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Sun Tunnel For Flat Roof - Monodraught Sunpipe®

(6 reviews) Free delivery
  • £194.00

  • Inc. VAT £232.80
  • Price on request
  • Not available in this size

Product Code: Monodraught Flat Roof

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Monodraught Flat Roof Sun Tunnel Kit

The SUNPIPE natural daylight sun tunnel for flat roof directs sunlight into a room from roof level. The SUNPIPE collects daylight using a patented Diamond dome, using a silverised PVD coated mirror-finished aluminium tube to transfer light to a room, with a ceiling diffuser evenly distributing the light around the room. SUNPIPES are suited to almost any application, and have been installed anywhere from residential bedrooms to the Olympic Handball Arena in London.

All sunpipe systems are guaranteed for 10 years


Available in 4 different sizes, the larger the size the more light the sun tunnel for flat roof will pass.

Area to be Lit(To a Normal Daylight Condition) SUNPIPE Size
Approx 7.5 m2 (80 Sq. ft.) 230 mm (9” dia)
Approx 14 m2 (150 Sq. ft. 300 mm (12” dia)
Approx 22 m2 (230 Sq. ft.) 450 mm (18” dia)
Approx 40 m2 (430 Sq. ft.) 530 mm (21” dia)

Tables from research conducted by the University of Nottingham showing output of a 300 mm dia. SUNPIPE to a flat roof application.

Sun Tunnel for Flat Roof

Monodraught sun tunnels are a revolutionary new way to get natural daylight from rooftops into interiors to brighten dark rooms and underground spaces. These sun pipes are suited to almost any application, and have been installed anywhere from residential bedrooms to commercial properties.

Light Output

Sun tunnel light output

Extension Calculation

Overall Length (‘X’) No. of Extensions
Up to 600 mm (4 ft) None
Up to 1200 mm (4 ft) One
1200 mm (4 ft) to 1800 mm (6 ft) Two
1800 mm (6 ft) to 2400 mm (8 ft) Three
2400 mm (8 ft) to 3000 mm (10 ft) Four
2300 mm (10 ft) to 3660 mm (12 ft) Five
Over 3660 mm (12 ft) add one length per extra 610 mm (2ft)


  230 300 450 530
SUNPIPE Diameter [mm] 230 305 457 535
Roof and Ceiling Opening Ø [mm] 250 320 470 550
Extensions calculation

Lengths & Bends

Smaller sizes have a recommended total maximum pipe length of 8 m. Larger sizes allow for longer lengths to be used.

There is a 12% reduction of light output for each 45° bend used and there is a 6% reduction in light transmission for every metre of SUNPIPE.

30° & 45° adjustable elbows can be used with all SUNPIPE applications to direct daylight to where it is required.


Sun Tunnel for flat roof
Polycarbonate Diamond Dome

1. Acrylic Diamond Dome

As Standard we use high impact acrylic in our patented Diamond domes which maximises the penetration of natural daylight.

Galvanised flashing plate

2. Galvanised Flashing Plate and ABS Collar

Galvanised Flashing plate manufactured from 0.8mm galvanized mild steel which is corrosion resistant and suitable for felt, membrane and asphalt roof finishes. Supplied with an ABS (acrylonitrile-butadiene styrene) collar for dome to fit on to.

Plain pipe

3. 610 Plain End Pipe

The 610mm plain end pipe is manufactured from 0.5mm thick anodized aluminium pipe and is coated with MIRO SILVER® 27/427OAG to maximise reflections and limit light diffusion.


4. Plywood Backing Plate/Template

The 4mm thick plywood backing plate/template can be used to 'mark out' the opening at ceiling level and to provide additional structural fixing for the diffuser.

Ceiling extension

5. 250 Ceiling Extension

The 250mm ceiling extension is manufactured from 0.5mm thick anodized aluminium pipe and is coated with MIRO SILVER® 27/427OAG to maximise reflections and limit light diffusion. This provides a permanent joint between the diffuser and plain end pipe.

Ceiling Diffuser

6. Double Glazed MicroPrism Ceiling Diffuser

The double glazed microprism diffuser is designed to offer excellent thermal performance whilst ensuring maximum spread of natural daylight within the space and an even light distribution. The trim is supplied in white as standard. 230mm Sunlumes are provided with a 3-piece polycarbonate diffuser.



Reduced Carbon Emissions


  • Increased achievement rates
  • Reduced fatigue factors
  • Improved health and attendance
  • Enhanced general development

Health Care

  • Combats the condition of SAD
  • No maintenance no disruption
  • Typical payback period of 5 - 6 years


  • Addition of skylights proven to produce a 40% increase in sales


  • 20% increase in employee output
  • Reduced absence because of sickness
  • Reduced instances of Sick Building Syndrome (SBS)

Improved Health

  • Boosted levels of Dopamine, Endorphins, Cortisone, Testosterone in men, and Vitamin D

Related Information

Monodraught Installation Instructions (3.16 MB) Download
Delivery Information

Free Delivery to Mainland UK, Delivery charges will apply to other areas of UK. Delivery Costs will update at checkout for other areas of UK.

We aim to Deliver Sun Tunnels in 2-3 working days Monday to Friday.

Deliveries are made by a courier and require a signature. They will usually be delivered between 8am and 5pm Monday to Friday only. Please assist us by ensuring that someone will be available to sign for the goods. Please let us know if you need deliveries outside these times.

Please note we cannot guarantee a delivery time and we will not be held responsible for any losses incurred due to late delivery.


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Chris Atkinson - 12/02/2020

Clear, helpful website, easy ordering and efficient delivery well packaged

Neil Harryman - 10/12/2019

Excellent product, great quality and exceptional service

C Wheeler - 01/10/2018

Couldn't fault the purchasing experience in any way. Helpful, friendly staff who knew what they were talking about and delivery was when they said it would be.
Only minor nigle was that the cardboard container was slightly damaged in transit. Nothing wrong with the goods though, so no complaint.

Keith Weall - 01/10/2018

They helped in the selection of the product. Delivered on time.
The one product that they were out of stock was delivered 24 hrs later

James Hill - 29/08/2017

easy to install, really brightens up my hallway

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