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Before you open the box

A little preparation makes flat-pack furniture assembly easier to follow—and easier to pause when something does not fit.

First Toolbox editorial guide · Updated September 21, 2026
Research-based guidance. No hands-on product testing claimed.

1. Read the whole instruction booklet

Check the exact model and version, required tools, space requirements and whether another person is needed. Many manufacturers publish the assembly document on the product page, so you can check before the furniture arrives.

Notice steps that must happen in sequence. A back panel, brace or fitting may become inaccessible later. Identify any wall-anchoring requirements before placing the furniture in its final location.

2. Prepare the work area

Clear enough room to lay out the largest pieces without blocking your route. Use a suitable protective layer on the floor and keep the instructions visible. Separate similar-looking panels by their labels, hole patterns or the booklet's diagrams.

Sort hardware into small containers by type and length. Compare quantities against the parts list before beginning. If something is missing or damaged, contact the seller rather than substituting a fastener that merely looks similar.

3. Match the tool to the fastener

Use the bit profile and size specified for the screw. A bit that slips or rocks in the recess is a reason to stop and check it. Phillips and Pozidriv are different profiles, even though both can look cross-shaped; a hex socket also needs the correctly sized key.

A manual screwdriver gives useful feedback as a joint tightens. A powered driver may save effort where the instructions permit it, but do not assume that every cam fitting or panel fastener should be driven with one.

If resistance feels wrong, stop.

Check alignment, part orientation, screw length and the previous step. More force can hide an assembly mistake until the material or fitting is damaged.

4. Follow the tightening sequence

Some assemblies require joints to stay loose until the parts are aligned; others specify fastening immediately. Follow the sequence for your product rather than a universal rule. Keep fittings organized and do not discard apparently spare parts until the whole assembly and inspection are complete.

If a powered driver is allowed, follow its manual and use appropriate control settings. Finish cautiously and stop at the fastening condition specified by the furniture maker. Maximum power is not a useful default for delicate material.

5. Complete the safety and fit checks

Check that the furniture stands as intended, doors and drawers operate properly, and the required fixings are installed. Do not skip specified anti-tip anchoring. Wall material and hidden services affect the fixing method; get qualified help if you cannot confidently identify a suitable installation.

Keep the instructions, model details and any labeled spare fittings together. They will be useful for later adjustments, replacement parts or contacting the manufacturer.

A five-minute preparation checklist

Manufacturer references

Your product's own instructions take priority over this general preparation guide.