Starlink Obstruction Guide: How to Find the Perfect Spot for Zero Downtime
The Critical Importance of a Clear Sky View
Starlink operates by communicating with Low Earth Orbit (LEO) satellites that are constantly moving across the sky. Unlike traditional satellite internet, which looks at one fixed point, Starlink needs a wide, sweeping view of the heavens. Even a small branch or a chimney can cause "micro-outages" that drop your connection during critical moments like gaming or video calls.
![DIAGRAM: A wide-angle view of a house showing the 'sky dome' above it. Highlight the area where the dish needs a clear line of sight to the satellites passing overhead.]
Using the Starlink App Obstruction Tool
The most powerful tool at your disposal is the Starlink mobile app. Before you drill a single hole, use the built-in "Obstruction Tool."
How to use it effectively:
- Mount your phone securely: Hold your phone at the approximate height where you plan to mount the dish.
- Scan the sky: Follow the app's instructions to scan the horizon and the zenith (the point directly overhead).
- Analyze the results: The app will generate a map of your sky. Areas marked in red or with warning icons indicate where trees, roofs, or structures will block the signal.
![IMAGE: A screenshot of the Starlink App's obstruction scan interface, showing a successful scan versus a scan with high obstruction warnings.]
Common Obstacles to Watch For
It isn't just about big buildings. Many users are surprised by these common culprits:
- Tree Canopies: Even if you can see the sky through leaves, the moisture in the leaves can attenuate the signal. Aim for "clear sky," not "mostly clear."
- Chimneys and Vents: These are often overlooked but can cause intermittent signal drops as satellites pass behind them.
- Roof Ridges: If your dish is mounted too low on a roof, the peak of the house itself becomes a permanent obstacle.
- Power Lines: While they don't block the signal, proximity to high-voltage lines can occasionally cause electromagnetic interference.
The "Seasonal Shift" Trap
One of the biggest mistakes DIY installers make is testing their location in the summer and assuming it's perfect for the year.
- Leaf Growth: Trees that look clear in winter will become massive obstructions once they leaf out in spring.
- Sun Angle: The angle of the sun and the way light hits certain structures can change, but more importantly, the satellite paths can vary slightly by season.
Pro-Tip: Always check your obstruction scan during the season when your trees are at their fullest.
Pro-Tips for Optimal Placement
- Go Higher: Whenever possible, mounting your dish higher (on a pole or a roof mount) significantly increases your "viewing window" and reduces the impact of ground-level obstacles.
- The 360-Degree Rule: While Starlink can track satellites, having a more centralized, high-altitude position gives the dish more options to switch satellites quickly without hitting an obstacle.
- Avoid "Near-Misses": If the app shows a tiny sliver of obstruction, don't risk it. A 95% clear sky is often much worse than a 100% clear sky in terms of actual stability.
![DIAGRAM: A comparison diagram showing 'Poor Placement' (Dish near a tree branch) vs 'Optimal Placement' (Dish on a high pole with a clear view).]
Summary Checklist
- [ ] Used the Starlink App Obstruction tool?
- [ ] Accounted for seasonal tree growth?
- [ ] Placed the dish high enough to clear rooflines?
- [ ] Verified the spot is free of chimneys and vents?