Obstructions cause more Starlink performance problems than any other single factor — and most of them are fixable once you understand exactly what’s happening. This guide covers what counts as an obstruction, how to read the app, what your percentages mean, and every practical fix from cheapest to most permanent.
Starlink is fundamentally different from old satellite dishes that pointed at one fixed spot. Your dish communicates with hundreds of satellites moving across the entire sky every few seconds — which means obstructions anywhere in that arc cause problems, not just in one direction.
Traditional satellite dishes aimed at one geostationary satellite 22,000 miles up and stayed there permanently. Starlink’s satellites orbit at about 550 kilometers — much closer, moving fast, and there are thousands of them. Your dish makes a new connection to a different passing satellite roughly every 15 seconds. When any object blocks part of the sky that a satellite is passing through, the connection drops briefly during that handoff. A single branch blocking 2 percent of your sky view can cause 20 or more 1–3 second dropouts per day — enough to interrupt video calls, freeze streaming, and spike ping on every occurrence. The dish can’t work around it electronically; the fix is always physical.
Under 2% obstruction: the target for any permanent residential install. Expect virtually no obstruction-related dropouts. Between 2% and 5%: minor. Some occasional brief interruptions, tolerable for general browsing and streaming but noticeable in video calls. Between 5% and roughly 15%: significant. Frequent brief disconnections will interrupt video calls, cause audio drops, and create lag in gaming. Above 15%: unacceptable for most uses. Constant interruptions that make real-time communication unreliable. The app’s percentage alone doesn’t tell the full story — where in the sky the obstruction falls matters. A 3% blockage in a heavily-trafficked satellite corridor causes more drops than a 5% blockage in a direction satellites rarely pass through.
Yes — and this surprises many people. Starlink uses Ku-band radio frequencies, which are strongly attenuated by wet wood. Even bare deciduous branches in winter cause measurable signal loss and packet drops when satellites pass behind them. The impact is worse during rain when the wood is saturated. When leaves fill in during spring, the same trees that showed 3% obstruction in February can easily reach 15–20% by July. If you’re installing in winter, always evaluate your location as if it’s summer — scan slowly with the app and account for the full canopy height your trees will reach at peak foliage. A site that looks clear in December may be unusable by June.
Partially — but not as a substitute for a clear sky location. SpaceX updated Starlink terminals to build real-time obstruction maps of their surroundings and proactively switch to a different available satellite before a blockage happens. For mobile installations, reactive switching can occur in under 100 milliseconds. This technology reduces the impact of minor partial obstructions significantly — a single thin branch that would have caused 2-second drops per pass may now cause barely-noticeable half-second blips. What beam-switching cannot do: make a signal pass through a tree trunk, maintain a connection when dense canopy blocks every usable satellite path, or prevent drops when a solid structure like a chimney or building wall blocks a satellite. The fix for serious obstructions is still physical — raise the dish, move it, or clear what’s in the way.
Almost certainly yes if the drops are rhythmic and repeating. A specific obstruction — a chimney, a single tree trunk, a roofline edge — creates a repeating pattern because the same satellite corridor passes behind it on a predictable schedule. The drop happens, the satellite moves out from behind the obstruction, the connection restores, and the cycle repeats. Open the Starlink app, go to Statistics, and look at the Outages list — the entries will be labeled with the cause. If they say “obstruction” or appear at consistent intervals, the app’s visual obstruction map will show you exactly which direction the problem is coming from. Random drops that don’t follow a pattern more likely indicate cable issues, overheating, or a router problem.
Height. Moving the dish higher — from ground level to a roof, from a low eave to a roof peak, or from a roof to a dedicated pole mount above the treeline — resolves more obstruction problems than any other single action. The reason is geometry: the higher the dish, the flatter the obstructions appear in its field of view, and the more sky becomes visible over and around them. A dish at ground level surrounded by 20-foot trees may show 30% or more obstruction. The same dish raised to 25 feet on a pole in the same yard may drop to under 5%. The goal isn’t a specific height — it’s a clear 25-degree elevation angle in every direction. Use the app at the intended mount height (tie your phone to a broomstick if needed) to confirm clearance before drilling anything.
Often yes — if the obstruction is one specific branch or a small cluster. The app’s obstruction map shows you exactly which direction the problem comes from. If a single pine branch on your left shows as a red arc in the app, removing that branch or even pruning it back a few feet may completely eliminate the corresponding dropouts. The fix has to be physical: the branch either clears the 25-degree elevation cone or it doesn’t. Be realistic about scale: if fixing the obstruction requires removing multiple large mature trees, the labor and cost may exceed the price of a taller pole mount that gets the dish above the canopy instead. For a few specific branches in the dish’s line of sight, trimming is often the fastest and cheapest solution.
