DIY – How to install a skylight
Upon arrival on-site set up all appropriate drop sheets for the job. If it is going to be a “messy” job place drop sheet divides between the rooms and or close the appropriate doors.
Locating the position of the skylight installation
- NOTE: Always check final location with the customer before making final larger cuts.
- Tile roof – When locating a tile roof skylight it usually easier to measure off the walls to the desired location, line the location up with something outside and then mirror the same measurements once on the roof. (You can place a marker on the gutter if that helps you keep the correct starting point). Before getting on the roof take note of any light fittings or ceiling fittings that may help you with your location when looking inside roof. (Even turn on the lights as this can be like a beacon of correct location, the simply measure how far off the light the skylight needs to be.) Once you have measured out the approximate location of the skylight, kick up the tiles and check your location from the top. When you are happy with location with regard to truss, baton and tile lines drill a small 1/8 hole so you can easily locate it from the bottom when cutting in the ceiling surround
- Color-bond – When locating on a color-bond roof it is usually easier to access the manhole and locate it from within the roof cavity. Simply measure off a light fitting to locate where you need to be. (if there are down lights in the house be sure to turn them on as they are a great help) Once you have drilled hole locating the ceiling surround, drill another corresponding hole above that in the color-bond roof locating the position of the top flashing. Helps to drill through a larger roof screw to help you locate your position once on top of the roof.
- Round – Cut yourself a smaller peep hole before you cut around the perimeter of the section to check for power or light leads that could be present. Once you happy that the section is free of hazards and clear for the surround to fit, cut out the measured section. NOTE: check light fittings, that may be close by, are firmly secured as they can wriggle loose
with vigorous cutting or sawing. Once all this has been checked and completed you are free to fit the ceiling surround using the appropriate fixings.
- Square/ Rectangular – Cut yourself a smaller peep hole before you cut around the perimeter of the section to check for power or light leads that could be present. Once you happy that the section is free of hazards and clear for the surround to fit, cut out the measured section. NOTE: check light fittings, that may be close by, are firmly secured as they can wriggle loose with vigorous cutting or sawing. Once all this has been checked and completed you are free to fit the ceiling surround using the appropriate fixings.
Fitting the flashing
Depending on roof type you will have to make various cuts to suit the roof you are on. Please see instructions SB001 and SB002 manuals for your corresponding roof type.
On the roof – Before placing the dome on the skylight the shaft has to be dropped down to the opening below. This can be fixed either with clips to the lip of the skylight flashing (flexi shaft) or with a bead of silicone and a lining of silver tape (foil shaft). Once the top is secured and trimmed etc. fix the dome on the skylight with the appropriate screws and washers provided.
Inside – Make sure you pull the skylight shaft as taught as possible and free of any creases as possible as this will increase the amount of reflected light travelling down the shaft. NOTE: never have more than a 45 degree angle on your Skylight shaft. If there needs to be more than that than you have positioned it incorrectly. This sort of angle will not reflect the required amount of light to make the skylight shine to its full potential.
The diffuser should always be placed in the surround with the rough side facing down as the prisms refract more light over a larger area. If the diffuser is not prismatic then obviously this does not apply.