Stage 2
Flat Roof Systems
21 Slides
- Flat Roof System
- Combi Flat Roof System
- Flat Roof Apex
- Summary
Flat Roof Systems
Flat Roof Systems
Flat Roof System (FRS)
Keylite's Flat Roof System has been specifically designed to provide all the benefits of natural ventilation and daylight into a room with a flat or almost flat roof.
The system includes:
- An Insulated Timber up-stand
- FRS Flashings to integrate the window onto the timber up-stand
Your choice of Keylite roof window is to be priced and supplied separately. Roof windows are not included as part of the system.
Structural Opening (FRS)
The structural opening for all flat roof systems will always follow the same rule:
Height of Structural Opening
Window Height plus 220mm
e.g. 980mm + 220mm = 1200mm Height
Width of Structural Opening
Window Width minus 20mm
e.g. 780mm - 20mm = 760mm Width
Total Structural Opening
Width Opening x Height Opening
e.g. 760mm x 1200mm
Structural Opening (FRS)
Flat Roof System (FRS)
The finished height of the top of the roof window where the handle rests will depend upon the length of the window.
The front edge of the upstand is also required to protrude 200mm above finished roof level, this will further increase the distance between the opening handle and the internal flooring. Typically, FRS installations will leave the window inaccessible.
Although it is rare for the UK and Ireland to experience heavy snow fall, building regulations require our systems to be situated at this height, ensuring the up-stand is 200mm at the front.
Flat Roof System (FRS)
Installation
Only to be installed on a roof between 0-15°
Builders can form their own up-stand, providing they follow the Keylite guidelines in order to ensure that the roof flashing components will be compatible.
Combi Flat Roof Systems
Combi Flat Roof System (CFRS)
The Keylite Combi Flat Roof System provides all the benefits of the standard Flat Roof System, however with up to three times the amount of natural ventilation and daylight.
The system includes:
- An Insulated Timber up-stand
- FRS Flashings to integrate the window onto the timber up-stand
Your choice of Keylite roof window is to be priced and supplied separately. Roof windows are not included as part of the system.
Structural Opening (CFRS) - 18mm
The structural opening for all flat roof systems will always follow the same rule:
Height of Structural Opening
Window Height plus 220mm
e.g. 980mm + 220mm = 1200mm Height
Width of Structural Opening
Window Width plus Gap Size minus 20mm
e.g. 780mm + 18mm + 780mm - 20mm = 1558mm Width
Total Structural Opening
Width Opening x Height Opening
e.g. 1558mm x 1200mm
Structural Opening (CFRS)
Combi Flat Roof System (CFRS)
Installation
Only to be installed on a roof between 0-15°
Combi Flat Roof Systems can be installed with either 18mm or 100mm spacing between the frames. The standard system supplied has an 18mm gap size.
Keylite will provide decorative capping for all Combi Systems installed with an 18mm gap between the windows.
The number roof windows which can be installed is subject to the width of the roof windows chosen by the customer.
For additional information please contact Keylite Technical Department.
Flat Roof Apex
Flat Roof Apex (FRX)
The Keylite Flat Roof Apex System creates a sophisticated, atrium style roof window, capable of adding function and style to living spaces under flat roofs.
The system includes:
- An Insulated Timber up-stand
- Corresponding Flashings to integrate the windows onto the timber up-stand
Keylite roof windows are not included and must be priced and supplied separately.
Structural Opening (FRX)
The structural opening of Keylite’s Flat Roof Apex system must consider the angle at which the roof windows will be situated. This will be effected with varying window lengths.
There is no versatile rule for an Apex System installation. Contact Keylite’s technical department for calculated structural opening sizes.
Flat Roof Apex (FRX)
Installation
Only to be installed on a roof between 0-15°
Flat Roof Apex are always installed with either 18mm spacing between each roof window. Keylite will provide internal decorative capping for all Apex Systems.
The number roof windows which can be installed is subject to the width of the roof windows chosen by the customer.
Summary
Summary
All systems to be installed on a roof pitch between 0-15º, with the exception of a Flat Roof Apex, only to be installed between 0-5º.
All Flat Roof Systems include insulated timber upstands.
For the installation of systems over 2.2 metres, Keylite
recommends the roof windows fitted within Flat Roof Systems should include an electrically operating roof windows and Hi-Therm glazing units.
Keylite roof windows are to be priced and supplied separately for all systems.
Keylite Flat Roof Systems are supplied with 10 Years Guarantee.
Quiz
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