Friday, 26 October 2012

Passivhaus Trust Membership for DVS Ltd

Daylight and Ventilation Solutions Ltd (DVS) are very proud to announce becoming a member of the Passivhaus Trust.

The Passivhaus Trust member logo

As exclusive UK suppliers of the worlds first certified Passivhaus skylights (FEenergysave) and inclined aluminium roof glazing system (PR60energysave), Passivhaus Trust membership was an obvious choice.

Daniel Boughton, DVS' managing director explains: "In becoming members of the PH Trust we're not only supporting their activities, but also helping to raise awareness and to promote the Passivhaus standard in the UK".

The most energy efficient building standard demands the most energy efficient building products - and for rooflights DVS certainly delivers.

"The launch of our certified Passivhaus rooflights has generated loads of interest, we have been contacted by many Passivhaus architects keen to specify them on their projects", says Daniel, "...and feedback has been very postive indeed, the products welcomed by all, with many saying it is great to finally have a proper Passivhaus certified solution to work with".

DVS have been invited to present a seminar "Standards & performance realting to rooflights for Passivhaus projects" at the forthcoming UK Passivhaus Conference, which is being held in Nottingham on 7th and 8th of November, for full details and registration follow this link (opens a new window): UK Passivhaus Conference.

Thank you for reading this article, if you would like more information about our Passivhaus certified skylights or any of our other energy efficient rooflights please leave a comment below, email us or call 01284 749051.

Saturday, 1 September 2012

Barrel vault rooflight installation at Wahaca restaurant (Southbank, London)

Oxford Street based London Softroom Architects contacted us back in December 2011 to discuss a very unique project - they had been commissioned to design a new restaurant for the Mexican tapas chain Wahaca.

This new "pop-up" restaurant was being planned for installation on the outdoor terrace of the Queen Elizabeth Hall at the Southbank Centre (along side Waterloo Bridge) - a very exciting and vibrant area of the capital.

It was to be no ordinary construction, 8No. shipping containers stacked in pairs were to create the structure of the two storey building and a glazed link running the entire length of the building would flood the restaurant with natural daylight.

Stacks of shipping containers create the structure.

It was agreed that our continuous barrel-vault rooflight would provide the perfect solution for the glazed atrium and so we worked closely with Softroom Architects to ensure the detailing and product specification was correct from the beginning. It was decided that 5No. 1200x2000mm opening ventilation flaps should be incorporated into our rooflight, to provide natural ventilation.

Once du Boulay Contracts were appointed as principle building contractor we secured the order for the design, manufacture, supply and installation of the rooflight. The final rooflight dimension was for a roof opening size of: 1.7 metres wide x 24 metres long, complete with the 5No. equally spaced opening flaps.

Our completed rooflight installation at Wahaca Southbank

We worked very closely with du Boulay's contract manager, as this project presented its own unique set of challenges. The shipping containers were being converted and prepared off-site, which meant that they would be delivered and craned into position pretty much complete and the build program was therefore incredibly tight.

Due to the delivery schedule of the shipping containers (6No. delivered in phase one with the balance 2No. delivered some 3 weeks later), du Boulay asked us to conduct our rooflight installation in two phases. As soon as the first batch of containers had been craned into position, we attended site to install the first half of our rooflight, meaning the building was watertight and internal finishing could continue (a good job really, because we were experiencing a very rainy British summer at the time!!).
 
Watch our video of the last container being craned into position.

Once the last container had been lifted into position we returned to site to complete our rooflight installation. In just two days we had completed phase two of the installation, including mounting the 5No. opening flaps and 230v motors. du Boulay were then able to complete the internal fit out in a water-tight building envelope and get the project completed and handed over on-time.

5No. large 230v opening flaps provide natural ventilation.

When you're next on Southbank, why not stop by at Wahaca and enjoy a hearty burrito or a delicious taco underneath our rooflight - please let us know what you think.

Thank you for reading this article, if you would like more information about our rooflights or anything else - please leave a comment below, email us or call 01284 749051.