Yes — and you should. The Starlink app (free on iOS and Android) includes the obstruction checker without requiring a connected dish or an active account. Download the app, open “Check for Obstructions,” and stand at your planned dish location with your phone held at the height where the dish would be mounted. The app uses your phone camera and sensors to scan the sky and show what a dish at that point would see. Hold your phone at the actual planned mount height — results from standing at ground level are not meaningful for a roof installation. If you’re checking a rooftop spot, use a ladder. For a spot near a high tree canopy, tie the phone to a pole and extend it to the intended height. This pre-order check is the most valuable ten minutes in the entire Starlink setup process.
Understanding why Starlink is so sensitive to obstructions helps you make smarter decisions about where to mount the dish — and keeps you from being surprised by problems that other satellite services wouldn’t have.
Old geostationary satellites sat in one fixed spot 22,000 miles up. Your dish pointed there once, and obstructions only mattered in that single direction. Starlink’s low-Earth orbit constellation works completely differently: over 6,500 satellites orbit at about 550 kilometers altitude, moving so fast that any given satellite crosses your visible sky in about 5–10 minutes. Your dish makes a new handoff to a different satellite roughly every 15 seconds. This is what creates low latency — but it means the dish must maintain a clear view across a wide arc of sky simultaneously, not just one fixed point. Anything inside that arc causes a dropout when a satellite passes behind it.
Each obstruction-caused dropout typically lasts 1 to 3 seconds. That might not sound serious — but consider what happens in those seconds. On a video call, 2 seconds of dropped signal freezes your face mid-sentence and scrambles audio for the person on the other end. In an online game, it’s a lag spike or disconnect that can end a session. For streaming, the buffer usually absorbs single dropouts, but multiple per hour cause visible freezes. For work tools like Zoom, Teams, or cloud-based software, repeated brief drops create an experience that feels like a bad connection even though your speeds between drops might be excellent. The number of drops per day matters more than their length.
Many new Starlink customers blame weather for signal problems when obstructions are actually the cause. Heavy rain does temporarily reduce Starlink speeds — the dish is weather-rated and handles it, but thick precipitation absorbs some signal. However, weather events pass. Obstructions are there every clear day, every hour. A tree branch causing 20 daily dropouts in bright sunshine is doing far more cumulative damage to your experience than a thunderstorm that slows you down for two hours twice a month. If your Starlink is dropping connections on a clear day, weather is not the cause. Open the app, check the Outages log, and look at the obstruction map.
Any solid object inside the 25-degree elevation cone above your dish is an obstruction. Some are obvious; a few catch people off guard. Here are the ones that cause the most real-world problems.
Trees are responsible for more Starlink performance problems than everything else combined. Tall deciduous trees are the worst case because they change dramatically with the seasons — a site showing 3% obstruction in February can reach 20% by July when full canopy fills in. Conifers (pines, firs, spruces) are green year-round and often cause the same severe obstruction in every season. Even bare winter branches cause signal attenuation because Ku-band radio is absorbed by wet wood. Never evaluate a winter installation location without accounting for full summer foliage. Scan slowly with the app and consider the full height the trees reach at peak growth.
If the dish is mounted on a lower section of a multi-pitch roof, the peak above it can block a significant portion of sky. A chimney rising above a dish mounted near it blocks one direction entirely. Dormers, roof vents, HVAC units, and even old unused satellite dishes on the roof all count as obstructions. The dish is often installed in the most convenient accessible spot — which is rarely the spot with the clearest sky view. Always run the app check from the actual proposed mount location, not from a general area of the roof. Moving a few feet toward or away from the roof peak can dramatically change the obstruction picture.
A two-story house next door, a barn on an adjacent property, or a commercial building near the property line blocks the sky in that direction for much of the day. Unlike trees, buildings don’t change seasonally — they’re permanent hard obstructions that the app marks as solid red arcs. The app will show you exactly what direction the building falls relative to satellite paths. If the building is your neighbor’s and you can’t move it, your only options are to raise the dish high enough to clear the roofline, find a location on your property that isn’t in the building’s shadow, or accept partial obstruction and evaluate whether it’s in an active satellite corridor.
Power lines, telephone poles, and guy wires create narrow but persistent obstructions that cause micro-dropouts on a regular cycle as satellites pass behind them. Because they appear thin in the app’s sky map, people sometimes dismiss them as insignificant. In practice, a power line crossing the middle of the satellite corridor creates a repeating pattern of brief drops — often every few minutes — that adds up to a genuinely frustrating experience over a full day. Utility infrastructure is not moveable, and there’s nothing legally you can do about a neighbor’s power line. The fix is relocating or raising the dish until the line falls below the 25-degree horizon threshold.
