I have a ground floor flat c1901 the bathroom of which is a more recent extension (1980s?). The bathroom is surrounded on all sides by other flats and my own and as such has a skylight rather than a window.
The skylight is raised above roof level and has aluminium ventilation flaps on all sides. A pole with hook is used to open the flaps. The problem is that the flaps no longer shut properly and even if they did the insulation value of the single glassed glass is poor. The bathroom is freezing and costing a fortune to heat and the skylight is an eye sore.
I have been advised that since the skylight is in a flat roof and does not leak its best left in place. I therefore plan to fit a 2nd sheet of frosted double glassed glass flush with the internal ceiling to make the room warmer and to hide the ugly skylight. Obviously i will need some form of ventilation so an extract fan is required. I plan to have the extract fan in the new glass panel pumping expelled air into the void above. I will jam the flaps in the open position to ensure the void is ventilated; an alternative idea is to run a duct from the extract fan up through the upper glass and fit a rain proof capping. The duct will need sealing to the upper sheet of glass to prevent rain water running in (it pools slightly on the upper sheet).
My questions are:
1) Will idea 1 meet with building regs and am i likely to experience a build up of mould in the void?
2) If idea 1 is out will i have problems with idea 2? Will sealing the duct to the glass be possible?
3) If both of the above are out what do i do?
thanks, James
The skylight is raised above roof level and has aluminium ventilation flaps on all sides. A pole with hook is used to open the flaps. The problem is that the flaps no longer shut properly and even if they did the insulation value of the single glassed glass is poor. The bathroom is freezing and costing a fortune to heat and the skylight is an eye sore.
I have been advised that since the skylight is in a flat roof and does not leak its best left in place. I therefore plan to fit a 2nd sheet of frosted double glassed glass flush with the internal ceiling to make the room warmer and to hide the ugly skylight. Obviously i will need some form of ventilation so an extract fan is required. I plan to have the extract fan in the new glass panel pumping expelled air into the void above. I will jam the flaps in the open position to ensure the void is ventilated; an alternative idea is to run a duct from the extract fan up through the upper glass and fit a rain proof capping. The duct will need sealing to the upper sheet of glass to prevent rain water running in (it pools slightly on the upper sheet).
My questions are:
1) Will idea 1 meet with building regs and am i likely to experience a build up of mould in the void?
2) If idea 1 is out will i have problems with idea 2? Will sealing the duct to the glass be possible?
3) If both of the above are out what do i do?
thanks, James