Wiring a House for Ethernet Without Tearing Down the Walls

A good home network does not have to mean chasing every wall, lifting every floor or turning the house into a building site.

In many UK homes, Ethernet can be installed surprisingly discreetly by using:

loft spaces

cupboards and wardrobes

suspended floors

existing service routes

surface trunking

external walls

garages and utility spaces

The key is to plan the entire network before drilling the first hole.

Done properly, Ethernet can give you:

more reliable broadband throughout the house

better gaming latency

stable video calls

faster connections to NAS storage

reliable smart TVs

better-positioned Wi-Fi access points

Power over Ethernet for cameras and access points

The best home networks usually use:

Ethernet for fixed devices and Wi-Fi for mobile devices.

It is not Ethernet versus Wi-Fi.

Ethernet is often what makes excellent Wi-Fi possible.

Start With the Network You Actually Want

Do not begin with:

“I need one cable behind the television.”

Walk around the property and think about what may need connectivity over the next five to ten years.

Possible locations include:

home office

television

games console

desktop PC

NAS

wireless access points

CCTV cameras

video doorbell

garden office

loft conversion

bedrooms

media cabinet

smart-home equipment

solar/battery equipment

If getting a cable into a particular location requires significant effort, consider running two cables while the route is accessible.

The cable itself is usually cheap.

Getting access again later is what costs time.

Use a Star Topology

For most homes, the cleanest design is to run each Ethernet cable back to one central location.

That is known as a star topology.

For example:

Bedroom socket → network cupboard

Office socket → network cupboard

TV socket → network cupboard

Access point → network cupboard

At the central location, the cables terminate into a:

patch panel

network switch

router/firewall

This is much cleaner than daisy-chaining random switches around the house.

Choose the Network Location Carefully

Good locations might include:

utility cupboard

under-stairs cupboard

garage

plant room

office cupboard

communications cabinet

You need:

mains power

ventilation

space for equipment

easy maintenance access

broadband connection nearby

room for a patch panel and switch

Avoid putting the router and switch inside a tiny sealed cabinet.

They generate heat.

Also remember:

the best place for the network cabinet is rarely the best place for Wi-Fi.

That is why wired ceiling-mounted access points are so useful.

Cat6 or Cat6A?

For most ordinary homes, I would use solid-copper Cat6 as the default.

Cat6 is well suited to:

1GbE

2.5GbE

5GbE

many shorter 10GbE runs

PoE devices

Wi-Fi access points

CCTV

Cat6A becomes more attractive if you specifically want:

10GbE over longer runs

substantial PoE use

particularly demanding future expansion

a premium structured-cabling installation

But Cat6A is:

thicker

harder to bend

more difficult to terminate

harder to hide behind skirting and in small voids

For many houses, installing good-quality Cat6 neatly is better than forcing bulky Cat6A into unsuitable routes.

Avoid CCA Cable

This deserves a very clear warning.

Use:

solid copper cable

for permanent structured cabling.

Avoid cheap:

CCA — Copper Clad Aluminium

cable.

CCA has higher electrical resistance than proper copper cable and is particularly undesirable where Power over Ethernet is involved.

Fluke notes that inexpensive non-compliant CCA cabling presents greater resistance and balance concerns for powered Ethernet applications.

If a reel of cable is dramatically cheaper than every reputable Cat6 product, check what it is actually made from.

Understand the 100-Metre Rule

Standard structured Ethernet cabling uses a maximum 100-metre channel.

That normally consists of:

up to 90 metres permanent link

plus:

patch leads at each end

Fluke describes the standard channel model as a 90 m permanent link within a 100 m overall channel.

In a normal house, you are unlikely to get anywhere near that limit.

But it is still worth understanding for:

large properties

garden offices

outbuildings

For unusually long links, fibre may become the better option.

Method 1: Use the Loft

If you have an accessible loft, this is often one of the cleanest routes.

A typical layout is:

network cupboard → loft → across house → down into rooms

This works particularly well for:

upstairs bedrooms

ceiling-mounted Wi-Fi access points

CCTV

loft office

drops through wardrobes or cupboards

Use suitable support rather than simply throwing cables loose across the loft floor.

Keep them away from:

sharp edges

hot pipes

areas where boxes will crush them

loft ladders

walkways

Dropping Cable Down a Hollow Wall

Stud walls can sometimes make very clean Ethernet installations possible.

A cable can be dropped from the loft into a wall cavity and terminated behind a proper data faceplate.

Before drilling, establish what is inside the wall.

