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Aluminium Bi-Fold Doors

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Aluminium Lantern Roofs

Start Your Lantern Roof Quote

Choose Your Product

To start, simply choose the home improvement solution you are after. Whether you’re looking for aluminium bi-fold doors or aluminium roof lanterns, it’s easy across the board.

Receive Your Quote

A member of our specialist team will be on hand to offer you a bespoke quote, tailored to your exact specifications to make things as cost-effective as possible.

Place Your Order

With your product choice and personal quote in tow, complete the process by placing your order. We will then get exactly what you ordered to you as soon as possible.

Choose Your Opening Style

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Bfd 404

Open Out

Outside View

Bfd 404

Open In

Outside View

Enter Your Measurements

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Aluminium

Please enter your measurements to see the available configurations

    Choose Your Configuration

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    External Frame ColourExternal Capping Colour

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    Internal Frame ColourInternal Capping Colour

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    Lantern grey magic

    *For illustrative purposes only

    Configure Options

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      Your Quote Details

      Images for illustration purposes only

      Product
      Width
      Height
      Configuration
      External Frame Colour
      Internal Frame Colour
      External Capping Colour
      Internal Capping Colour
      Main Handle Colour
      Hinge & D Handle Colour
      Opening Style
      Glazing (Loose)
      External Cill
      Threshold (Excluding Cill)
      Head Vent
      Delivery
      Frame Extensions
      PRICE including VAT

      You’re So Close to Saving on Your Bi-Fold DoorsLantern Roofs!

      Great Savings Fast Lead Times
      Easy Ordering Process Secure Payments

      Highly Accredited Products

      Yale logo Secure by design Bsi alt logo

      Durable & Energy Efficient

      The high performance polyamide bridge that is installed into the profile of our aluminium bi-fold doors upholds impressive standards of insulation. This design works to increase the heat retention of your property, ensuring warm air stays inside for longer.

      • Unrivalled security from the Yale lock design
      • Impressive durability for quality that lasts
      • Fixing Tabs for secure and efficient fitting
      • Compliant with modern door designs
      • Centre gearbox with anti-drill plates
      • Adjustable design for the perfect fit
      • Rounded edges for complete safety
      • Secured by Design approved
      • PAS3621:2011 approved

      Durable & Energy Efficient

      Aluminium lantern roofs are a cutting-edge home improvement solution, offering homeowners the opportunity to bring more light into their home. The market-leading design that we offer has been designed for better performance and aesthetics.

      • 66% smaller ridge, offering better aesthetics than standard lantern designs.
      • Premium grade aluminium for a contemporary, eye-catching appearance.
      • Up to 65% more thermally efficient than other aluminium roof lanterns.
      • 20° pitch and discreet cappings are installed for a crisp, clean look.
      • A range of designs, including 2-way, 3-way or contemporary.
      • Quick and easy to install.

      Installation Guide

      Installation Guide

      Delivery Information

      Fleet

      Our Nationwide delivery service provides fast and effective transportation of your new bifold door.

      All of our bifold doors will arrive ready assembled with the glass loose, unless ordered over 6300mm and or 7/8 panes; in which case, they will be delivered flat packed ready for you to assemble on site.

      Please be mindful of delivery access (17.5 tonne lorries typically) and ensure there are capable people to safely unload and take delivery of your new bifold door.

      Weights vary but typically require three people to take delivery of the product.

      Our nation-wide delivery service provides fast and effective transportation of your new lantern roof.

      All of our lantern roofs arrive flat-packed with the glass loose and ready for you to assemble on site.

      Please be mindful of delivery access (17.5 tonne lorries typically) and ensure there are capable people to safely unload and take delivery of your new bifold door.

      Weights vary but typically require three people to take delivery of the product.

      Frequently Asked Questions

      Bi-fold doors work by folding in on themselves in a concertina motion, sliding along a track mechanism to offer an unobstructed opening. This is made possible by a multi-wheeled carriage that allows for smooth operation.

      Aluminium has proven itself to be a modern, high performance alternative material to uPVC.

      It is more durable, matches the aesthetics of wood, and has slimmer frames. Aluminium doesn't expand as much, requires less maintenance and is inherently stronger than alternative materials.

