Starlink Grommet Cable Entry¶
A grommet cable entry provides a clean weatherproof way to route the Starlink cable through walls, windows, or existing openings. This guide covers grommet types, installation methods, and UK-specific considerations.
Starlink Grommet Cable Entry Options¶
Grommet cable entries are an alternative to drilling through walls and are particularly useful for UK rented properties where drilling is not permitted. Several grommet types are available for Starlink installations. Window grommet (also called window vent cable pass-through): a foam or rubber strip that seals around the cable and fits between the window and frame when the window is closed. Costs £10-£20 from Amazon UK. Suitable for temporary installations and rented homes. Wall grommet (cable entry wall plate): a plastic or metal plate with a rubber grommet that mounts through a drilled hole. Provides weatherproof seal with IP65 rating. Costs £12-£25 from Screwfix. Soffit grommet: for routing through the roof soffit for roof-mounted dishes. Costs £15-£20. Brick grommet (cavity wall cable entry): includes a wall sleeve that prevents damp bridging in cavity walls. Costs £20-£35. The key consideration for Starlink is the cable connector size -- the grommet must have a large enough opening for the connector to pass through. The Starlink Gen 3 cable connector is approximately 15mm diameter. The Mini detachable USB-C connector is approximately 10mm. Choose grommets with at least 18mm opening for Gen 3.
Installing Different Grommet Types¶
Window grommet installation: 1. Clean the window frame and window edge. 2. Cut the grommet strip to the width of your window. 3. Insert the Starlink cable through the grommet channel. 4. Place the grommet between the window and frame at the chosen position. 5. Close the window firmly to compress the grommet. 6. Check the seal is airtight. Do not use on UPVC windows that rely on tight compression for the locking mechanism. Wall grommet installation: 1. Drill a 25mm hole through the wall at a slight downward angle. 2. Insert the wall grommet sleeve from the exterior side. 3. Apply exterior silicone sealant around the exterior flange. 4. Inside, fit the interior trim plate. 5. Feed the cable through the grommet. 6. The rubber grommet compresses around the cable for a weatherproof seal. For all grommet types ensure the cable has a drip loop before the entry point. Check the grommet seal annually and replace if cracked or degraded from UV exposure. Prices: window grommet £10-£20, wall grommet plate £12-£25, soffit grommet £15-£20, cavity wall grommet £20-£35, all from Screwfix or Amazon UK.
Specifications and Comparison¶
| Grommet Type | Best For | Difficulty | Weatherproof Rating | Price | UK Retailer |
|---|---|---|---|---|---|
| Window grommet | Rented homes, temporary | Very easy | Good (compression seal) | £10-£20 | Amazon UK |
| Wall grommet plate | Permanent wall entry | Medium | IP65 | £12-£25 | Screwfix |
| Soffit grommet | Roof cable entry | Medium | IP65 | £15-£20 | Amazon UK |
| Cavity wall grommet | Cavity walls | Medium | IP65 + cavity seal | £20-£35 | Screwfix |
| Brick grommet sleeve | Brick walls | Medium | IP68 | £15-£25 | Toolstation |
FAQ¶
- Can I use a window grommet for Starlink cable entry?
- Yes, window grommets work well for Starlink. They provide a weatherproof seal when the window is closed on the grommet strip. Best for rented UK homes where drilling is not permitted.
- What size hole do I need for a wall grommet?
- Drill a 25mm diameter hole for most wall grommets. Use a 25mm SDS masonry bit for brick walls. The grommet sleeve should fit snugly in the hole with the flanges on each side.
- Will a grommet entry affect my window seal?
- Window grommets are designed for this purpose and should not affect the window seal when correctly installed. Avoid overtightening the window on the grommet which may stress the UPVC frame.
- Can I use the same grommet for both Starlink and other cables?
- Some larger grommets accommodate multiple cables. Choose a 2-slot or 3-slot grommet if you need to pass TV aerial or other cables alongside the Starlink cable.
- How do I weatherproof a brick grommet installation?
- Apply exterior-grade silicone sealant around the exterior flange where it meets the brick surface. Ensure the grommet has a rubber compression seal around the cable. Check the seal annually for UV degradation. For more information see our Starlink Cable Routing Through Walls.
Last updated: 2026-05-31.
Related Guides¶
External Resources¶
For further information consult authority guidelines at the Which?.