Potential hazards include:

mains electricity

plumbing

gas

heating pipes

fire barriers

horizontal noggins

Do not assume that because the wall sounds hollow, it is empty.

Use suitable detection equipment and inspect the surrounding area carefully.

Method 2: Use a Suspended Floor

Many older British houses have suspended timber floors.

That can provide an excellent cable route.

Ethernet can travel:

under the floorboards → across the room → up behind furniture or into a wall

Keep cabling away from:

damp ground

heating pipes

sharp masonry

areas accessible to rodents

moving floor components

Do not block the ventilation beneath a suspended timber floor.

That airflow is important for controlling damp.

Method 3: Hide Cable Behind Skirting Boards

In some rooms there is enough space behind removable skirting to conceal Ethernet.

This can work well if:

the cable is not crushed

bends remain gentle

screws/nails cannot penetrate it

there is appropriate separation from electrical cabling

Do not jam Cat6A into a cavity that is barely deep enough.

Damaging the cable geometry can reduce performance.

If you install cable behind skirting, record or photograph the route before replacing the timber.

That can prevent somebody driving a screw straight through it five years later.

Method 4: Use Surface Trunking

Surface trunking is underrated.

Modern mini-trunking can look tidy when installed along:

skirting lines

ceiling edges

door frames

cupboard interiors

It avoids destroying finished plaster and makes later changes much easier.

For many retrofit jobs:

10 metres of neat trunking

looks considerably better than:

10 metres of poorly repaired wall chase.

Method 5: Run the Cable Externally

Sometimes the easiest route between floors or distant rooms is outside the building.

For example:

network cupboard → external wall → upstairs → back inside

This can be an excellent retrofit technique.

But use cable suitable for the environment.

Ordinary indoor PVC Ethernet cable should not simply be exposed permanently to:

ultraviolet light

rain

large temperature changes

Use an outdoor-rated cable or suitable protected containment.

Where the cable enters the building:

slope entry holes appropriately

seal against water

avoid creating a moisture path

And do not blindly drill through an outside wall without checking for services.

Garden Offices Need More Thought

A garden office might seem like:

just run Ethernet outside.

But separate buildings introduce extra considerations.

Depending on distance and electrical arrangements, fibre optic cable may be preferable.

Fibre provides electrical isolation and avoids problems associated with metallic data connections between buildings.

For a simple attached extension, copper Ethernet may be completely reasonable.

For a detached outbuilding, particularly where it has its own electrical supply, get proper advice rather than automatically burying Cat6.

Keep Data Cabling Away From Mains

Do not strap Ethernet cable tightly to mains wiring just because both need to travel in the same general direction.

Current UK wiring guidance requires appropriate segregation between communications cabling and electrical wiring, depending on the installation and containment used. BS 7671 specifically addresses separation of communications cabling from other wiring systems.

IET ICT guidance also gives separation approaches based on the electrical installation and whether suitable barriers or containment are present.

For DIY work, a sensible rule is:

keep network and mains cabling physically separate rather than running them tightly together for long distances.

If routes must share containment or pass close to electrical installations, use appropriate systems and professional advice.

Crossing Power Cables

Where network cabling has to cross mains wiring, crossing at roughly:

90 degrees

is generally preferable to running both cables parallel together.

Again, this is not simply about interference.

The UK installation needs to maintain appropriate electrical safety and segregation.

Do not modify fixed mains wiring merely to make Ethernet installation easier unless you are competent and authorised to do so.

Be Careful When Drilling

The Ethernet cable is not the dangerous part.

Drilling into:

mains cable

water pipe

gas pipe

is.

Before making holes in:

walls

floors

ceilings

consider what services may exist there.

The current UK Wiring Regulations include requirements around protection of concealed electrical cables from mechanical damage.

If the proposed route requires substantial work around fixed electrical installations, bring in a competent installer.

Use Solid Cable for Permanent Runs

Structured cabling is normally built using:

solid-conductor cable

for the fixed permanent link.

Then use flexible stranded patch leads from:

patch panel → switch

wall socket → device

Do not run a 30-metre retail patch cable through the walls simply because it already has RJ45 plugs fitted.

Permanent structured cabling is cleaner, easier to maintain and easier to test.

Terminate Into Keystone Jacks or a Patch Panel

Avoid crimping RJ45 plugs directly onto every permanent cable unless the application genuinely requires it.

A better structured installation is:

solid cable → keystone jack/wall socket

and at the other end:

solid cable → patch panel

Then use short patch leads.

