1. Product Overview
The IKEA Billy 902.638.60 Height Extension Unit is designed to maximize wall space and provide additional vertical storage when combined with a compatible BILLY bookshelf. This unit helps optimize floor space by extending your existing storage vertically.
This product requires assembly.

Image 1.1: The IKEA Billy 902.638.60 Height Extension Unit in white, designed to be placed on top of a standard BILLY bookshelf for added storage height. It features pre-drilled holes for shelf pins on the side panels.
2. Safety Information
For your safety, a wall-mounting safety strap is included with this unit. It is crucial to secure the extension unit to the wall to prevent tipping, especially in households with children or pets. Always follow the assembly instructions carefully for proper installation of the safety strap.
Ensure the unit is placed on a stable and level surface before attaching it to the wall.
3. Package Contents
Please verify that all components are present before beginning assembly. The package typically includes:
- Top panel (Particleboard, foil, ABS plastic edging)
- Side panels (Particleboard, foil, ABS plastic edging, paper foil)
- Back panel (Particleboard, foil, ABS plastic edging, paper foil)
- Assembly hardware (screws, dowels, shelf pins, wall-mounting safety strap)
Note: Specific quantities of hardware may vary. Refer to the detailed assembly instructions provided in the product packaging for an exact list.
4. Setup and Assembly
This height extension unit is designed to be combined with a standard BILLY bookshelf (approximately 40 cm x 202 cm or 15¾"x79½") for additional vertical storage. Assembly typically requires basic household tools such as a screwdriver and hammer.
- Unpack all components and lay them out on a clean, soft surface to prevent scratches.
- Identify the top, side, and back panels.
- Attach the side panels to the top panel using the provided hardware (e.g., dowels and screws).
- Slide the back panel into the grooves of the side panels.
- Secure the back panel with small nails or screws as indicated in the detailed instructions.
- Carefully lift the assembled extension unit and place it on top of your existing BILLY bookshelf.
- Attach the wall-mounting safety strap to the top of the extension unit and secure it to the wall according to the instructions. This step is critical for stability and safety.
- Ensure all connections are tight and the unit is stable before placing items on it.
For detailed, step-by-step visual instructions, please refer to the assembly guide included in your product packaging or visit the official IKEA website for the BILLY series assembly instructions.
5. Operating Instructions
Once assembled and securely mounted, the IKEA Billy Height Extension Unit functions as an additional storage space. You can place books, decorative items, or other belongings on its shelves. Ensure that items are distributed evenly to maintain stability. Avoid overloading the unit beyond its structural capacity.
6. Maintenance and Care
To keep your IKEA Billy Height Extension Unit in optimal condition:
- Cleaning: Wipe clean with a damp cloth. Use only water or a non-abrasive detergent. Wipe dry with a clean cloth immediately after cleaning to prevent moisture damage.
- Inspection: Periodically check all screws and fittings to ensure they are tight. Retighten if necessary.
- Wall Fastening: Regularly verify that the wall-mounting safety strap remains securely fastened to both the unit and the wall.
- Avoid: Do not use harsh chemicals, abrasive cleaners, or scouring pads, as these can damage the surface finish.
7. Troubleshooting
- Unit feels wobbly: Ensure all assembly screws are tightened. Verify that the unit is placed on a level surface. Confirm the wall-mounting safety strap is correctly installed and secured to a sturdy part of the wall.
- Difficulty with assembly: Double-check the assembly instructions provided in the packaging. Ensure all parts are correctly oriented. Do not force components together; if parts do not fit, re-examine the instructions.
- Surface damage: For minor scratches, touch-up pens or furniture repair kits designed for white laminate surfaces may be used.
8. Specifications
| Model Number | 902.638.60 |
| Brand | IKEA |
| Color | White |
| Product Dimensions (W x D x H) | 40 cm x 28 cm x 35 cm (15.75" x 11" x 13.75") |
| Item Weight | 4.31 kg (9.5 lbs) |
| Material | Top panel: Particleboard, paper foil, plastic edging. Side/Back panel: Particleboard, paper foil, plastic edging, paper. |
| Special Feature | Wall-mounting safety strap for space-saving and stability. |
| Mounting Type | Wall Mount |
| Care Instructions | Wipe with a dry cloth; for cleaning, use a damp cloth with water or non-abrasive detergent, then dry. |
9. Warranty and Support
For information regarding warranty coverage, spare parts availability, or customer support, please refer to the documentation included with your purchase or visit the official IKEA website. You can also contact IKEA customer service directly for assistance with product-related inquiries.
Online Support: www.ikea.com