Wednesday, 29 August 2012

Growth into a new premises

We are delighted to report that due to continued and sustainable growth, Daylight and Ventilation Solutions Ltd (DVS) is expanding into a new larger premises.

We look forward to welcoming you to our new office.

DVS launched the Lamilux brand of rooflights into the U.K. just 18 months ago but thanks to having such a comprehensive range of quality flat roof skylights (including the worlds 1st PassivHaus certified flat roof skylight and sloped roof glazing system) and offering first class customer service, we have very quickly established ourselves as a leading supplier of premium rooflights in the market place.

From offering prompt competitive quotations and detailed product specification advice through to delivering and installing quality rooflights on time - we are building an enviable reputation which is providing us a great foundation for our continued growth.

Our new premises benefits from a dedicated conferencing suite and large meeting room - so we are looking forward to inviting existing and new clients alike in for meetings, product launches, seminars and demonstrations.

If you'd like to come in and see us, please feel free to email us or call 01284 749051 to arrange a convenient date and time - we look forward to welcoming you very soon.

Our new business address is:

Daylight & Ventilation Solutions Ltd
Unit 11 The Vision Centre
5 Eastern Way
Bury St. Edmunds
Suffolk
IP32 7AB

Click here for map.

Our phone number remains unchanged: 01284 749051, however our fax number changes to 01284 706669

Thank you for reading this article, if you would like more information about our rooflights or anything else - please leave a comment below, email us or call 01284 749051.

Friday, 24 August 2012

First sloped glazing system to achieve PassivHaus certification

Daylight and Ventilation Solutions (DVS) exclusively represent Lamilux in the U.K. and we are therefore delighted to report that we offer the worlds first PassivHaus certified sloped glazing system.
 
This article sets out to explain what this certification means and why the PR60 is the roof glazing of choice for PassivHaus projects, as the only certified sloped glazing component. 


Dr Benjamin Krick from the PassivHaus Institute Darmstadt (centre) recently presented Lamilux CEO Dr Heinrich Strunz (left) and Technical Manager Joachim Hessemer with a certificate for the first sloped glazing component compliant with the PassivHaus Standard.

Click here for a full PDF copy of our PassivHaus Certificate

PassivHaus represents one of the most stringent standards in energy efficiency in modern construction. It is regarded as the world’s chief energy efficiency standard for new buildings and building refurbishments. This is because passive houses dispense with separate heating systems and make use of existing energy in buildings to provide heating instead. In order to comply with this requirement, PassivHaus planners rely on high-grade, energy-efficient quality construction materials which retain the maximum possible amount of energy inside buildings and provide an extremely airtight building envelope, thanks to their certified insulation properties. Lamilux has just been provided with conclusive proof that its glass roof structure CI System Glass Architecture PR 60 features such characteristics. This glass and aluminium system has recently been certified by the PassivHaus Institute in Darmstadt, Germany, as the first sloped glazing component suitable for passive houses. The aesthetically pleasing daylight system with its customisable shape achieved top marks and was assigned to the Advanced Component phA category.

Lamilux CI System Glass Architecture PR 60 is the product of consistent further development of the energy-efficient qualities in a thoroughly tried-and-tested glass roof structure, Lamilux CI System Glass Architecture KWS 60. The daylight system manufacturer Lamilux has used this structure in a whole range of sizes in many national and international projects, such as shopping malls, administrative buildings and office complexes. 

The perfect solution for larger area and bespoke roof glazing.

Twice the efficiency thanks to optimised insulation system

In accordance with Passive House requirements, the technical conditions provided in the newly certified system consistently allow glazing to be used which comprises three panes with Argon gas filled cavities. Two of these glass panes feature a low-e coating. The “warm edge” with Super Spacer forms a spacer system. The U value, or heat transmittance coefficient, in the 52mm glazing specification (Ug) is 0.70 W/(m²K) when installed in an inclined position.