Advantages include:

easier maintenance

less movement of the permanent cable

easier testing

cleaner labelling

easy replacement of damaged patch leads

Use the Same Wiring Standard at Both Ends

Ethernet jacks are normally terminated using:

T568A

T568B

Either can work.

What matters most in a normal home installation is:

use the same scheme consistently at both ends.

Do not terminate one end as T568A and the other as T568B by accident.

Most UK installations commonly use T568B, but consistency is the important part.

Don't Untwist the Pairs More Than Necessary

Twisted pairs are twisted for a reason.

The twist helps control:

crosstalk

interference

signal integrity

When terminating a jack:

maintain the twists as close to the termination as practical.

Do not unravel several centimetres of conductors because it looks easier to punch down.

Respect Bend Radius

Do not:

kink the cable

staple it tightly

fold it around a sharp corner

pull it aggressively

Cat6A in particular can be relatively stiff.

A cable can have perfect electrical continuity and still perform badly because installation damage altered its transmission characteristics.

Use broad bends and appropriate cable supports.

PoE Changes the Cabling Conversation

Power over Ethernet lets the same cable carry:

data + electrical power

This is extremely useful for:

Wi-Fi access points

IP cameras

VoIP phones

door access systems

Modern PoE can deliver substantial power.

Fluke notes that adding DC power to Ethernet introduces additional requirements around conductor resistance and resistance balance.

Higher-powered PoE can also increase cable temperatures, particularly in large tightly packed bundles.

In a small house with a handful of PoE cables, this is unlikely to become an extreme problem.

But it is another reason to buy decent cable and not create enormous tightly compressed bundles.

BS 7671 Now Explicitly Addresses PoE

This is a useful 2026 addition.

The current BS 7671:2018+A4:2026 includes new material specifically relating to Power over Ethernet as well as functional earthing/bonding for ICT equipment.

That reinforces an important point:

Once structured cabling starts interacting closely with powered infrastructure and fixed electrical installations, it should be treated as a proper installation rather than simply “some internet cables”.

Put Ethernet Where Wi-Fi Access Points Need It

One of the smartest things you can do while installing Ethernet is provide cabling for ceiling-mounted access points.

Instead of relying on:

one router hidden beside the broadband socket

you can install wired access points in better positions.

For example:

ground floor AP

and:

first floor AP

with both connected back to a central PoE switch.

That gives you:

better Wi-Fi coverage

stronger roaming

less reliance on wireless mesh backhaul

cleaner installation

Running Ethernet for access points can therefore improve the devices that remain wireless.

Wire Fixed Devices Where Practical

Good candidates include:

smart television

games console

desktop PC

NAS

CCTV

home office dock

access points

Every high-bandwidth fixed device moved onto Ethernet reduces competition for Wi-Fi airtime.

Do not wire devices purely because you can.

But where a device never moves and Ethernet is convenient, wired connectivity is usually the more predictable option.

Think About 2.5GbE

You do not necessarily need 10GbE everywhere.

For many modern homes, 2.5 Gigabit Ethernet is becoming an excellent middle ground.

It can be useful for:

Wi-Fi 6/6E/7 access points

NAS

desktops

multi-gigabit broadband

and can often operate over good existing Cat5e/Cat6 cabling depending on the run and installation quality.

So when buying a new switch, consider whether at least some:

2.5GbE ports

would be useful.

10GbE Is More Useful in Certain Places

Full 10GbE makes the most sense for things such as:

NAS

workstation

video editing

large backups

server links

A sensible home installation might therefore use:

1/2.5GbE for most rooms

and:

10GbE between workstation/NAS/core equipment.

There is little value in paying for 10GbE interfaces behind every television purely for bragging rights.

Leave Spare Cable

At termination points, leave a sensible service loop.

Do not stretch the cable so tightly that the termination has exactly:

0 cm spare.

A little extra length makes it much easier to:

reterminate

move a patch panel

replace a jack

repair damage

Do not leave enormous coils either.

Just leave enough for future maintenance.

Label Everything Before You Forget

At the network cabinet, labels such as:

Cable 1

Cable 2

Cable 3

become useless very quickly.

Use labels such as:

Office-01

Office-02

Lounge-TV

Bedroom-AP

Front-Camera

Loft-AP

Label:

both ends

before disappearing into the loft.

A few minutes of labelling can save hours later.

Test Every Cable

Do not assume:

link light = perfect installation.

