How to Treat and Finish an Internal Wood Door

Image of internal wooden doors inside a modern home

Internal wood doors are an essential and beautiful feature in any home. They add warmth, charm, and character to the interior spaces while also providing privacy and separation between rooms. To maintain the longevity and appearance of an internal wood door, proper treatment and finishing are essential. In this blog, our experts here at Eco Doors will guide you through the steps to treat and finish an internal wood door, ensuring it remains a stunning focal point for years to come.


Step 1: Prepare the Door

Before starting the treatment and finishing process, it’s crucial to prepare the door surface. Remove any hardware, such as knobs, hinges, and locks. Sand the door’s surface lightly with fine-grit sandpaper to smooth out imperfections, remove old finishes, and create a clean surface for the new treatment.


Step 2: Choose the Right Treatment

The treatment you select will depend on the type of wood and the desired look you want to achieve. There are several options to consider:

Stain: Wood stains are an excellent choice if you want to enhance the natural beauty of the wood grain while adding colour. Choose from a range of stain shades to match your interior decor.

Paint: If you prefer a solid colour or want to match the door to your walls or trim, painting is a versatile option. Ensure you use high-quality paint suitable for wood surfaces.

Varnish or Polyurethane: For a protective finish that showcases the wood’s natural appearance, varnish or polyurethane is an ideal choice. They provide a clear coat that protects the wood from moisture and wear.

Oil Finish: Oil finishes penetrate the wood, enhancing its natural beauty while offering protection. They are easy to apply and can be an excellent choice for various wood types.


Step 3: Application Process

Staining: Apply the wood stain using a brush or cloth, following the wood’s grain direction.

Wipe off excess stain with a clean cloth after a few minutes to achieve the desired colour intensity. Allow the stain to dry completely before proceeding to the next step.


Painting: Use a high-quality brush or roller to apply the paint evenly.

Apply multiple thin coats rather than one thick coat for a smoother finish.

Sand lightly between coats to achieve a smooth surface.


 Varnish or Polyurethane: Stir the varnish or polyurethane thoroughly before application.

Use a brush or foam applicator to apply the finish in thin, even coats.

Sand lightly between coats to ensure a smooth finish.


Oil Finish: Apply the oil finish with a brush or cloth, following the wood grain.

Allow the oil to penetrate the wood for the recommended time. Wipe off excess oil with a clean cloth. Repeat the process if a deeper finish is desired.


Step 4: Final Touches

Once the treatment is complete, let the door dry and cure according to the manufacturer’s instructions. This is crucial to ensure the finish becomes durable and long-lasting. After the curing period, reattach the hardware to the door.


Step 5: Regular Maintenance

To keep your internal wood door looking its best, perform regular maintenance. Dust the door regularly and clean it with a soft, damp cloth. Avoid using harsh chemicals that can damage the finish. If the finish starts to wear down over time, consider applying a fresh coat to revitalise its appearance.

Treating and finishing an internal wood door is a rewarding project that can transform the look and feel of any home’s interior. By choosing the right treatment and following the proper application process, you can enhance the natural beauty of the wood while protecting it from wear and tear. With regular maintenance,¬† wooden doors can be a cherished feature of any home for years to come.