Insulated glass roofs

Unlimited Versatility

The insulated retractable roof is unique and can be used just about anywhere. For example, in restaurants and residential buildings or over pedestrian ways, swimming pools, atriums, winter gardens, balconies and roof terraces.

Manufactured in Scandinavia and patented in most countries.

Green technology – Energy savings

If you have chosen to install a glass roof for environmental or other reasons, Bentech retractable glass roofs offer the following energy-saving solutions and advantages:

A. Hot climates

Outdoor air temperatures from 32 to 45 °C/90 to 113 °F:

A well-insulated closed roof in combination with cooled indoor air during the daytime.
Open roof at night.
Reduced use of energy.

Outdoor air temperatures from 15 to 32 °C/59 to 90 °F:

The roof is opened, to let the outdoor air in.
The outdoor temperature the same as the indoor temperature during the daytime.
The roof is closed, as required, at night.
No use of energy.

Outdoor air temperatures from 5 to 15 °C/41 to 59 °F:

The roof is kept closed. Solar heat during the daytime heats the indoor air.
If the indoor air temperature exceeds the comfort level, the roof can be opened temporarily.
Very limited or no use of energy.

B. Cold climates:

Outdoor air temperatures from ‒ 30 to + 10 °C/‒ 22 to + 50 °F:

The roof offers good heat insulation.
Profiles of composite materials are not cold and provide warm surfaces, like wood
Heat from solar radiation provides increased comfort – less need raise the indoor temperature to compensate for low outdoor temperatures.
During the daytime, the roof functions as a passive solar collector, heating the indoor air.
Lower level of energy use compared to traditional glass roofs.

Outdoor air temperatures from + 11 to + 25 °C/52 to 77 °F:

If the indoor air temperature exceeds the comfort level, the roof can be opened temporarily.
The roof is otherwise kept closed and functions as a passive solar collector, heating the indoor air.
No use of energy.

Outdoor air temperatures from + 26 to + 32 °C/79 to 90 °F:

The roof can be kept open, letting the outdoor air enter the building. This will often provide a suitable indoor air temperature at night and during parts of the day.
If the indoor temperature becomes too high, the roof can be closed and the comfort cooling system switched on.
Significantly lower use of energy.

Bentech retractable glass roof – a cold winter night. The darker color the colder and better insulated

A few facts

Watertightness

Air cushions guarantee that the system offers a perfect seal, no matter what the slope of the roof. Laboratory tests have verified practical experience – that perfect watertightness is achieved even at slopes as low as 2-3 degrees. Movements that normally occur in roofs, for example due to wind and snow, are ingeniously compensated for without compromising tightness.

Insulated or Un-insulated

The roof system is available insulated or un-insulated. The insulated version is based on composite profiles and double glass units. The un-insulated system uses aluminium profiles and 6 mm toughened glass or 16 mm double wall polycarbonate panels.

Opening

The un-insulated glass roof can be opened manually or by motor. Selected manual opening this can be done using a rod. With a rod, each glass panel openes individually and the temperature under the glass roof is regulated according to your own needs and desires. With the electrical motor, the entire glass roof opens in two directions: First, from the eaves up against roof top – where the motor is placed under the roof, partly from the rooftop down toward the eaves – where the engine is placed on top of the glass ceiling.

Manual or motorized operation

The roof can be manoeuvred manually or by motor.

Remote control units and rain sensors are available as extras.

Self supporting

The roof is self-supporting and the insulated version permits span widths of up to 6.7 metres. The un-insulated version can span 4.2 m without additional steel supports. The roof consists of 4 elements in each section, of which 3 are retractable.

Simple installation

Both types of roof elements are simple to install. They are prefabricated in the same factory as the beams and profiles. This facilitates speedy erection at the building site and provides a much faster solution than conventional glass roofing.

Patents

The roof design is patented in a large number of countries.
Bentech sells patent licenses, semi-finished products and fully finished products.

Motor

The drive unit comprises a single phase, 220-volt tubular motor. One motor serves two roof segments and its synchronous drive belt is positioned directly under the beam that separates the two roof segments from each other.

The motors can be operated via a remote control or a fixed switch. If the solution requires more than one tube motor, a remote control must be used. Alternatively, each motor must be operated by its own fixed switch. If required, rain sensors can be attached later.

Insulated roofs can be factory-prepared for subsequent motor installation. This means that motors do not necessarily have to be fitted when the roof is being installed. They can be fitted when it suits the user.

Inform us of delivery dates and number of motors when ordering.

Test results

Norway ‘s Building Research Institute in Trondheim has carried out extensive tests of Bentech´s insulated retractable roof system.
The tests confirm the excellent results noted by our customers in practical experience – that our roofs are both watertight and airtight.

Watertightness

The roof is just as tight when it is inclined at 5 degrees as it is at 35 degrees. It has even been recommended for use in harsh environments, such those experienced along the Norwegian Atlantic coast.

Airtightness

Airtightness for windows is defined in the class 4 regulations of the NS-EN 12207 standard. Bentech´s insulated retractable roof meets these requirements.

Tightness guarantee

Bentech is the only manufacturer in the world which guarantees that their retractable glass roof is completely waterproof down to an inclination of as low as 2 degrees!

Technical Specifications

1. Maximum span width

2. Maximum section width at a roof andle of 30 degrees or lower

3. Type of glass panels

4. Kulörer på balkar och bärande element

5. Lowest roof angle

6. Heat insulation

7. Tightness

8. Weight

9. Dimensions