The roof system can cater from a pitch of 5° through to 45°, and a greater pitch can be obtained with a bespoke wall bracket. By incorporating heavy duty glazing bars up to a maximum of 4,800mm maximum projection can be accommodated with double-glazed toughened glass units. Larger projections can be achieved, contact our technical department for details.
Structural ring beam
A structural ring beam can create clear, unsupported span width openings of up to 6,000mm. So you can accommodate bifolding door or sliding doors around the whole perimeter if required when combined with corner posts, with the weight of the roof above fully supported.
With the addition of a roof vent(s), which can either be manually operated or thermostatically controlled with a rain sensor, you can be in complete control of the climate inside. The winding gear can be disengaged to enable access for cleaning etc.
The thermally broken aluminium roof system utilises both EPDM glazing gaskets and dual hardness gaskets for high performance, tested to CP3 Chapter V Part 2 for wind loadings (up to 100mph).
The roof system has been tested to BS 6399-3:1988 and is able to withstand the dead load of several inches of snow, or take the load of maintenance boards to carry out work above the roof.
The standard finishes are polyester powder coated white RAL 9016 or anthracite grey RAL 7016. Other RAL colours (over 200 colours) are available.
IDSystems roof systems have been specially designed to complement our bifolding doors and sliding door systems.
The system can accommodate triple glazing. Our standard 28mm unit comprises of 4mm clear toughened glass to the inner pane x 16mm argon gas cavity x 4mm neutral antisun toughened glass, providing an enhanced thermal efficiency, with a centre pane U-Value of 1.0W/m2K to comply with Building Regulations for safety and thermal efficiency.
All sealed units are BS kite marked, manufactured to BS EN 12600 and BS 5713:1979 standards.
All roof systems are pre-assembled in the factory to ensure everything runs smoothly and efficiently, at the time of installation. It should be noted that IDSystems does not undertake any site preparation, electrical or building works. Lead work and guttering can be quoted as an optional extra.
U-Values and heat losses
A U-Value is a calculation of the amount of heat lost through a building material. The calculation of U-Values can be quite complex as it is measured as the amount of heat loss through a 1m2 of material for every degree difference in temperature either side of the material. It is indicated in units of watts per square metre per degree Kelvin or W/m2K. The simplest way to approach U-Values is the lower the U-Value the more thermally efficient a product is.
A U-Value of a door or window is calculated by working out by determining the U-Value of the frame and the area of the glass and is then quoted as an overall U-Value. Beware that some manufacturers may just be providing the U-Value of the glass alone which gives a false overall value. All of our systems have been thermally simulated in accordance with CE standards to BS EN ISO 10077.
Building Regulations approval will be required on all extensions and new builds to which we are able to provide CE data showing compliance. Any replacement works we are able to cover being a member of FENSA and a certificate would be provided on completion of our installation.
Single, double or triple glazing
Single glazing can be used for internal systems that do not have to meet Document L regulations regarding thermal efficiency. Single glazing is available in a variety of thicknesses, types and colours. The most popular options on our internal door systems are clear or satin deco which lets through light but offers privacy.
Double glazing is a minimum requirement for external doors and windows. Our standard double glazed units consist of a soft-coat Low-E (low emissivity) pane and an argon gas filled cavity which provides a centre pane U-Value of 1.2W/m2K. Over the standard we can provide super insulated double glazed units providing a centre pane U-Value of 1.0W/m2K whilst providing solar control.
Triple glazing is becoming increasingly popular, especially in total new builds, as it provides the lowest U-Values possible and can be up to 40% more efficient than double glazing. Combining two panes of Low-E glass and two gas filled cavities glazing U-Values as low as 0.5W/m2K are possible with the added benefit of great sound reduction.
For more information on our huge range of glazing options or for help in specifying the correct glass for your project contact our technical sales department on 01603 408804.
Solar control and the benefits of solar gain
With the standard glass specification retaining as much heat as possible you may wish to consider reducing the heat transfer from outside which is known as solar gain. Solar gain can make glass roofs, conservatories or south facing elevations quite uncomfortable in the height of summer months.
A solar control glass is a glass with a either a special coating or a body tint to reduce the amount of heat entering a building either by reflecting or absorbing heat. Using a solar control glass can reduce the need for air conditioning and blinds. Whilst the solar control glasses are great at reducing the heat they will also reduce light transmittance.
Building control often recognise the benefits of solar gain in modern buildings as large areas of glass will work as a source of free energy during cooler months and increased solar gains are recommended. The use of low-iron glass can increase the heat and light transmittance to provide further solar gains during the autumn and winter months. Many modern designs incorporate overhangs to cast shadows over glazing during the summer combatting the solar gains. Thus allowing solar gains as the sun gets lower in the sky later in the year reducing the need for heating.
When required we fit toughened glass to comply with Building Regulations Document N as an alternate method of compliance we are able to fit laminated glass. Both options have their pros and cons.
Toughened glass has been heat tempered to increasing its strength over ordinary annealed glass by up to five times. Other than the strength the advantage of toughened glass is that should it break it would shatter into non-sharp pieces. It is also available with the widest variety of coatings and can be supplied in larger sheets than equivalent thickness laminated glass.
When the glass is toughened it can suffer from some visual distortion making, meaning the face of the glass is not perfectly flat distorting some reflections.
Laminated glass is manufactured by bonding two panes of annealed glass with a clear plastic interlayer. The benefit of laminated glass is that if it’s broken the glass will crack rather than shattering, improving security. In addition, laminated glass reduces bleaching of carpets, curtains and furniture by filtering ultraviolet rays that would usually penetrate the glass.
The drawback of laminated glass is that extreme heat or cold can cause invisible defects in the glass to form a crack due to the two panes expanding and contracting independently. As the laminated glass is not toughened is does not suffer from the visual distortion that can occur to toughened glass during the toughening process.