Anchoring an outdoor table on a rooftop terrace is essential to prevent it from tipping over or being blown away by strong winds. Here are the most effective methods to secure your table:

1. Weighted Base: Use sandbags, concrete blocks, or weighted table bases to add stability. This is ideal for lightweight tables.

2. Anchor Straps or Tethers: Attach heavy-duty straps or bungee cords to the table legs and secure them to fixed structures like railings or terrace anchors.

3. Adhesive or Suction Pads: For smooth surfaces, non-slip adhesive pads or suction cups can provide temporary stability, though they may not withstand extreme weather.

4. Permanent Mounting: For long-term solutions, drill and bolt the table legs to the terrace floor or use ground anchors for added security.

5. Windbreaks: Install barriers like screens or planters to reduce wind exposure, indirectly helping to keep the table in place.

Always consider the terrace material and local weather conditions when choosing an anchoring method. Combining multiple techniques often yields the best results for a secure and stable setup.