Guide · TV & satellite
Loft aerial or roof aerial?
A loft aerial keeps your roof clear, lasts longer and is easier to reach. But it only works where the signal is strong enough to get through tiles, felt and insulation. Here's how to tell which one your home needs.
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The short answer
A loft aerial works well when your home is reasonably close to a transmitter with a clear path to it, and the roof isn't lined with foil-backed insulation or solar panels in the way. If you're a long way from the mast, shadowed by hills or trees, or the roof blocks the signal, you'll need a roof aerial. The only way to know for sure is to measure the signal in the loft itself.
Why a loft aerial gets less signal
Everything between the aerial and the transmitter weakens the signal. In a loft, that includes roof tiles or slates, felt, battens, and sometimes foil-backed insulation, which can block the signal almost completely. Wet tiles absorb more than dry ones, so a loft aerial that works on a dry day may struggle in heavy rain. A roof aerial sits above all of that, usually higher too, which gives it a clearer path.
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When a loft aerial works well
- You're close to a transmitter. Towns like Wymondham, Attleborough, St Neots and Cambourne are only a few miles from a main mast, and loft aerials are often perfectly reliable there.
- The loft faces the right way. A gable end facing the transmitter helps.
- There's nothing metallic in the way. No foil insulation, metal sheeting or solar panels between the aerial and the mast.
- You want to protect the roof. On listed buildings, thatch and fragile chimneys, a loft aerial avoids fixings altogether.
When you need a roof aerial
- You're a long way from the mast. Much of the Fens, the north Norfolk coast and parts of the Essex coast need every bit of signal.
- Hills, trees or buildings are in the way. Height on a roof mast clears obstructions a loft aerial can't.
- Your roof blocks the signal. Foil-backed insulation and some modern roof materials stop it getting in.
- You need to feed several TVs. More signal to start with means more to share between rooms.
The advantages of each
Loft aerial
Out of the weather, so it doesn't corrode, move in the wind or suffer storm damage. Invisible from outside. Easy to reach if anything needs changing. No chimney or roof fixings.
Roof aerial
The strongest, most reliable signal, especially in weak areas. Can be raised on a taller mast to clear obstructions. Easier to point accurately at distant transmitters, and suits higher-gain aerials that wouldn't fit in a loft.
Moving an aerial into the loft
If your roof aerial is old, rusty or loose, it's worth asking whether it could move into the loft. We measure the signal in the loft first. If it's strong and stable, we fit the loft aerial, connect it to your existing cable or a new run, and take the old aerial down. If the loft signal isn't good enough, we'll tell you, and fit a new roof aerial on sound fixings instead.
What about indoor aerials?
Small set-top aerials can work very close to a transmitter, but they're easily affected by people moving around the room, and they rarely give a reliable picture for all channels. For a dependable picture on every TV, a properly aligned loft or roof aerial is the better choice.
How we decide
We take a signal meter into your loft and onto the roof, measure strength and quality from each transmitter that can reach you, and recommend whichever gives a reliable picture with margin to spare in bad weather. If both work, the loft is usually the better long-term choice. See our TV aerial service for more.
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FAQ
Common questions
Free advice, no obligation. Tell us your postcode and what's wrong.
Call 0800 151 2978Does a loft aerial need an amplifier?
Not always. Close to a mast, a loft aerial often works without one. Where the signal is weaker, a small amplifier can help, but it can't make up for a signal that's too weak to begin with.
Will a loft aerial work in a bungalow?
Sometimes, but bungalow lofts are lower and more easily shadowed by neighbouring houses and trees. A signal test in the loft tells us quickly.
Can I have a loft aerial on a listed building?
Often, yes, and it's one of the best ways to avoid altering a historic roof. We test the signal in the loft before recommending it.
Picture problems or security worries? Talk to an engineer.
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