It is an excellent way to paint window trim and refresh the look of your home, giving it a neat and polished finish. Whether you’re renovating your space or simply updating your home’s appearance, painting window trim can make a significant difference. This step-by-step guide is designed to help you understand the process of painting window trim in Singapore.

How to Paint Window Trim in Singapore?

Singapore’s climate presents unique challenges for home maintenance, particularly when it comes to painting. The high humidity and frequent rainfall can affect the durability of paint. Therefore, it is crucial to choose the right materials and techniques to paint windows and trims. 

PS Painting Service Singapore is a well-known brand for its office painting, house painting, wall painting, exterior painting, and condo painting services. They provide a guide to effectively paint window trim without tape. Let’s go through the step-by-step guide to paint window frames.

Materials and Tools Needed

Before you begin to paint window trim outside, gather all the necessary materials and tools. Here’s a list to help you get started:

  • Paint 
  • Primer
  • Sandpaper 
  • Painter’s tape
  • Drop cloths or plastic sheeting
  • Paint brushes
  • Paint tray
  • Putty knife
  • Wood filler or caulk
  • Ladder or step stool
  • Cleaning supplies

Step 1: Preparing the Area

Preparation is key to a successful painting job. Start by thoroughly cleaning the window trim. Use soap and water to remove any dirt, dust, or grease. Pay extra attention to corners where grime can accumulate. Once the trim is clean, let it dry completely before proceeding to the next step.

Cover the floor and surrounding areas with drop cloths or plastic sheeting to protect them from paint splatters. Use painter’s tape to mask off the edges of the window glass and the walls around the trim.

How to paint window trims

Step 2: Sanding the Trim

Sanding the trim helps to create a smooth surface for the paint to adhere to. Start with medium-grit sandpaper to remove any old paint or rough patches. Then, switch to fine-grit sandpaper to smooth out the surface. 

Be sure to sand in the direction of the wood grain to avoid scratches. After sanding, wipe the trim with a damp cloth to remove any dust. This step is crucial, as dust can interfere with the primer and paint’s adhesion.

Step 3: Filling Holes and Gaps

Inspect the trim for any holes, cracks, or gaps. Use a putty knife to apply wood filler to any holes or imperfections. For gaps between the trim and the wall or window frame, use a caulk gun to apply the caulk. Smooth the caulk with a wet finger or a caulk smoothing tool to create a seamless finish.

Allow the wood filler and caulk to dry completely according to the manufacturer’s instructions. Once dry, lightly sand the filled areas to ensure they are smooth and even with the rest of the trim.

Step 4: Applying Primer

Primer is essential for creating a good base for the paint and ensuring better adhesion. Choose a primer that is suitable for the type of paint you will be using. For Singapore’s humid climate, a mildew-resistant primer is almost a must.

Stir the primer well before use and pour it into a paint tray. Use an angled sash brush to apply the primer, starting at the top of the trim and working your way down. Be sure to apply a thin, even coat and use long, smooth strokes to minimize brush marks.

Step 5: Painting the Trim

Once the primer is dry, it’s time to apply the paint. Depending on the location of your window trim, use high-quality, weather-resistant paint designed for exterior or interior use for best results.

Stir the paint thoroughly and pour it into a clean paint tray. Using the same angled sash brush, apply the paint in thin, even coats. Start at the top of the trim and work your way down, using long, smooth strokes. Be sure to paint in the direction of the wood grain to achieve a smooth finish.

painting window trim

Step 6: Touching Up and Cleaning Up

After the final coat of paint has dried, inspect the trim for any missed spots or uneven areas. Touch up these areas with a small brush, blending the paint smoothly into the surrounding area. Carefully remove the painter’s tape while the paint is still slightly tacky to avoid peeling off any paint. 

If the paint has dried completely, use a sharp knife to score along the edge of the tape before removing it. Clean your brushes and other tools immediately after use to keep them in good condition for future projects. Properly dispose of any used drop cloths or plastic sheeting.

Step 7: Final Inspection and Maintenance Tips

Once the paint has fully dried, perform a final inspection to ensure the finish is smooth and even. If you notice any imperfections, lightly sand the area and apply a touch-up coat of paint. To maintain the freshly painted trim, regularly dust it and clean any smudges or dirt with a damp cloth. 

In Singapore’s humid climate, it’s essential to look for signs of mildew or mold. If you notice any, clean the area with a mild bleach solution and consider reapplying mildew-resistant paint if necessary.


It can be a rewarding project in Singapore to paint window trims that significantly enhance the appearance of your home. By following these steps and using the right materials, you can achieve a professional finish that stands up to the local climate. Proper preparation, careful application, and regular maintenance will ensure that your painted trim looks beautiful and lasts for years. 

Frequently Asked Questions

If you're installing new windows or updating your home's color scheme, you'll likely need to paint the window trim.
The most common and preferred sheen for interior trim is a satin or semi-gloss finish. These finishes are easy to clean and resistant to dirt, stains, mold, and mildew.
You can definitely paint over your currently stained trim. There are several methods to do this, some of which are correct and effective, while others may not yield the best results. It’s important to choose the right approach to ensure a smooth, lasting finish.