Lamilux has developed a new insulation system for posts and rails, consisting of a combined impermeable core which unites the insulation block and the insulation web in a single component. The material used in the system makes the supporting structure twice as energy efficient. The heavy load from the glazing elements is absorbed by the glazing support, aided by glazing fastening bolts, while posts and rails feature very low heat transmittance coefficients of 0.91 W/m²K.

Lamilux have developed a a new insulation system for posts and rails.

Outstanding heat insulation with a UCwi value of 0.82 W/(m²K)

The Passive House Institute in Darmstadt established a UCwi value of 0.82 W/(m²K) for the daylight system as a whole. A good heat transmittance coefficient is one of the main criteria for successful certification and must be under 1.00 W/(m²K) for sloped installation in roofs.

Assessors attach great importance to other aspects when it comes to assuring compliance with Passive House requirements with hygiene playing a significant role. In order to prevent condensation and mould growth, the 12.6°C isothermal line must consistently lie within structures at an outside temperature of -5°C, an indoor temperature of +20°C and a relative humidity of 50 per cent. Lamilux CI System Glass Architecture PR 60 complies with this requirement.

Insulation properties and hygiene requirements play a decisive role in PassivHaus certification.

Heat loss is another factor; this is calculated for the frame system and the ‘warm edge’, and expressed by the coefficient ψopak. The lower this value is, the higher the efficiency class. In the case of Lamilux CI System Glass Architecture PR 60, the coefficient is lower than the maximum value of 0.110 W/(mK) for Passive House classification in the phA – Advanced Component class. 

Glass roofing for energy and cost conscious architects and planners

“With its CI System Glass Architecture PR 60, Lamilux has managed to bring onto the market the first post and rail system in the Sloped Glazing category,” state assessors at the Darmstadt-based Passive House Institute. This provides energy and cost-conscious architects and planners with the first ever glass roof solution which is not only suitable for passive house constructions, but also complies with requirements for the top Passive House efficiency class phA. 

Click here for a PDF copy of our PR60 Brochure.

Thank you for reading this article, if you would like more information about our PassivHaus certified skylights or any of our other energy efficient rooflights please leave a comment below, email us or call 01284 749051.

Security comes as standard with our glass rooflights

As standard, our aluminium framed glass rooflights offer protection against forced entry – with tested resistance class.


Our rooflights offer burglar resistance - as standard.

Once they have gained access to the flat roof, burglars often try to enter the building by levering open skylights or breaking their glazing.

Comprehensive tests have shown that this method is significantly hampered by our aluminium framed glass rooflights: LINK TO BROCHURE

Our glass skylights belong to resistance class 2. The resistance classes are tested and regulated by European standard DIN V ENV 1627 (identical to BS EN 1627: pedestrian door sets, windows, curtain walling, grilles and shutters. Burglar resistance. Requirements and classification for burglary resistant windows and doors).

Don't make it easy for the burglar!!

Choose DVS rooflights with certified burglar resistance, as standard.

Saturday, 11 August 2012

Barrel vault rooflight installation at Great Marlow School new sports hall

When architects practice Peter Taylor Associates Limited initially contacted us, our technical rooflight expertise meant that we could offer sound specification advice for their new sports hall project at Great Marlow School in Buckinghamshire. Our continuous barrel vault rooflights were therefore specified for the flat roof to the new sports facility.

Thomas Vale Construction were appointed as the main building contractor for this project and our rooflights formed part of the roofing and cladding sub-contract, which was awarded to Kovara Projects Limited - a leading specialist roofing and cladding contractor.

We worked closely with Kovara right from the early stages, offering detailed information about upstand detailing, tolerances and so on. Once the final rooflight dimensions had been determined our technical department prepared and issued a full set of manufacture drawings for Kovara's approval.

The rooflight order was for the design, manufacture, delivery and installation of 2No. barrel vault rooflights, for an internal upstand dimension of: 1No. @ 1100x9100mm and 1No. @ 1100x33100mm.