      The bi-fold doors that we offer can be configured to open in a wide array of options, including:

      • Opening in
      • Opening out
      • Stacking from the left or the right
      • Opening in the centre, from the end or in between

      Whatever your project, we will have something to suit.

      The pitch of our lantern roofs is fixed at a 20° all round. This is to ensure structural integrity in the face of heavy snow, wind and rain loads; it also allows us to offer a roof that achieves a beautifully stylish appearance.

      Every element of the Stratus Thermal lantern roof has been designed to be exceptional. From the low profile 20˚ pitch that allows us to use purpose designed capping that keep sightlines to a minimum - and your view of the sky maximised - to the discreet black finish of our perimeter beam, that ensures if you view the lantern from above all you’ll see is glass and a discreet shadow line. Stratus is high-quality British engineering at its very best.

      Recent innovations allow our lantern roofs to provide maximum thermal efficiency. Our roofs feature polyamide nylon, glass composite thermal breaks to achieve a standard of performance that is 65% more efficient than other roofs.

      Stratus Aluminium Lantern Roofs Retail Brochure

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      Glazing Options

      All our bifold doors are bespoke, so whatever glazing unit size you specify, you can be confident that they have been specifically designed to allow for this.

      The standard specification includes a thermally efficient 28mm double glazed toughened unit incorporating a warm edge spacer bar, energy efficient glass and argon gas, which when fitted in the bifold will give an overall u-value of 1.8 W/m2K.

      Double
      Why you might want to consider upgrading to triple glazing

      The main advantage triple glazing has over the standard double glazing is increased insulation as they are more efficient at keeping the heat in, so can make your home feel warmer. Using triple glazed units in your bifold will improve the overall u-value to 1.4 W/m2K.

      Triple

      In the winter your home will feel warmer as less heat will escape through the units and in the summer, you will feel cooler as less radiant heat will enter your home. A further advantage is that the extra layer of glass can reduce external noise pollution and improve the acoustics, making it a beneficial choice for many urban areas.

      It is also worth bearing in mind that triple glazed units do weigh more than the standard double-glazed units so the doors can will require more force to operate and as you can imagine there is an additional cost so you will need to consider whether the extra warmth and noise reduction outweighs the initial higher cost of the triple glazed units.

      External Cill Options

      Most bifold doors will need an external cill fitting which is a separate aluminium extrusion like those fitted on most external windows. They are designed to both cover and protect the brickwork that the doors sit on by allowing water to project away from the top and face of the bricks to avoid long term water damage.

      There are a variety of cill widths available, 150mm, 190mm and 225mm, the most common one used is the 150mm cill which is suitable if your doors are going to be fitted level with the internal edge of the outside course of bricks, with most bricks being 100mm wide this means the cill projects 50mm past the face of the bricks which is sufficient for the water to drain away from the brick face. If the frame is being fitted further inside the cavity wall, you may wish to choose a wider cill so that you get sufficient projection to allow any water to run off, as a guide we recommend that this distance should be 40mm or greater.

      150mm cill

      150mm

      This is our standard cill and leaves a 50mm overhang on the bottom of the door.

      190mm cill

      190mm

      This deeper cill has a 90mm overhang if the frame is fitted to the back edge of the external brick course. This cill is generally used for locations where the frame is set back further away from the outside brickwork, e.g. if you have rendered/timber clad walls.

      225mm cill

      225mm

      The deepest cill we offer would have a 125mm overhang if the frame was fitted to the back edge of the external brick course. This cill is generally used for locations where the frame is set back further away from the outside brickwork, e.g. if you have rendered/timber clad walls.

      Threshold Options

      This is the part of the frame that you step over to get in and out of the doors. We recommend the standard threshold which has a rebated frame, this provides the best weather protection for your doors as the upstand is designed to create a physical barrier against any water or wind trying to enter the property as it creates a useful edge to seal the opening doors to.

      The standard rebated threshold: which we recommend as it provides the best weather protection. Depending on if you are fitting the doors into a new build property or as a direct replacement it may be possible to fit the threshold in such a way that on open out doors the internal floor can be finished flush to the threshold so that there is no internal step.

