FREE UK DELIVERY (Excl. Scotland, West Wales, Devon and Cornwall)

Triangular Rooflight Share
10 year warranty

Starting from £1,346.00 (Excl. VAT)

Customise & buy

Please provide external kerb dimensions.
Other colours, sizes and quantities available on request.

Stock items are usually delivered within 1-2 days
(*subject to availability)

FREE DELIVERY (Excl. Scotland, West Wales, Devon and Cornwall)

£1,398.00 + VAT
Secured by design Secure by Design - Building regulations Part Q compliant solution available, please call: 0116 2610 710
All of our products come with the following features

Duplus Triangular Rooflights

Our unique fixed triangular rooflight uses the same structural silicone glazing techniques as our entire range of rooflights, ensuring a very high-quality product, manufactured at our factory in Leicester. It comes fully watertight with a premium flush glazed and refined aesthetic.

All our shaped rooflights feature fully enclosed double glazed units to eliminate any risk of breakage. Please note that traditional ‘stepped edge’ shaped glass rooflights have a significantly higher vunerability to breakage due to exposed edges.

Advanced Features

Duplus roof lanterns are double glazed in clear HEATSOAKED toughened safety glass as standard.

Options are available:

  • Blue tinted glass
  • Bronze tinted glass
  • Grey tinted glass
  • Obscure finish for privacy
  • High-performance solar control (minimise solar gain (heat) (g) and maximise light transmittance (Lt))


Our fixed rooflight is easy to install. An integral perimeter gasket creates an air and water seal without the need for site applied silicone. The product is secured via screw fixing to the builders kerb externally and a matching cover clip is then applied to conceal the fixings.

Looking for a different style of shaped rooflight? Then just call us on 0116 2610710 or get in touch with your requirements and we’ll be happy to assist.



Yes, we can construct isosceles-shaped triangular rooflights. Just let us know your required dimensions and we can provide you with a quote directly to your inbox.

Material Specifications & U-Value

All our rooflights satisfy the thermal performance criteria defined in the Building Regulations and achieve a high resistance to condensation under normal conditions. We can provide True U-value and Ud-values upon request.

The Duplus rooflight range is tested for weathertightness to BS EN 14351-1:2006 +A1:2010 clauses 4.2, 4.5 and 4.14 – Our test reports are available in our technical section.

As standard, the extruded aluminium perimeter frame is powder-coated RAL 7016 dark grey matt or RAL 9005 black matt. We can offer other RAL colour options upon request.

Our glazing specifications incorporate clear low ‘E’ glass as standard, achieving a centre pane U-value of 1.1 W/m²K.

We deliver our fixed rooflights FULLY ASSEMBLED and fully weathertight. Save time as no assembly on site is required! Furthermore, our completed systems provide significantly higher security compared to kit systems.

“Very friendly and helpful customer service throughout the purchasing process. Very nice and good quality rooflights!”
Why Duplus?
Over 60 years of experience
Order information

For further information and our full terms and conditions, pleasesee our Customer Services page.

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Delivery or collection

All of our rooflights can be delivered around the UK, or you can collect from our factory in Leicester.

Stock items delivered within 48 hours (subject to availability).

Custom sizes normally 20-25 working days (subject to workload at the time of ordering).