Insulated galvanised steel upstand - ready for our rooflight installation

Kovara installed the galvanised steel upstands, which were insulated and weathered to the Kingspan TopDeck flat roofing membrane, ready for our specialist rooflight installers.

Once we had received drawing approval, our state of the art factory commenced rooflight manufacture and materials were delivered to site, ready for installation just 4 weeks later.

Barrel vault rooflights during installation.
Our thermally optimised base track, curved glazing support bars and gable end panels were installed and completed on day one - ready for the glazing panels to be installed.

Completed barrel vault rooflight installation.
By lunch time on day two our 2 man installation team had completed the rooflight installation, and everybody involved was delighted with the result.

A technical note regarding our Continuous Barrel Vault Rooflight system:
Our barrel vault rooflight is the only system with European Technical Approval. Approved with certificate number ETA-09/0347, our continuous rooflight has successfully proven its technical and energy-efficient qualities during these tests. You can read all about what this certification means and why architects, contractors and investors can confidently specify and install our rooflights: The first continuous barrel vault rooflight with European Technical Approval

Thank you for reading this article, if you would like more information about our rooflights, the EOTA certification or anything else - please leave a comment below, email us or call 01284 749051.

Wednesday, 18 July 2012

Introducing the worlds first PassivHaus certified flat roof skylight - FEenergysave

Daylight and Ventilation Solutions (DVS) exclusively represent Lamilux in the U.K. and we are therefore delighted to report that we offer the worlds first PassivHaus certified rooflight for flat roof installation.

This article sets out to explain what this certification means and why the FEenergysave is the rooflight of choice for PassivHaus projects, as the only certified component.

Most of the countries in the European Union are issuing national regulations as a means of implementing the EU directive on the energy performance of buildings. This directive demands a near-zero energy building standard for all new buildings by 2020, in order to achieve a practically "climate neutral" building stock in European countries by 2050, with an 80% reduction in primary energy requirements. The energy-efficiency qualities of structural components have therefore become an all-important factor in contemporary construction – and PassivHaus design as the highest standard of energy efficiency is now a hot topic. 

Once again, as a manufacturer of daylight, SHEV and control systems, Lamilux is able to help architects and planners by supplying innovative, PassivHaus-certified products: the Lamilux CI System Glass Element FEenergysave has been certified by the renowned PassivHaus Institute in Darmstadt, Germany, as the world’s first skylight suitable for passive buildings. This highly energy-efficient daylight element for flat roofs has achieved the top efficiency class, the Advanced Component phA category.

PassivHaus Certification

Click here for a full PDF copy of our PassivHaus Certificate

The FEenergysave is the product of further development of the energy-efficient qualities of our time-tested daylight element (Lamilux CI System Glass Element FE). During the course of numerous projects, daylight systems manufacturer Lamilux has integrated both small and large quantities of these elements into the flat roofs of industrial premises, office blocks, school buildings, trade fair and sports halls, prestigious buildings and private houses.

FEenergysave Rooflight Brochure.

Click here for a full PDF copy of our FEenergysave Brochure
 
Twice the efficiency thanks to optimised insulation system

In accordance with the requirements for passive houses, the newly certified skylight unit is always fitted with glazing that comprises three panes, with argon gas between the panes. Two of these glass panes feature a low e coating. The "warm edge" with Super Spacer forms a spacer system. The U value, or heat transmittance coefficient, in the 54mm thick glazing package (Ug) is 0.84 W/(m²K) when installed horizontally.

Lamilux has developed a new insulation system for the frame, consisting of a combined insulation core that unites the insulation block and the insulation web in a single component. The material used in the system makes the daylight element twice as efficient: the glazing support absorbs the heavy load from the glazing elements, while the frame features an extremely low heat transmittance coefficient (Uf = 0.61 W/m²K).

Outstanding heat insulation with a USL value of 0.84 W/(m²K)

A USL value of 0.84 W/(m²K) was determined by the PassivHaus Institute in Darmstadt for the daylight element as a unit, on the basis of EN ISO 10077-1 and 10077-2. A good heat transmittance coefficient is one of the main criteria for successful certification and must be under 1.10 W/(m²K) for horizontal installation in roofs.