Properties on the south side of a hill or ridge face terrain obstruction that no amount of mounting height resolves — the hill simply blocks part of the sky. In mountain terrain, even a ridge a half-mile away can create a significant obstruction arc in one direction. This is particularly relevant for U.S. customers because Starlink’s satellite paths are heaviest in the northern sky — terrain blocking the north blocks more active satellite passes than the same terrain blocking south. If your property is at the bottom of a north-facing slope, run the app check from multiple spots along the highest accessible point of the property to find where the terrain obstruction drops to an acceptable level.
Old DirecTV or DISH satellite dishes left on a roof, HVAC units, solar panel arrays, roof overhangs, and even tall antenna masts can all create obstructions you didn’t anticipate. Old TV satellite dishes are a particularly ironic issue — they’re close to the Starlink dish, at roughly similar height, and can block a meaningful arc of sky in the direction they face. If you have any rooftop hardware near your planned Starlink mount location, run the obstruction check specifically accounting for that equipment’s position and height. Removing old unused satellite equipment before mounting Starlink is almost always worthwhile — it frees up sky view and cleans up the roof simultaneously.
The obstruction percentage shown in the Starlink app tells you how much of the usable sky is blocked — but the impact varies depending on where the blockage falls. Here’s how to translate the number into what you’ll actually experience.
| Obstruction Level | What to Expect | Impact on Video Calls | Impact on Streaming | What to Do |
|---|---|---|---|---|
| Under 2% — Excellent | Virtually zero obstruction-related dropouts. As good as it gets for a residential install. | No perceptible interruptions | No buffering from signal drops | Install here — this location is ideal |
| 2%–5% — Acceptable | Occasional brief drops, usually a few per hour during active satellite passes. Most users find this tolerable. | Rare freezes — noticeable but infrequent | Buffer usually absorbs brief drops | Acceptable for most use; try to improve if possible |
| 5%–15% — Concerning | Frequent brief disconnections. Real-time applications are meaningfully impacted. General browsing still works. | Repeated audio drops and freezes | Visible pauses during active viewing | Fix before permanent install — raise dish or move |
| 15%–25% — Poor | Near-constant interruptions for real-time apps. General use is frustrating. Upload tasks fail frequently. | Video calls nearly unusable | Frequent buffering and interruptions | Do not install here — find a better location |
| Above 25% — Unacceptable | The dish will struggle to maintain a reliable baseline connection. Average speeds will be severely degraded. | Essentially unusable | Constant interruptions | This location does not work for Starlink |
Note: Where in the sky the blockage falls matters as much as the percentage. A 3% blockage in a heavily-trafficked satellite corridor causes more drops than a 5% blockage in a direction where fewer satellites pass. The app gives you the percentage — the visual map shows you where. Both numbers together tell the full story.
The obstruction checker in the Starlink app is the most accurate diagnostic tool available — far better than eyeballing the sky or relying on what worked for your neighbor. Here’s exactly how to use it and what the results mean.
The app shows what a dish would see from wherever you’re holding your phone. Results from standing at ground level are nearly meaningless for a roof mount. You need to hold the phone at the actual planned mount height — which may require a ladder for rooftop installs, or taping the phone to a long pole for checking clearance above trees. The Starlink support page explicitly says: hold the phone as close as possible to the height and perspective of where Starlink will be mounted. This is the single most important instruction in the entire obstruction check process.
- Download the Starlink app (free · iOS and Android · no account required for the obstruction check function)
- Go to the exact spot where you plan to mount the dish — not a nearby location, not the yard generally. The result is specific to the point in space where your phone is held.
- Hold the phone at mount height. Use a ladder for rooftop locations. Attach the phone to a broomstick or pole if checking clearance above a tree canopy. Accuracy depends on being at the right height.
- Open the app and tap “Check for Obstructions.” In current app versions, this is accessible from the main menu. The app uses your camera and sensors to scan the sky and build a field-of-view map.
- Pan slowly and completely — rotate in a full circle and tilt through the entire sky cone. Don’t rush; the app needs to see every direction to generate an accurate obstruction map.
- Read both the percentage and the visual map. The percentage tells you how much sky is blocked; the map shows you exactly which directions the blockage falls. A red arc in the north means obstructions where the most satellites pass — the worst location for an arc.
- Repeat at multiple candidate locations before choosing your final mount spot. Compare results from the roof peak, near the chimney, from the outbuilding roof, and from the yard’s clearest open area.
