We have a 23-year-old felt flat roof on a ground floor extension five metres square which is cracking and needs to be replaced. We do not want to have a "torch-on" felt roof (neighbours had their ...

Even though joists go in level, firring pieces are used to give it a small fall, (about 1:60 or 1 degree), and direct water to an outlet or gutter. Flat ... of a roof garden? Torch-on felt is ...