Working with an Installer for Better Signal

Start with a proper diagnosis, not a shopping list

Most disappointing installations begin with the wrong purchase. Someone buys a booster or a tall aerial before anyone has measured what is actually arriving at the property. Before you book an installer, spend ten minutes gathering facts. Walk the rooms where signal matters most and note where calls drop, where pages stall and where the router struggles. If your mobile signal is poor indoors but fine in the garden, that points to building materials rather than distance from the mast. If it is poor everywhere, you may need an external antenna and a clear line of sight towards the transmitter.

Check the official coverage checkers for your postcode, but treat them as a rough guide only. They work on predicted coverage, and rural properties sit in the gaps between predictions. Your installer's job is to replace guesswork with measurement.

Preparing your property before the visit

A little preparation saves a second visit and often a second call-out fee.

• Clear access to the loft, roof space, chimney and any cupboard where cables will run. Installers cannot quote accurately for a loft they cannot see into.
• Photographs of the outside of the property from several angles, including the direction you believe the nearest mast sits.
• Your equipment details, including the make and model of your router and whether it has external antenna ports. Many home broadband routers do not, and that changes the plan entirely.
• A note of any restrictions: listed building status, tenancy agreements, shared access, or a landlord who needs to approve fixings on the building fabric.
• Your priorities in plain terms: reliable voice calls, video calls for work, streaming in the evening, or a stable connection for a home business.

Questions to ask before work begins

A good installer welcomes these. If any question causes irritation, that is useful information.

• Will you carry out a site survey first, and is that charged separately?
• What signal readings are you seeing now, and what do you expect after installation? Ask for figures in dBm rather than vague assurances.
• Which equipment do you plan to fit, and does it meet UK licence exemption rules? Cheap imported boosters can interfere with networks and may have to be removed.
• Will the aerial be pole-mounted or chimney-mounted, and does the height need planning permission? In some rural areas, masts above a certain height require consent.
• What cable will you use, and how long will the run be? Low-loss coaxial cable matters enormously; a long run of thin cable can cancel out the gain of a good antenna.
• How will the installation be earthed and weatherproofed?
• Is the work insured, and is there a written guarantee on both labour and hardware?

What a competent installation day looks like

Expect the installer to test before and after at the same spot, ideally with the same measuring app or meter. A professional will try more than one position for the antenna, because a metre left or right on a rural roof can change everything. Cables should be clipped neatly, routed away from sharp edges, and sealed at every entry point with self-amalgamating tape or proper glands. Connectors should be fitted, not forced.

If a booster or amplifier is used, the gain should be set to suit the incoming signal. Cranked to maximum, a booster amplifies noise as readily as signal and can make things worse. Ask the installer to show you the setting and explain the reasoning.

Verifying the results yourself

Do not accept a quick glance at a signal bar. Test properly, on the day and again a week later.

• Record the readings in several rooms, at the same locations, before and after.
• For mobile, note RSRP (around -80 dBm is strong, -100 dBm workable, -120 dBm poor) and SINR, which reflects quality rather than raw strength.
• For broadband, run speed tests at different times of day, wired and over Wi-Fi, and note latency as well as download speed.
• Make a real call and hold it for several minutes while walking between rooms.
• Test during peak evening hours, when contention on rural networks is highest.

Paperwork, guarantees and follow-up

Ask for a written summary of what was fitted, where, the readings achieved and the guarantee terms. Keep the serial numbers of any booster or antenna. If performance drops after a few weeks, a documented baseline makes a return visit straightforward rather than a debate.

Finally, agree a sensible check-in. A brief call or message after a fortnight is normal practice and gives you the chance to report anything that has not settled. A good installer would rather adjust a setting than lose a recommendation, and in rural areas, recommendations travel further than any advertisement.