Once your dish is installed, the Starlink app’s Statistics screen shows an Outages log that tells you exactly what’s causing any connection problems. Open Statistics, look at the Outage entries, and read how they’re labeled. Entries labeled “obstruction” confirm the physical cause. Entries that appear at consistent intervals (every few minutes on a schedule) are almost certainly a specific object in the satellite path. Entries labeled “no satellites” are different — those indicate satellite coverage gaps, not physical obstructions. The Outages log is your single best diagnostic tool after the dish is running. It turns guesswork into a specific direction to investigate.
The right fix depends on what’s causing the obstruction and how much of your sky it covers. Here are the options in order of difficulty and cost, starting with what to try first.
Before spending any money on mounts or tree trimming, use the app to find a location on your property with better sky clearance. Move the dish on its kickstand to candidate spots and run the obstruction check from each. Sometimes moving a few feet forward, sideways, or to a different section of roof completely changes the obstruction picture. A spot that looks blocked from one angle may have a surprisingly clear sky window from 10 feet away. This is always the first thing to try — it costs nothing and takes minutes. The temporary kickstand is what it’s for.
If the app’s obstruction map shows a specific direction with a small arc of red — and that arc corresponds to a few identifiable branches — trimming those branches can completely eliminate the corresponding dropouts. The key word is “specific”: this fix works for a handful of branches in the satellite’s path, not for general proximity to a tree canopy. Use the app’s visual map to identify the exact compass direction of the obstruction, then go outside and find what’s in that direction from the dish location. Realistic limit: if fixing the obstruction requires removing entire large mature trees, a taller mount that clears the canopy is usually faster, cheaper, and more complete. Trimming costs $0–$500 depending on how much work is needed and whether you hire an arborist.
Height is the most consistently effective obstruction fix. Moving the dish from a low eave to the roof peak often drops obstruction significantly. Moving from the roof to a pole mount that clears the treeline can take a property from 25% obstruction to under 2%. The geometry is simple: the higher the dish, the more of the surrounding obstructions fall below the 25-degree elevation threshold where they no longer matter. The goal isn’t a specific height — it’s getting above the obstructions. For a suburban yard with 8-meter trees 10 meters away, that typically means the dish needs to be at least 5 meters off the ground. For rural properties with a full surrounding forest canopy, a dedicated pole mount — typically 10 to 30 feet tall — is often the only practical solution short of finding a clearing.
Properties in dense forest where the canopy is too high to overcome with any reasonable pole mount may have a natural solution: a clearing. A pond, a meadow, an open driveway, a gap between tree clusters — any location where the surrounding canopy opens up enough to give a viable sky cone. A clearing 15 meters across with 20-meter trees surrounding it gives roughly a 60-degree usable cone — workable for Starlink. Run the app from your phone in candidate clearings before committing to running cable to that location. Even an outbuilding at the edge of a clearing may give better sky clearance than any rooftop location surrounded by canopy. A small clearing with a pole mount can be the complete solution for properties that would otherwise have unusable obstruction from every roof location.
The right mount depends on what’s creating the obstruction and what your property allows. Here’s a plain comparison of the main options, what each fixes, and what it costs.
| Mount Type | Typical Cost | Best For | What It Fixes | Limitations |
|---|---|---|---|---|
| Roof Peak Mount | $35–$80 hardware | Most homes where the roof peak gives clear sky | Roofline and chimney obstructions below the peak | Requires drilling · doesn’t help with tall nearby trees |
| Chimney / Wall Pole Mount | $40–$100 hardware | Getting dish higher than roofline without a ground pole | Raises dish above most rooftop obstructions | Wind loads on tall chimney mounts — use heavy-gauge steel straps only |
| Ground Pole Mount (10–16 ft) | $50–$200 hardware | Properties where roof has more obstructions than yard clearing | Clears yard-level obstructions — trees, fences, buildings | Cable run from yard to house · concrete footing needed in some climates |
| Tall Mast / Tower (20–40 ft) | $300–$1,500+ | Dense forest properties · very tall surrounding trees | Clears most tree canopy situations that nothing else can | Professional install often needed · may need permit for ground mount |
| Non-Penetrating Ridge Mount | $60–$120 hardware | Metal or tile roofs where drilling is undesirable | Gets dish to ridge height without any roof penetration | Less stable than drilled mounts in high-wind areas |
| Outbuilding Roof Mount | $35–$80 hardware + cable run | When barn, garage, or outbuilding has better sky than main house | Uses a different property structure with potentially clear sky | Longer cable run required · may need 150-ft extension cable ($30) |
Most roof and wall mounts are DIY-accessible for anyone comfortable at roof height with basic tools. Ground pole mounts are straightforward for anyone with a post-hole digger. Hire a professional when: the installation involves a two-story or steep-pitch roof, requires a concrete base for a tall mast, or involves significant cable routing through finished walls. A local handyman or antenna installer typically charges $200–$400 for a basic Starlink mount job. Professional pole mounts with tall masts and concrete footings run $350–$600 or more. For properties where the dish must clear a forest canopy, a local installer who knows the area’s typical tree heights can advise on the right mast height without guesswork.
