(Hallways, lofts, bathrooms, landings & more)
Sun tunnels are one of the simplest and most cost-effective ways to brighten dark areas in UK homes. Because they bring natural daylight into spaces where windows aren’t possible, they’re especially useful in internal rooms and narrow layouts commonly found in British properties.
This guide explains the best rooms for sun tunnels, how much light you can expect and what type of tunnel works best in each area.
Why some rooms need sun tunnels more than others
Many UK homes include areas that feel dim or enclosed because they lack an external wall for a standard window. These spaces often rely on artificial lighting even during the day. Installing a sun tunnel introduces free natural light, improving comfort and reducing electricity use without major building work.
You’ll benefit most from a sun tunnel when a room is:
- internal or partially internal
- positioned in the middle of the floorplan
- narrow (typical in Victorian/Edwardian homes)
- used frequently but often feels gloomy
- windowless or shadowed by another part of the house
Sun tunnels are also ideal where a full roof window or skylight isn’t possible due to structural constraints.
Best rooms for sun tunnels
Below is a room-by-room breakdown of where sun tunnels work best and why.
1. Hallways
Hallways are some of the darkest spaces in British homes, especially terraced and semi-detached houses where internal corridors run through the centre of the property.
Why hallways suit sun tunnels
- They often have no external walls for windows
- A sun tunnel brightens the entire length of the corridor
- It creates a welcoming entrance, improving first impressions
- It reduces dependency on artificial lighting throughout the day
Recommended tube type
- Rigid tunnels for maximum brightness
- Flexible tubes if the loft layout is obstructed
2. Bathrooms (especially internal bathrooms)
Internal bathrooms can feel closed-in, and they often rely solely on extractor fans and artificial lighting.
Benefits of sun tunnels in bathrooms
- Introduce bright, natural light without compromising privacy
- Reduce mould risk by improving daylight exposure
- Make small bathrooms feel larger and more open
What to consider
- A short, straight run gives the best performance
- Proper insulation helps prevent condensation
- Flat roof bathrooms benefit from dome-style systems
3. Landings
Landings often sit in the centre of the home with no direct access to windows.
Why landings benefit from sun tunnels
- Even small sun tunnels can flood a landing with light
- They improve visibility for stairs
- They brighten the transition space between floors
Recommended system
- Rigid tunnels for bright daytime light
- Small-diameter options (10″ / 250mm) usually suffice
4. Lofts & loft rooms
Loft rooms often have angled ceilings and awkward layouts. Some lofts rely on a single roof window, leaving corners still dim.
Why sun tunnels work well in loft spaces
- They supplement existing roof windows
- They help illuminate walkways around loft stairs
- They brighten storage areas and hobby rooms
Placement ideas
- Above loft stairs
- Above workspaces
- In angled ceilings with short roof-to-ceiling distance
5. Utility rooms
Utility rooms are commonly tucked away and windowless.
Benefits
- Improve visibility for laundry tasks
- Make small utility spaces feel far less cramped
- Reduce the need to keep lights switched on all day
Suitable tunnel type
- Flexible tunnels work well if the run is short
- Rigid provides more brightness for larger rooms
6. Walk-in wardrobes & storage rooms
Sun tunnels add significant usability to windowless storage spaces.
Why they’re ideal
- Reveal colour and clothing detail naturally
- Prevent that “dark cupboard” feeling
- Reduce reliance on artificial lighting
7. Stairwells
Stairwells often feel gloomy, especially in older houses.
Benefits
- Improved safety through better visibility
- A brighter, more welcoming feel between floors
- Works well even with long tube runs (rigid recommended)
Room suitability comparison table
| Room Type | Suitability | Recommended Tube | Notes |
|---|---|---|---|
| Hallways | Excellent | Rigid | Works extremely well in narrow spaces |
| Bathrooms | Very good | Rigid or Flexible | Insulation important |
| Landings | Excellent | Rigid | Small diameter works fine |
| Lofts | Good–Excellent | Rigid | Ideal for angled ceilings |
| Utility rooms | Very good | Either | Brightness depends on room size |
| Cupboards/wardrobes | Excellent | Flexible | Short runs ideal |
| Stairwells | Very good | Rigid | Improves safety and visibility |
How many sun tunnels do you need?
Typical recommendation:
- Small rooms: 1 tunnel (250–350mm)
- Medium rooms: 1 rigid tunnel (350mm+)
- Large spaces: 2 tunnels spaced evenly
A professional installer can assess tube length, roof angle and light direction to determine the ideal size.
What diameter sun tunnel should you choose?
| Room Size | Recommended Tunnel Size |
|---|---|
| Small rooms, en-suites | 10″ (250mm) |
| Medium hallways, landings | 14″ (350mm) |
| Larger rooms, open lofts | 22″ (550mm) |
Rigid systems always provide more light per diameter.
Get free quotes for sun tunnel installation in your home
If you want to brighten a hallway, landing, bathroom, loft or stairwell, you can receive up to four free quotes from vetted UK installers. They can check your loft layout, measure the roof angle and recommend the perfect diameter and tube type for your rooms.
