The best way to black out windows for film is to securely attach black drapes or bin bags to the outside of the window frame using gaffer tape. Avoid taping directly to surrounding brickwork.
Here's a breakdown of the process and considerations:
Why Black Out Windows?
- Consistent Lighting: Eliminates unwanted external light sources, providing control over interior lighting. This is crucial for maintaining a consistent look throughout a scene.
- Preventing Shadows: Prevents unpredictable shadows from passing cars, sunlight, or other external elements.
- Achieving a Specific Look: Allows for creating a completely dark environment within a set, even during daylight hours.
- Privacy: Added privacy during filming.
Materials You'll Need:
- Black Material: Black drapes (heavy fabric is ideal), black bin bags (secured together for larger areas), or blackout cloth specifically designed for window covering.
- Gaffer Tape: A strong, matte cloth tape that adheres well and doesn't leave residue (as easily) upon removal. Crucially, use genuine gaffer tape, not duct tape.
- Measuring Tape: To determine the size of material needed.
- Scissors or Utility Knife: To cut the material to size.
- Optional: Clamps or Spring Clips: For extra security, especially with heavy drapes.
Step-by-Step Guide:
- Measure the Window(s): Accurately measure the width and height of the window frame you intend to black out. Add extra inches to each side to ensure complete coverage and overlap.
- Cut the Material: Cut your chosen black material to the measured dimensions, plus the extra overlap.
- Position the Material: The reference specifically mentions the outside of the window frame. This is often preferred because it helps reduce light leaks and heat buildup inside the room.
- Secure with Gaffer Tape: Starting at the top edge of the window frame, apply gaffer tape to attach the material. Ensure a tight seal along the edges. Work your way down the sides and across the bottom, using plenty of tape to create a secure, light-tight barrier. Overlap the tape for added strength.
- Inspect for Light Leaks: After taping, carefully inspect the blackout for any light leaks. Pay attention to edges, corners, and seams. Address leaks by adding more tape or adjusting the material.
- Reinforce (Optional): For heavier materials or long shoots, consider using clamps or spring clips to further secure the blackout to the frame.
Tips and Considerations:
- Test Your Blackout: Before filming, conduct a test to ensure no light is entering the room.
- Safety: If working at height, use a ladder safely and have someone spot you.
- Heat: Black material can absorb heat. Allow for adequate ventilation if the blackout is in place for an extended period.
- Surface Preparation: Clean the window frame before applying tape to ensure better adhesion.
- Alternative Materials (Less Ideal): While not ideal, cardboard, foam board, or thick blankets can be used in a pinch.