      Standard
      Standard cill

      The low threshold: we do not recommend this threshold for external use, especially not in exposed locations as this option has no rebate for the opening doors to close on to and therefore there is no direct seal and instead the system relies on a rubber gasket and a brush pile. Whilst we have done everything to minimise the risk of air and water penetrating inside the property with this type of cill we cannot guarantee it. This option does have the advantage of only being 15mm high which means that there is only a very small step over and ramps are also available if required.

      Low
      Low cill

      Head Vent Options

      If you are fitting a bifold door into a new build property or extension, then to comply with Building Regulations provisions must be made within the frame to fit a head vent/trickle vent to allow for 5000mm2 of background ventilation. Most vents are controllable which means you can have them open or closed and as the name suggests, when open the trickle vents allow a small and regular flow of clean air into the property to create a healthier and better living environment, the nature of the airflow is hardly noticeable.

      So, in short if you are having doors for a new build property or extension then you should order your door with head vents.

      Headvent

      Delivery Options

      Our Nationwide delivery service provides fast and effective transportation of your new Bifold Door, all of our bifold doors will arrive ready assembled with the glass lose.

      Please be mindful of delivery access (7.5tonne lorries typically) and ensure there are capable people to unload and take delivery of your new Bifold door, Weights vary but typically require two people to take delivery of the product.

      All bifold ordered over 6300mm and or 7/8 panes will be delivered flat pack and do not come ready assembled.

      Frame Extension Options

      We can supply sections of Aluminium profiles (referred to as frame extensions) that clip onto the sides/top of the frame to make the profile wider. They are often used in properties which have deep plaster reveals to allow extra clearance for the frame which will prevent the frame from being buried into the plaster, typically unless the plaster is more than 30mm deep you should not require add-ons although your surveyor or installer should be able to advise you accordingly.

      Below is an image showing a section of frame with the frame extender on it.

      42mm

      Glazing Options

      Matrix

      Our aluminium lantern roof glazing options include 24mm standard double glazing, in the following styles: Azura+ Blue, Natura+ Planitherm, bronze, grey and clear.
      These glazing options have been designed to increase the heat retention performance of the roof build.

      Delivery Options

      Choose our delivery option, perfect for your project. Whether you’re looking to save money or save time, we’ll be able to offer you a service that perfectly suits what you need.
      Our lantern roofs are flat packed upon arrival, which is perfect for increasing the flexibility that you have on site. If you have any questions, please don’t hesitate to get in touch.

      How To Measure Bifold Doors

      Before ordering your bifold doors, you’ll need to precisely measure the aperture in which the door set is going to be installed.

      1. Measure the width and height of the opening in 3 separate places (as shown in the diagram below).
      2. Take the smallest dimension for the width (2195) and height (2095) and delete 10mm from each size, this will give you the correct sizes for ordering.
      3. The 10mm deduction will allow you to pack out the frame during installation in order to ensure that the doors are perfectly plumb in the opening.
      4. Doors must be viewed from the outside when ordering – this is important when specifying opening options.

      Bifold size

      How To Measure Lantern Roofs

      To order a lantern roof you need to provide us with two sizes; the width and the length.

      It is important to bear in mind that the lantern roof must sit on a timber upstand (we do not supply the timber upstand and recommend an upstand of 100mm wide x 150mm tall). You therefore need to include the width of this upstand in your measurements to us.

      • The width equals the actual opening size PLUS the width of the timber upstand (on both sides)
      • The length equals the actual opening size PLUS the width of the timber upstand (on both sides)

      The wrong measurements might lead to a Roof Lantern of the wrong size, so please make sure that your sizes are accurate before completing your purchase.

      In the example below:

      • The width of the opening is 1500mm
      • The length of the opening is 3000mm
      • We are using a timber upstand of 100mm wide x 150mm tall
      • So, the roof size we need to order is:
        • Width = 1500mm + 100mm +100mm = 1700mm
        • Length = 3000mm + 100mm +100mm = 3200mm
      Kerb measurement
      Lantern measurement

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      The high performance polyamide bridge that is installed into the profile of our aluminium bi-fold doors upholds impressive standards of insulation. This design works to increase the heat retention of your property, ensuring warm air stays inside for longer.

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      The high performance polyamide bridge that is installed into the profile of our aluminium bi-fold doors upholds impressive standards of insulation. This design works to increase the heat retention of your property, ensuring warm air stays inside for longer.