Assessors also attach great importance to other aspects, however, when it comes to assuring compliance with PassivHaus requirements. Hygiene plays a significant role: in order to prevent condensation and mould growth, the 12.6°C isothermal line must consistently lie within structures at an outside temperature of -5°C, an indoor temperature of +20°C and a relative air humidity of 50 per cent. The FEenergysave complies with this requirement.

Cross section and Isothermal diagram - click to enlarge.
 
Heat losses are another factor: they are calculated for the frame system and the “warm edge” and expressed by the coefficient ψopaque. The lower this value is, the higher the efficiency class. In the case of the FEenergysave, the coefficient is lower than the maximum value of 0.110 W/(mK) for PassivHaus classification in the phA – Advanced Component class.

Skylight for energy and cost conscious arhitects and planners

"A PassivHaus requires highly energy-efficient components to maintain its high standards" state assessors at the Darmstadt-based PassivHaus Institue. The independant testing centre carries out tests using standardised criteria to give architects and planners a clear idea of energy efficiency in construction components. "We were able to certify that the FEenergysave in the highest efficiency class. This skylight thus offers superior energy-efficient quality".

Thank you for reading this article, if you would like more information about our PassivHaus certified skylights or any of our other energy efficient rooflights please leave a comment below, email us or call 01284 749051.

Saturday, 7 July 2012

Rooflight upstand ventilation

All of our flat roof rooflights can be supplied either fixed or opening. There are many reasons why you may wish to opt for an opening skylight including; to provide natural ventilation, to gain access to your flat roof and so on. There are also occasions where you may want to install a fixed rooflight but ventilation is of vital importance - examples include in the roof of a bathroom or kitchen.

Kitchens and bathrooms generate a lot of humid air and so you may also want to consider mechanical extraction - another area for which we offer a solution.

We offer our fully insulated upstand with an optional "small space ventilator" - incorporated within our upstand:

Internal view of our integrated powered extraction - click to enlarge.

We can offer these ventilation units with our 300mm, 400mm and 500mm high insulated upstands.

Each of these powered extraction ventilators provide 170m³/hour of air movement and it is possible incorporate between 1 to 4 per upstand - so up to 680m³/hour (per rooflight/upstand)!!

Everything is prepared within our factory, and so you receive a completely finished solution that just needs connecting by your electrician.

The external weathering of the ventilation unit is also taken care of, as we supply an external cowl:


External view of our integrated powered extraction - click to enlarge.

Thank you for reading this article, if you would like more information about our rooflights - please leave a comment below, email us or call 01284 749051.

Wednesday, 9 May 2012

The first continuous barrel vault rooflight with European Technical Approval (ETA-09/0347)

Daylight and Ventilation Solutions (DVS) exclusively represent Lamilux in the U.K. and we are therefore delighted to report that we offer the first and only continuous rooflight which has been certified and approved for European-wide installation.

This article sets out to explain what this certification means and why it sets our continuous rooflight apart from other products, meaning you can confidently specify and install our rooflights.


Rooflights are a classic solution for industrial units and facilities. They are designed to guide daylight into building interiors and provide natural ventilation and reliable smoke and heat extraction (SHEV) with their integrated flap systems. However, as with all structural elements used in contemporary buildings, one factor is a top priority in skylights: energy efficiency. Lamilux, a manufacturer of premium quality daylight systems, SHEV systems and control technologies, has now brought onto the market the first daylight structure with tested and certified heat insulation values: the CI System Continuous Rooflight B.

Certification means that all thermal bridges have been eliminated in the CI System Continuous Rooflight B. Depending on the configuration installed, this continuous rooflight is able to achieve a Uw value as low as 1.7 W/(m²K). The system also features a European Technical Approval, for which LAMILUX demonstrated that the component has excellent heat insulation values.

