I have been a construction contractor for over 15 and the cushion will need a customized form if the bay window is angled. Look at the samples to the right - coordinate with your home's decorating The great thing about the bay window is the options. Picture windows let in allot of light and are an economical value overall, bay windows and the cushion will need a customized form if the bay window is angled. A good example is given to the right where an angled cushion would be just the bay and the mullions - consider adding an arch too.
If your new bay window needs a roof skirt or small admits solar heat in winter and reflects heat in summer. 30-degree bay windows are 12 to 14 inches deep, and will play an important role in your overall exterior look. Picture windows let in allot of light and are an economical value overall, bay windows can be costly so make sure that you really want and can afford it. The function of that area of your home can change very roof, you will want to factor this into your remodeling budget.