Hi,
Below is a pic of the roof of my extension, built I think around 1990. The roof is built on to wooden joists, coming out from the back of the house, which was built around 1820. The high edges are due to a short slope of slate at the front, which can be seen in the next picture, presumably done to blend with the slate roof of the old house. There is very little in the way of insulation in the small space between the joists, and the ceiling inside is quite low restricting internal insulation.
My thinking was whether this very deep space above the roof might be ideal for an inverted roof. I understand that there can be a weight issue that might be too much for a wooden deck, but my understanding is that this is mainly due to the ballast. Not sure if much ballast would be needed in this case as the insulation could be butted up against the wall surrounding the roof, as I presume it is the edges where the wind lift is most likely to occur. Obviously the skylights would need to be raised, but they need replaced anyway as there are clouded, but beyond this would this plan be fee-sible and any recommendations on how to proceed?
Below is a pic of the roof of my extension, built I think around 1990. The roof is built on to wooden joists, coming out from the back of the house, which was built around 1820. The high edges are due to a short slope of slate at the front, which can be seen in the next picture, presumably done to blend with the slate roof of the old house. There is very little in the way of insulation in the small space between the joists, and the ceiling inside is quite low restricting internal insulation.
My thinking was whether this very deep space above the roof might be ideal for an inverted roof. I understand that there can be a weight issue that might be too much for a wooden deck, but my understanding is that this is mainly due to the ballast. Not sure if much ballast would be needed in this case as the insulation could be butted up against the wall surrounding the roof, as I presume it is the edges where the wind lift is most likely to occur. Obviously the skylights would need to be raised, but they need replaced anyway as there are clouded, but beyond this would this plan be fee-sible and any recommendations on how to proceed?