With CI System Continuous Rooflight B, LAMILUX is the first European manufacturer to develop a continuous rooflight which meets European technical standards and is thus approved for use throughout the EU. Issued by the European Organisation for Technical Approvals (EOTA), the approval constitutes a recognised certificate verifying suitability for use in EU member states. It is awarded after products pass comprehensive tests on inherent characteristics such as stability, heat insulation, sturdiness and durability. Approved with certificate number ETA-09/0347, LAMILUX CI System Continuous Rooflight B has successfully proven its technical and energy-efficient qualities during these tests.

A full PDF copy of the EOTA certificate can be view here: ETA-09/0347

Free of thermal bridges thanks to thermally decoupled base profile

LAMILUX was able to meet stringent energy efficiency requirements while developing its CI System Continuous Rooflight B by focusing on heat insulation characteristics. It has produced a thermally decoupled base profile for its continuous rooflight system. “Until now, the base profile in continuous rooflights was made of metal. However, such a material also created a significant thermal bridge,” explains Enrico Penzel, an engineer who was closely involved in developing the new continuous rooflight. If you replace a metal profile with a thermally decoupled, purely composite one, you may be able to eliminate the thermal bridge, but then you might have problems with the structure. “The challenge was now to combine the absence of thermal bridges with a sturdy structure while improving both these qualities.”

Our patented Isothermal Load Converter - click to enlarge image.

A continuous rooflight for optimum energy efficiency

The development process resulted in a metal tension bracket held in place by a composite base profile. Integrated into the base profile is the Isothermal Load Converter (ITL), which channels the load on the continuous rooflight into the supporting structure while ensuring optimum isothermal characteristics, thus guaranteeing maximum heat insulation. This structural element also greatly reduces the risk of condensation forming on the structure's surfaces, unlike conventional, non-thermally separated structures. The ITL enables the rooflight’s base profile system to achieve a Uf value as low as 1.3 W/(m²K). According to the approval, thermal insulation values as low as 1.6 W/(m²K) are possible for the rooflight as a whole. CI System Continuous Rooflight B is thus synonymous with optimum energy efficiency. 

Optimised isothermal characteristics for the
entire rooflight structure - click images to enlarge.

Maximum values for structural stability and smoke extraction

Besides heat insulation values, LAMILUX has also optimised numerous other relevant product parameters in its continuous rooflight system. For example, design variations are available to withstand snow loads up to 3.9 KN/m² and wind suction loads up to 3.3 KN/m². LAMILUX also attaches great importance to the stability of sheet steel upstands, the steel grade of which is certified in compliance with the DASt 016 guideline recognised across Europe. This ensures that the structure is strong enough to withstand mechanical stress.

Optimum resistance to storms is also assured in flap systems thanks to the patented Dynamic Torque Control (DTC) technology. With the help of a spring system, polycarbonate glazing is mounted in flap frames in such a way that tensioning is optimised. When subjected to high stress, the polycarbonate sheets remain perfectly secured, as the impact from wind loads is optimally absorbed and dampened. 

Our patented Dynamic Torque Control - click to enlarge.
Secured by springs when in the open position, these flaps also ensure dependable smoke extraction. Thanks to large-surface flaps of up to 300 x 200 cm, remarkable Ae values can be achieved. For instance, a double flap attains a peak value of 4.15 m² of aerodynamically effective opening surface. This component can also be used as a ventilation flap.

Double and single opening flaps can be used for
natural and smoke ventilation (EN 12101-2 certified).

Intelligent energy management

“With the new CI System Continuous Rooflight B, we have developed a daylight system for intelligent, sustainable building management which is breaking ground in terms of energy efficiency and structure,” affirms engineer Joachim Hessemer, Technical Manager at LAMILUX. LAMILUX provides a quality certificate verifying these characteristics, which it hands over to each customer as their system is delivered. “This document enables us to provide our customers with proof of the excellent quality in the supplied product each time that we deliver. The certificate confirms that the daylight system is manufactured and installed in compliance with the EOTA approval and the technical standards specified in the approval.”

