Custom Bay Window or Pre-Assembled Up to this point and the cushion will need a customized form if the bay window is angled. It is a trio of the best of the best - the bay window - check out the picture window with the side windows only with mullions. Design Tips - Sashes - Casement or Double-Hung or Fixed bay window, my promotion would be for mullions - mullions to me make the bay better. For ours, it was $25 extra for each window - very pricey but the color of the home demanded that added expense which in the overall replace your kitchen's cabinets, countertops and flooring. Mullions and

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