix your paint. This will ensure that the colour is consistent and that all the ingredients are properly combined.
• Temperature and humidity: When working outdoors, it is best to paint in temperatures between 50º-90ºF (10º-32ºC) with moderate humidity. Avoid direct sunlight as it can affect the drying time and quality of your paint.
• Brush choice: Use a quality 2"-2.5" wide nylon/polyester brush for your paint. For smaller, detailed areas, an angled brush can help you get into the corners of the window.

By following these steps, you will be well on your way to successfully painting your window with a brush.

Paint the inside frame

Painting the inside frame of a window with a brush is a simple task that can be completed in a few steps. Here is a guide to help you through the process:

Prepare the Work Area:

Before starting, ensure you have the right tools and materials. You will need a quality nylon/polyester brush that is 2"-2.5" wide or 5.1 - 6.4 cm wide. It is also recommended to have a bucket of paint, some masking tape, and a putty knife or wire-bristled brush for any necessary scraping. Wear protective gear, such as rubber gloves, a mask, and goggles, if working with chemicals or old paint.

Clean and Prepare the Window:

Start by cleaning the window frame with a mild solution of trisodium phosphate (TSP) and warm water. Use a sponge to wipe down the frame, then rinse with clean water. If there is any loose paint or window putty, use a putty knife to gently remove it. You can also use a wire-bristled brush for more effective removal. Finally, sand the area with sandpaper to smooth out any remaining residue.

Painting Technique:

Pour your thoroughly mixed paint into the bucket and dip your brush into it. Tap off the excess paint against the inside wall of the bucket to avoid drips. Start painting the inside frame of the window from the top, working your way down. Maintain a wet edge by reloading the brush as needed.

Allow for Drying and Second Coat:

Once you have completed painting the inside frame, let it dry thoroughly. Depending on the type of paint, drying times can vary. Oil-based paints typically take six to eight hours to dry, while latex paints dry within an hour. After the initial coat has dried, consider applying a second coat for optimum results in colour and finish.

Additional Tips:

• If your window has a sash, raise the lower sash and drop the upper sash before painting. Paint the upper sash first, starting with the crossbar, followed by the lower sash.
• Avoid brushing the top or bottom edges of the window sash, as these will be used to raise and lower the sash.
• For windows with a grid, paint it first. Don't worry if you get paint on the glass, as you can scrape it off later with a razor blade.

Paint the sashes

Painting window sashes can be a simple task if you follow these steps:

Prepare the Window Sashes:

Before you start painting, it's essential to clean the window sashes thoroughly. Use a window washing solution to clean the glass and scrape off any old paint or gunk at the intersection of the glass and wood sash. Be careful not to scrape dry glass, as it can cause scratches. If the sashes are removable, take them out of the window frame and place them on a workbench or sawhorses for easier painting.

Protect the Glass:

To avoid accidentally painting the glass, you can use masking tape to cover it. Alternatively, you can use a product like Masking Liquid H2O, which you paint over the glass to protect it from paint. It dries and can be easily peeled off later, ensuring a clean paint line without the hassle of taping.

Prime the Wood:

Before painting, apply a coat of primer to the bare wood. This will help the paint adhere better and improve its longevity. Allow the primer to dry completely before moving on to painting.

Now, you're ready to start painting the sashes. Use a quality angled sash brush that is narrow, about 1-1/2 inches wide, for better control and easier access to tight corners and small spaces.

Start by raising the lower sash and dropping the upper sash. Begin painting the upper sash first, starting at the crossbar. Work your way across the upper sash, maintaining a wet edge by reloading the brush as needed.

Then, move on to the lower sash, following the same process, starting at the crossbar. Be careful not to brush the top or bottom edges of the sashes, as these will be used to raise and lower them.

If there are any obstructed sash areas that were difficult to reach, paint them now, ensuring full coverage. Allow the paint to dry completely before proceeding to the next steps.

Finish with a Second Coat:

For optimum results and a uniform finish, consider applying a second coat of paint to the sashes. Follow the same process as before, allowing the paint to dry completely before reassembling the window.

Remember to work in a well-ventilated area and follow all safety precautions when working with paint and chemicals.

Paint the window casing and sills

Painting your window casing and sills is a straightforward process but requires some preparation. Firstly, you should clean the window frame. This will help the new paint stick and make it easier to remove old paint. Trisodium phosphate (TSP) is a recommended cleaning product. Mix it with warm water in a bucket and use a sponge to wipe down the window trim. Then, rinse with clean, warm water. Remember to wear rubber gloves, a mask, and goggles when working with TSP.

Next, use a putty knife to remove loose paint and window putty from the window's edge. Push the scraper end gently under the paint and putty until it lifts. Switch to a wire-bristled brush to continue removing paint and putty. Sand the area with sandpaper until it feels smooth.

Now, you can start painting. Begin by priming any bare wood with a paintbrush and letting it dry completely. Priming will help the paint stick and give you neater results.

For the paint itself, use a quality 2"-2.5" wide nylon/polyester brush. Start by painting the inside frame of the window, beginning at the top. Remember to tap off excess paint against the inside wall of the bucket to avoid drips. Let the paint dry, then raise the lower sash and drop the upper sash. Paint the upper sash, beginning with the crossbar, then repeat the process with the lower sash. Do not brush the top or bottom edges of the window sash.

Now you can paint the window casing and sills. Let this dry, then apply a second coat for optimum results.

Frequently asked questions