To ensure compliance with these standards, LAMILUX pays extremely close attention to strength when selecting materials. High-grade aluminium profiles, stainless steel hinges and a hard PVC frame ensure stability while EPDM seals provide optimum air-tightness. The type of glazing is selected according to customers’ needs, with customers choosing between soundproof glazing, or highly chemical-resistant glazing made of unsaturated polyester resin GRP, for example.

Thank you for reading this article, if you would like more information about our rooflights, the EOTA certification or anything else - please leave a comment below, email us or call 01284 749051.

Wednesday, 25 April 2012

Roof access rooflight with quadruple glazing (Islington)

We pride ourselves with being able to offer the perfect glazing specification to achieve the desired levels of daylight, solar protection, heat & noise insulation in our thermally optimised rooflights.

Our F100 rooflight has such a comprehensive range of glazing options that we can always offer a solution to achieve even the most demanding requirements. For more details on our rooflight dome glazing options, please refer to our article: rooflight dome glazing options.

The Apollo Group are one of the UK's largest socially responsible contractors and they came to us for advice on a number of rooflight domes required for a new build Homes for Islington (HFI) social housing project, for which Apollo are main contractor. Apollo wanted to install the most thermally efficient flat roof rooflight domes available.

Our quadruple layer rooflight dome offers fantastic thermal efficiency

We offer our rooflights with fully substantiated total product U-values which are calculated according to the internationally recognised standard: EN ISO 10077-2:2009 - Apollo could therefore be 100% satisfied that the U-values we claim are completely verified. For more details on rooflight U-values, please refer to our article: Uw - the value which really counts.

We have supplied a number of quadruple layer rooflights for this HFI project, one was a roof access rooflight for a roof opening size of 900x1200mm. Supplied with quadruple layer domed glazing and our 400mm high insulated GRP upstand (other heights available: 150mm, 300mm and 500mm) this F100 rooflight dome has a total product U-value of just 0.94W/m²K and here is the data-sheet to prove it: U-value data sheet.

Equipped for roof access - with colour coded gas struts, an internal handle and lock.

Our F100 rooflight dome award winning (JEC Paris 2009 Innovation Award) patented framework is fabricated from a rigid PVC profile which is completely free of cold bridges. The framework also benefits from 2No. co-extruded seals for optimised thermal & noise insulation and reliable protection against driving rain.

Patented award winning framework.

Apollo's contracts manager commented on the ease of the rooflight installation: "...because the rooflight is delivered to site fully factory assembled and pre-mounted to its upstand, you literally just position the rooflight over the roof opening, fix it though the upstands foot flange into the roof deck - and job done!". Also, because our upstands are fabricated from fully pigmented & insulated GRP they can withstand the heat of roofing torches.

Thank you for reading this article, if you would like more information about our rooflights, the options for roof access or information about rooflight U-values - please leave a comment below, email us or call 01284 749051.

Wednesday, 11 April 2012

Pyramid glass rooflight case study (Beckenham)

We are delighted to report upon the installation of a couple of our aluminium framed pyramid glass rooflights to a domestic flat roof extension in Beckenham, Kent.


DVS' 30° pyramid rooflights on EPDM flat roof - click to enlarge

The building contractor, WES Construction Limited (WES) is a specialist installer of RubberBond Fleeceback - a high performance EPDM flat roofing membrane, and we were contacted to discuss the rooflight requirements. WES' clients liked the idea of installing pyramid shaped rooflights and so we were able to offer both 30° and 45° versions. They prefered the shallower inclination of our 30° pyramid - as it gave them the sense of additional height without compromising the view from the upstairs windows which overlook their new extension.

The 30° inclination does not obstruct the view from 1st floor windows

We agreed the final rooflight requirements with WES as being: 1No. 30° pyramid for a roof opening size of 1000x1000mm and 1No. 30° pyramid for a roof opening size of 1000x1500mm. WES' clients were specific about the finishing of the rooflights aluminium frames - not a problem when choosing a DVS aluminium rooflight. We can supply our rooflight frames: 

  • Mill-finish (natural aluminium),
  • Powder coated to a single colour or, 
  • Powder coated dual colour.