At minimum, use a cable tester that verifies:

continuity

pair order

opens

shorts

crossed pairs

Better testing can also determine:

cable length

split pairs

network speed capability

PoE availability

For professionally installed structured cabling, certification testing can confirm whether the link actually meets its intended category specification.

Fluke distinguishes the standard 90-metre permanent link and 100-metre channel specifically in its cabling certification guidance.

Testing should be part of the installation.

Not something you do only after a device refuses to connect.

A £10 Tester and a Cable Certifier Are Not the Same Thing

A basic continuity tester can tell you whether:

pin 1 reaches pin 1

and so forth.

That is useful.

It does not prove the cable supports:

Cat6 performance

10GbE

PoE correctly

low crosstalk

Professional cable certification equipment measures transmission characteristics against defined cabling standards.

For a DIY home network, basic testing may be perfectly adequate.

For a professional installation, certification can provide much greater confidence.

Plan the Patch Panel Properly

For a larger house, consider a:

12-port

24-port

48-port

patch panel depending on requirements.

Then use:

patch panel → short patch lead → switch

This gives you a central point where any room can be:

connected

disconnected

repurposed

moved between switches

without touching the permanent cable.

It also looks considerably more professional than 20 loose cables with plugs hanging from a hole in the wall.

Don't Put a Network Cabinet in a Boiling Loft

Lofts are convenient for cables.

They are not always suitable for active equipment.

A UK loft can become extremely hot in summer and cold/damp in winter.

Your:

switch

router

UPS

NAS

may not appreciate that environment.

Use the loft primarily as a cable route unless environmental conditions are appropriate for the equipment.

A ventilated indoor cupboard or utility location is often better for the core hardware.

Use Conduit Where Future Changes Are Likely

If you are doing renovation work and have access to walls or floors, one of the best things you can install is not another cable.

It is:

empty conduit with a draw cord.

Technology changes.

A usable pathway allows tomorrow's cable to be pulled without reopening the building.

For routes such as:

garden office

media room

office

loft

conduit can be more valuable than guessing exactly what cable will be needed 15 years from now.

Document the Installation

Take photographs before:

plasterboard goes back

skirting is replaced

flooring is refitted

insulation covers the cable

Record:

cable routes

port labels

patch-panel mapping

switch connections

access-point locations

Years later, you will be extremely glad you did.

A Practical Home Network Example

Suppose a two-storey house needs Ethernet for:

office

lounge TV

NAS

two Wi-Fi access points

four cameras

Instead of chasing walls everywhere:

Central cupboard

Contains:

router/firewall

16-port PoE switch

patch panel

UPS

Loft route

Carries cables to:

upstairs access point

upstairs rooms

exterior CCTV

Suspended floor

Carries cables to:

office

lounge

External route

Used only where internal access is impractical.

The house gets a full structured network with relatively little visible disruption.

That is the objective.

What I Would Install in a Typical Home

For a reasonably substantial retrofit today, I would generally consider:

solid-copper Cat6

keystone wall outlets

central patch panel

managed 1/2.5GbE PoE switch where useful

wired Wi-Fi access points

labelled and tested runs

plus conduit on any route that is particularly difficult to access again.

Cat6A would be reserved for places where the additional capability genuinely justifies its size and installation difficulty.

The Home Ethernet Checklist

Before drilling:

1. Decide which devices actually need Ethernet.

2. Pick a central network location.

3. Plan cable routes through lofts, floors, cupboards or externally.

4. Use genuine solid-copper Cat6/Cat6A.

5. Keep suitable separation from mains wiring.

6. Use outdoor-rated cable or containment outdoors.

7. Protect cables from heat, moisture and physical damage.

8. Use wall jacks and a patch panel for permanent runs.

9. Maintain sensible bend radius and pair twists.

10. Consider PoE for APs and CCTV.

11. Run spare cables where access is difficult.

12. Label both ends.

13. Test every link.

14. Photograph and document concealed routes.

The key principle is:

A good structured network is planned around pathways and termination points—not around where the broadband router happens to sit today.

How Hamilton Group Can Help

Hamilton Group can help businesses and home-working environments with:

Ethernet cabling

structured networks

Wi-Fi

switches

Power over Ethernet

wireless access points

CCTV networking

home offices

garden-office connectivity

network troubleshooting

A properly designed wired network can provide the foundation for faster, more reliable Wi-Fi and more dependable fixed devices without turning the property into a major renovation project.

Visit hgmssp.com or call 0330 043 0069 to discuss network and Wi-Fi installation.