How to Make a Sliding Blackout Door

This guide details the construction of a lightweight, sliding blackout door designed to prevent light from entering through doorways. It offers an alternative to more complex and expensive sliding door systems.

Project Overview

The goal is to create a simple, effective, and unobtrusive solution for darkening a room, particularly through glass doors where conventional methods may be insufficient. This project focuses on a DIY approach using readily available materials.

Required Materials

• 5 mm thick “SmartX” sheet (unprinted)
• Printed PVC foil
• Wide transparent packing tape
• Microfiber cloth
• Small clamps
• Two 10 cm long metal plates with four holes each
• Two small 24 mm roller wheels (7 mm thickness)
• Rectangular black foam rubber block (for handle)
• 2-meter white PVC square U-profile (15 mm width) for the track
• 1-meter square tube

Construction Steps

Planning the Sliding Door

The door leaf is to be constructed from a lightweight panel material. Materials commonly used for large-format prints, such as foam core, honeycomb cardboard, or hollow chamber boards, are suitable. A specialist copy shop can offer various options and custom printing services.

For this project, a “SmartX” sandwich board was selected due to its scratch-resistant plastic surfaces and foam core. It should be cut to the desired size (approximately 900 x 1900 mm) and have a thickness of 5 mm. While lightweight, this material requires careful handling to avoid bending or breaking.

As the “SmartX” board is translucent, it needs to be covered with a light-blocking PVC foil. Ordering this foil with a custom design (e.g., a black background) from an online poster printing service is recommended for optimal light opacity.

Assembling the Sliding Door

1. Edge Sealing: Seal all four edges of the panel with wide, transparent packing tape to protect the porous foam core from damage.
2. Applying the Foil: Carefully apply the pre-cut PVC foil to the panel. Use a microfiber cloth to smooth out any air bubbles, working from the center outwards. Small clamps can be used to temporarily fix the foil along the longer edges for precise placement.
3. Attaching Rollers: Securely attach the two metal plates to the top edge of the panel. This can be done by creating pilot holes in the plastic panel using a heated nail. Then, screw the roller wheels onto the metal plates, ensuring the wheels are positioned directly above the panel to ensure the door hangs vertically.
4. Adding a Handle: Adhere the foam rubber block to the side edge of the panel to serve as a handle for sliding the door.
5. Protective Seal: Attach a rubber sealing strip (typically used for drafty windows) to the bottom edge of the panel as an additional protective measure.

Installing the Track

1. Track Placement: Use the white PVC square U-profile as the sliding track. Apply strong adhesive (e.g., super glue) to adhere half of the U-profile, with the opening facing upwards, to the upper door frame. Adhere the remaining half to the adjacent wall in the desired parking position for the door.
2. Spacer Installation: If the door frame protrudes from the wall, use the 1-meter square tube as a spacer between the track and the wall to ensure proper alignment. Adhere this spacer to the wall first, then the track to the spacer.

Final Installation and Use

Carefully hang the constructed sliding door into the installed track. The lightweight design and smooth-rolling wheels should allow for effortless movement. The combination of plastic components ensures friction-free operation without the need for lubrication and minimizes noise.

This setup allows the door to effectively block light when closed, while the original glass door remains fully functional. The design is intended to be a simple and effective blackout solution.