Why Obstructions Matter So Much
Starlink communicates with a moving constellation of satellites across a wide portion of the sky. Unlike a traditional satellite dish aimed at one fixed point, your Starlink dish needs to see satellites passing in many different directions. When something blocks part of that view, the dish loses contact with satellites in that zone, causing brief disconnections.
These disconnections last only seconds, but they add up. On a video call, each one causes a freeze or audio drop. In an online game, it is a lag spike or disconnect. For general browsing, pages stall momentarily. The more obstruction you have, the worse these interruptions get.
How to Check Your Obstructions
Step 1: Open the Starlink app on your phone.
Step 2: Before installing the dish, use the "Check for Obstructions" tool. This uses your phone's camera and sensors to create a field-of-view map showing what the dish would see from that position. Red zones are blocked. Blue or clear zones are open sky.
Step 3: If your dish is already installed, go to the app's main screen and look for the obstruction data. It shows a percentage of time the dish is obstructed and a visual map of blocked directions.
What the percentages mean:
Common Obstruction Sources
Trees. The most common culprit by far. Tall trees near the dish block large portions of the sky. Deciduous trees are particularly tricky because they may look fine in winter but create heavy obstruction when leaves fill in during spring and summer.
Your own roof. If the dish is mounted on a low section of the roof, the roof peak or a chimney above it can block part of the sky. Even a few degrees of roofline obstruction counts.
Neighboring buildings. A two-story house next door, a barn, or a commercial building near the property line can block the view in one direction.
Power lines and poles. These create thin but persistent obstructions that cause regular micro-dropouts.
Satellite dishes. Ironically, an old TV satellite dish on your roof can block part of your Starlink's view.
How to Fix Obstructions
Option 1: Move the dish higher. The single most effective fix. Moving from ground level to a roof peak, or from a low roof section to the peak, often eliminates most obstructions. Height gets the dish above trees and structures.
Option 2: Move the dish to a different location. Sometimes a spot 30 feet away has a much clearer sky view. If the north side of your house faces trees but the south side is open, a south-side roof mount or a pole mount in the south yard may be dramatically better.
Option 3: Use a pole mount. For properties surrounded by tall trees, a pole mount that extends 10 to 30 feet above ground level can get the dish above the treeline entirely. This is the most reliable solution for heavily wooded properties.
Option 4: Trim trees. If a few specific branches are the problem, trimming them is cheaper than moving the dish. Be realistic about how much trimming is needed — if you need to remove entire trees, the cost may exceed a new mounting solution.
Option 5: Accept the obstruction. If you only have 1 to 2 percent obstruction and your use case does not require perfect uptime, you may decide the performance is acceptable as-is. Not every installation needs to be perfect.
Seasonal Changes to Watch For
If you install Starlink in winter, check the obstruction map again in June. Deciduous trees can add 10 to 20 percent obstruction when they leaf out. Conversely, if you install during peak foliage, you may see improvement in winter.
This seasonal factor is one of the main reasons we recommend professional installation. An experienced installer will evaluate your property considering full-year conditions, not just what the sky looks like today.
When to Get Professional Help
If your obstruction percentage is above 3 percent and you cannot find a better mounting location yourself, a professional assessment is worth the cost. We evaluate multiple potential mounting positions, consider seasonal changes, and install the dish in the optimal spot with proper hardware. The speed and reliability improvement usually pays for the installation cost within a few months.
Book a site assessment or contact us with questions about your obstruction situation.