The most effective approach for heavily wooded properties is finding the natural opening in the canopy first, then bringing the dish to that location — not starting with the house and trying to raise the dish high enough to clear surrounding trees. Walk your property with the app. Check pond edges, the end of the driveway, clearings between tree clusters, and the roof of any outbuilding that’s closer to an opening. Once you find a spot where the app drops under 10%, calculate the cable run needed to get from that location back to your router. Extension cables (150 feet) handle most situations. For properties where the canopy genuinely surrounds every possible location, a tall pole mast — 20 to 40 feet — may be the only solution. That’s a professional installation job and a $300–$1,500+ investment, but it often delivers the performance improvement that nothing else can match.
Open the Starlink app, go to Statistics, and look at the Outages log. If entries are labeled “obstruction” and appear on a regular schedule, a specific object is in your satellite path. The app’s visual obstruction map shows which direction. Go outside and identify what’s in that direction — it’s almost always one of: a chimney you didn’t notice, a roofline edge above the dish location, a tree branch extending into the clear zone, or an old satellite dish still on the roof. The most common roof-mount mistake: the dish is mounted in a convenient accessible spot rather than the spot with the best sky. Moving a few feet toward the roof peak is often the complete fix. Run the app check from the current dish position versus from the roof peak and compare the percentages.
This is the deciduous tree problem, and it’s extremely common. A site that shows 3% obstruction in February with bare branches can reach 15–20% or more by July when full canopy fills in. The fix is the same as any tree obstruction: raise the dish above the canopy or trim the specific trees that fill the satellite corridor. A ground pole mount that gets the dish above the approximate canopy height is often the cleanest long-term solution for this situation. If you’re planning a new installation in winter or fall, evaluate your candidate locations by panning the app slowly to account for what the trees will look like fully leafed, not what they look like bare. The app estimates based on the tree heights it detects — trust the obstruction percentage it gives for summer conditions, not just what you can see with your eyes in winter.
Rhythmic, predictable drops every few minutes almost always indicate a specific solid object crossing a satellite corridor on a predictable schedule. Open the Starlink app, go to Statistics, and check the Outages log for pattern and label. Then open the obstruction map and look for any red arc or marked obstruction — pay special attention to the north and northeast portions of the map, where the heaviest satellite traffic runs for U.S. customers. Even a thin red mark in those directions causes repeated drops as satellites queue through that corridor. Identify the exact direction in degrees (the app’s map is compass-referenced), go outside, and look at what’s in that direction from the dish location. That specific thing — a chimney, a branch, a utility pole — is what’s causing the rhythm. Remove it, raise the dish above it, or relocate.
The included kickstand is exactly the right tool for this. Set the dish on the kickstand at your candidate location, run the cable inside through a window or door, power everything on, and run the connection for several hours. The app’s real obstruction data — not the pre-installation estimate, but actual observed dropouts — will show exactly how the location performs in real use. Give it at least 24 hours and watch the Outages log across different times of day. This test is Starlink’s own recommendation for validating an installation before committing to permanent hardware. The kickstand is rated for temporary outdoor use; it’s not meant for permanent weathered exposure, but it handles a multi-day test with no problem. If the location tests well, permanently mount there. If it doesn’t, you haven’t drilled anything.
📍 Find Starlink Installers & Mount Hardware Near You
Use these buttons to find Starlink installation professionals, hardware suppliers, and antenna shops near your location. Always run the obstruction check with the app before booking any installation work — location selection is more important than hardware choice.
📌 Check your obstruction score first at starlink.com — the free app gives you the location data any installer needs to do their job.
Starlink app: available free on iOS and Android · search “Starlink” in your app store
This is an independent informational guide and is not affiliated with, sponsored by, or endorsed by SpaceX or Starlink. Obstruction thresholds, app interface details, mount hardware pricing, and installation costs are approximate and subject to change. Performance impacts of obstructions vary by location, satellite density in your region, and the specific direction and type of blockage. Always use the official Starlink app at your exact planned mount location for the most accurate pre-installation assessment. Consult a qualified installer before undertaking any roof work, tall pole installation, or electrical work associated with a Starlink installation.