Interior Transom Window Over French Doors

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Double doors are often used for room transitions so adjoining rooms can occasionally be closed off from one another. A transom over a double door better visually connects the two rooms and shares light between the two.

Pro-Tip: The pattern or design of the muntins for the transom usually does not align with the muntin bars or stiles of the doors below. This is normal -- there is no need to align them.

A taller mull is an increased thickness of the area that separates the doors from the transom above. This modification to the standard installation is purely aesthetic, and can add some additional styling to an opening -- especially when combined with other trim elements in the room.

The transom below has a taller mull, but also take notice how perfectly it was sized into the opening between the fireplace and china cabinet. The double doors and transom truly connect this dining room to the adjoining sun room.

The picture below is perhaps a perfect example of a well executed transom over the top of a set of pocket doors. As you will learn in the planning section, because of the hardware required to hang a pocket door, transoms above pocket doors appear to have a taller mull in all circumstances.