This section is from the book "Cyclopedia Of Architecture, Carpentry, And Building", by James C. et al. Also available from Amazon: Cyclopedia Of Architecture, Carpentry And Building.
The most simple way of supporting the gutter is to let the main rafters of the roof framing extend out over the wall as far as necessary and cut a rabbet in the end of each of them into which the gutter will fit. In this case the wood gutter should be used. It is fastened into the notches left in the ends of the rafters, as shown in Fig. 282. In this figure, A is the gutter, B is the rafter, C is the studding of the building, D is the plate with the rafters cut over it and the ceiling joists E resting on top of it, F is the outside boarding, which may be covered with clapboards or shingles, and G is the roof boarding, which may be covered with shingles or slates. In one respect the construction shown in this figure is faulty, because the gutter being placed in the position shown, snow sliding off the roof would catch the outer edge of it and perhaps tear it off. The gutter should, wherever possible, be placed low enough so that the line of the finished roof, H in the figure, will clear the edge of it. In order to improve the appearance of the eaves it is well to place a board J along the edge of the rafters so as to hide them and present a plain surface to the eye and to finish the joint between this board and the under side of the gutter with a small bed molding A'. Underneath the rafters where they cross the plate and come through the outside boarding is placed a board L which forms a stop for the siding or shingles, and another board should be inserted between this and the under side of the roof boarding, as shown at M. It is also a good plan to cover the ends of the ceiling joists with a strip of boarding to keep the wind out of the roof space. This is shown at 0. The finish shown in Fig. 282 is of the simplest and barest kind and can be used only for buildings of an unimportant character such as stables and outhouses or for cheap country houses.
Fig. 282. Section Showing Open Cornice Construction.