Q. Why would I choose a Keylite Roof Window instead of a traditional solid roofed dormer window?
Q. Do Keylite Roof Windows come with a guarantee?
All Keylite Roof Windows are manufactured using the highest quality materials and workmanship, guaranteeing many years of trouble-free enjoyment. All Keylite Roof Windows have a 10 year guarantee – you can register your roof window by visiting and filling in the online Guarantee Form.
Q. What size of Roof Window do I need for my room?
We recommend that the daylight area should be at least 10% of the floor area in order to achieve adequate natural daylighting. However, the overall effect can be improved dramatically by increasing the ratio to around 20%.
Q. My Centre Pivot Roof Window will not remain in the open position. How can this be resolved?
If you have a centre pivot window which is not staying in the open position this may be due to the pitch of your roof. The springs can be replaced with heavier duty springs that are now as standard within all Keylite Roof Windows.
Q. Are my Roof Windows secure from the outside?
The opening lights can be fitted with a key-operated locking device, where the windows are required to satisfy the security requirements of NHBC Standards.
It is the responsibility of the building designer to specify where these requirements need to be satisfied (Security against intrusion – BBA Extract).
Q. Why is there mould in the corners of my window?
This will help prevent condensation gathering on the glass (see window fitting instructions).
Q. How do I clean a Top Hung Roof Window?
Q. How much space in the roof do I need to leave for a standard Roof Window?
Q. Why is my roof leaking?
• C-Channels fitted the wrong way round
• The hood and top apron are not joined correctly (slate extension piece not fitted)
• The frame side flashing is not fitted correctly under the C-Channels
• The rubber end caps have been removed
• The flashings are not overlapped in the correct order
• The window has been fitted in a roof with a pitch less than 15°.
Q. How do electric blinds work?
Q. Can I use my own fabric to make a Roof Window blind?
Q. Can any blind be electrically operated?
Q. How do I fit my Roof Window Blinds?
Q. What is the minimum roof pitch required for installation of a Keylite Roof Window?
Q. Can I get a white finish on any roof window?
Q. Do the fire escape Roof Windows have to be a certain height?
Q. How do I weatherproof the flashings on the roof?
Flashings are supplied in a range of standard colours or can be colour-matched to specific roof coverings, including composite panel and standing seam systems.
All flashings are manufactured from fire-retardant ABS giving an AA fire rating to BS476, meaning that they can therefore be used on roofs without restriction on number, spacing or position.
Q. How do I ensure a Roof Window is square in a roof?
Q. What flashing do I use with a plain tile roof and a Sun Lite system?
Q. Do Sun Lite Tunnels come with a guarantee?
The production process has also been assessed by the polycarbonate manufacturer and the warranty has been extended to cover any effects of the forming process. The glazing and flashings have been impact-tested to EN 1873 Modular Roof lights and may be deemed to be non-fragile for HSG33 Safety in Roof work. Tubes and elbows have 25-year product warranty, which guarantees that the material will not splinter, yellow, darken, peel off, blister, reflectivity, even after prolonged UV exposure.
Q. Do you need planning permission for a Sun Lite tunnel?
Q. Is there a limit to the length of Sun Lite tubing?
Q. What light levels can be achieved with Sun Lite Roof lights?
Q. What roof opening size is required for the Keylite Flat Roof Window System?
• window width is -20mm
• window length +175mm
Q. Is the reflectivity of the Sun Lite tube important?
Q. What about bends in the Sun Lite system?
They are adjustable up to 30° from vertical. There should be no other bends or offsets in tubing as monitoring has shown that these will adversely affect the performance of the system. The flexible tubing offers easier installation, however, the down side of flexible tubing is the reduced reflective performance.
Q. What is a light and sun deflector?
A light and sun deflector intercepts direct sunlight that would otherwise miss the top of the system at both low and high incident angles, reflecting it down the sun Lite tube.
Monitoring has shown that a south-facing light/sun deflectors can increase the light level at the ceiling diffuser by up to 20% in direct sunlight.
Q. How do Keylite Sun Lite tubular roof lights contribute to sustainable building design?
Q. How many Roof Windows can be operated from one switch or remote?
Q. What distance is required between Roof Windows in a Combi or Bi-Lite?
• Combi: The Keylite standard Combi flashing requires a distance of 100mm between the window frames. However, we can manufacture the flashing from a minimum of 18mm apart and up to 200mm apart.
• Bi-Lite: The Keylite standard Bi-Lite flashing requires a distance of 100mm between windows.
Q. What information is required to order a vertical Bi-Lite?
• Roof window size required
• Depth of vertical window required 600 or 950mm
• Type of roof window required i.e. CP or TH
• Is it a single, double, or triple
• Roof pitch
• Type of flashing required.
Q. Can I order the electric kit and fit it to the window myself?
Q. Can a Top Hung Window operate with an electric kit or a smoke ventilation kit?
• Electric Kit: We can fit an electric kit to a top hung window, but generally this is not advisable. The advised option is to fit them to a centre pivot roof window were everything would be out of sight.
• Smoke Vent Kit (SVK): A Top Hung window does not meet regulations with regards to providing the required ventilation levels for smoke ventilation.
Q. Do electrically operated integral blinds operate with the Roof Window remote control?
Q. Is factory fitting an electric operation kit more expensive?
If a window is ordered along with an electric kit we will fit it free of charge.