The buildings people most want to work from are the ones that fight Wi-Fi hardest. Thick stone, solid brick, lath and plaster, and floors built long before anyone needed to run a cable between them. Add listed status and the usual answer, drill it and clip it to the wall, is not available either.
We do a lot of this across the North West, from period offices around Ormskirk market place and Southport's Lord Street to converted mills and conservation-area premises on Wirral. Here is what actually works.
Why is Wi-Fi so bad in old buildings?
Modern buildings are largely plasterboard, and a signal passes through them easily. Older buildings are not. The usual culprits:
- Solid masonry. A 500mm stone wall or a double-thickness Victorian brick wall attenuates a 5GHz signal severely. 6GHz is worse.
- Lath and plaster. The plaster itself is not the issue, the metal lath in later versions is.
- Retrofitted insulation. Foil-backed boards added to meet modern efficiency standards are close to a mirror for Wi-Fi.
- Chimney breasts and structural piers. Large blocks of solid material exactly where you would like a signal to travel.
- Deep window reveals and leaded glass. Both reduce what you get from a neighbouring room or unit.
The result is a building where one access point in the middle covers about a third of what you expected, and everyone blames the broadband.
What can you not do in a listed building?
This is the part that surprises people, so it is worth being clear. Listed status protects the whole building, inside as well as out. Alterations affecting its character can require listed building consent, and that includes internal work, not just the frontage.
In practice that rules out a fair amount of standard installation practice: chasing cable into original plaster, surface trunking across a historic interior, drilling through decorative features or structural timbers, and fixing anything visible to a protected facade. A conservation area is different again, chiefly concerned with external appearance, so internal cabling is usually less constrained.
Carrying out work needing consent without it is a criminal offence, not a paperwork slip. If there is any doubt, the council's conservation officer is the person to ask, and they are generally helpful when approached early.
How do you get good Wi-Fi in a period building?
The short version is more, smaller, and cleverly placed, rather than one powerful unit doing everything.
- Survey before you buy anything. In a modern office you can predict coverage reasonably well. In a period building you cannot, because the walls are not consistent. Measuring beats guessing every time.
- Use more access points at lower power. Several modest units, one per problem area, outperform a single strong one trying to punch through masonry, and they hand devices over more cleanly.
- Follow the routes that already exist. Redundant service voids, old bell wire runs, existing conduit, cupboard backs and riser cupboards will usually get you between floors without touching protected fabric.
- Place units in the rooms that matter. Coverage from a corridor into three rooms through solid walls is optimistic. An access point in each room is often less intrusive than the cabling required to avoid one.
- Choose hardware that disappears. Small ceiling units in white or a painted finish read as a smoke detector. Nobody notices them, including planning officers.
- Mesh only where cabling truly is not possible. A wired backhaul is always better. Mesh is the compromise when the alternative is damaging the building, not the default.
What about the rooms you simply cannot reach?
Most period buildings have one: a cellar, a top-floor room over a stone stair, an outbuilding across a yard. The options in rough order of preference are a wired run by another route, a point-to-point wireless link between buildings, a mesh node with the best line of sight you can manage, or accepting that the room gets mobile signal rather than Wi-Fi and planning around it.
Sometimes the honest answer is the last one, and it is better said at survey stage than discovered afterwards.
Wi-Fi in listed buildings, answered
Do I need listed building consent to install Wi-Fi?
It depends entirely on what the installation involves. Placing an access point on an existing surface and running cable through existing voids usually does not. Chasing cable into original plaster, fixing to a protected facade, or drilling through historic fabric may well do. Ask the council's conservation officer before work starts rather than after.
Is mesh Wi-Fi good enough for a period building?
It is a reasonable compromise where cabling would damage the building, but it is not the first choice. Every wireless hop costs throughput, and thick masonry is exactly the environment that punishes hops. Wire what you can reach, and mesh only the parts you genuinely cannot.
Why does my Wi-Fi drop in one particular room?
In an older building it is nearly always a structural cause rather than a fault: a chimney breast, a solid pier, foil-backed insulation added during a refurbishment, or a stone wall between that room and the access point. A survey identifies it in minutes, and the fix is usually an access point on the far side rather than a stronger router.
Can I put an access point outside on a listed building?
Externally mounted equipment on a listed building is the most likely thing to need consent, because it affects appearance. There are usually alternatives, such as mounting inside a window reveal or in an outbuilding, that achieve the same coverage without touching the protected elevation.
Is a conservation area the same as being listed?
No, and the difference matters here. Conservation area status is mainly concerned with external appearance and the character of the area, so internal cabling is usually far less constrained than in a listed building, where the interior is protected too.
How we approach it
We survey first, plan the routes around what the building will allow, and specify hardware that is not an eyesore. Where consent might be needed we say so before quoting rather than discovering it mid-install, and we are used to working with conservation officers and managing agents.
If you are in an older building and the Wi-Fi has never been right, that is a survey rather than a guess. Have a look at networks and Wi-Fi, or read our piece on the mistakes that cause most office Wi-Fi problems.