...and in any RAL colour. This is particularly useful for customers wanting to match the colour of their rooflight frames with the frames of doors and/or windows. We were asked to supply the rooflights dual colour powder coated with jet black RAL 9005 externally (to match with the roofing membrane) and pure white RAL 9010 internally.

Beautifully clean lines - just 38mm internal sight lines.

Both the building contractor and their clients are absolutely delighted with the installed rooflights. Following installation we asked WES for their opinion on our rooflights and here is what they had to say:

  • "The fixing detailing is absolutely brilliant".
  • "You couldn't beat the quality of these rooflights - some competing products on the market look DIY in comparison!".
  • "Our clients are over the moon with the rooflights".
  • "Well worth the money".
  • "I would have no hesitation in installing these rooflights on our future flat roofing projects".

If you have an old flat roof in need of re-roofing or if you are planning an extension in the South East London and Kent areas - why not give WES Construction a call on 020 8306 8699?

For more information about our range of rooflights please refer to our website, email us or give us a call on 01284 749051 - and we'd be delighted to offer you all the advise you need.

Tuesday, 10 April 2012

Rooflight dome glazing options.

At DVS we are absolutely passionate about daylight and we work very closely with architects to ensure the desired levels of daylight, solar protection, heat & noise insulation are achieved when specifying our rooflights.

Our F100 rooflights have such a comprehensive range of glazing options that we can always offer a solution to achieve even the most demanding specifications.

We offer our F100 rooflights with the following main glazing options:

  • Double layer domed glazing.
  • Triple layer domed glazing. 
  • Quadruple layer domed glazing.
  • Double layer domed glazing with 16mm 6-ply multi-wall polycarbonate.
  • Double layer insulation glazing (glass).

Each of these glazing options has its own unique attributes, and these are detailed below:

Double layer domed glazing:

Heat transmittance (glazing only) Ug: c. 2.6 W/m²K

Sound index Rw, P: c. 24dB

Light transmittance: c. 73%




Triple layer domed glazing:

Heat transmittance (glazing only) Ug: 1.9 W/m²K

Sound index Rw, P: 24dB

Light transmittance: 64%




Quadruple layer glazing:

Heat transmittance (glazing only) Ug: 1.6 W/m²K

Sound index Rw, P: 24dB

Light transmittance: 64%




Double layer domed glazing with 16mm 6-ply polycarbonate:

Heat transmittance (glazing only) Ug: 1.3 W/m²K

Sound index Rw, P: 24dB

Light transmittance: 40%




Double layer insulation glazing:

Heat transmittance (glazing only) Ug: 1.1 W/m²K

Sound index Rw, P: 38dB

Light transmittance: 78%




All of our domed glazing options can be supplied either clear or opal. We usually recommend opal glazing, as it provides a more evenly distributed natural daylight which is dazzle free. Rooflight domes have "self-cleaning" properties, mainly due to the excellent water run-off from the domed glazing, but opal glazing makes for an even lower maintenance rooflight as any (inevitable) dirt/debris is much less noticeable, particularly useful if the rooflight is being installed onto a roof with difficult or no access.

The quoted heat transmittance values above, relate to the glazing only and therefore do not reflect the overall thermal performance of the entire rooflight. We also supply fully verified total rooflight U-values which are calculated according to the internationally recognised standard EN ISO 10077-2:2009 and this takes into account the glazing, frame profile, the upstand and area to give the complete U-value of the product. For a  detailed explanation on rooflight U-values, please also read our news article: Uw - the value which really counts. Our triple layer F100 rooflight dome supplied with our 300mm high insulated upstand for a roof opening size of 1000x1000mm achieves a complete rooflight U-value of just: 1.1W/m²K refer to data sheet: F100 rooflight dome total U-value data-sheet.

Thanks for reading our article, for more information about our range of rooflights please refer to our website, email us or give us a call on 01284 749051.