Cills, drips & window boards

The following describes what is meant by the terminology 'drips', and 'cills' and 'window board' when is comes to windows. All the codes for use in the quote request form are shown in red.

Cills: The purpose of a cill is to cap the wall immediately below the window. Cills don't have to be timber; they can be stone, concrete, tiles or bricks. The first photo below is that of a timber window. At the bottom of the window, a protruding timber cill can be seen which projects out further than the brickwork. The second photo shows a window with a brick cill and third photo has a concrete cill. Having a cill which isn't part of the window is considered to be more aesthetically pleasing and is sometimes essential to achieve the desired appearance of the window, e.g., a traditional window is supposed to be flush without anything protruding.

When it comes to our timber cills, there are three options: Flush Cill (FC), 70mm Protruding Cill(PC) and Stub Cill (SC), photos of which are below.

The photo below shows a 70mm protruding cill. If you require this cill, use code 'PC' in the quote request form.

The photo below shows a window with a flush timber cill. If you require this, use code 'FC' in the quote request form.

Below is a photo of a timber window that has timber Stub Cill(SC) on top of a concrete cill. A timber stub cill is used when the window needs to be set back into the reveal further than the cill it sits on. We usually make this stub cill protrude 44mm from the face of the window.

Drips (YP): In the context of windows, a drip is something which that protrudes over the face of the window and it's purpose is to help divert water from this face. The first photo below is of a window which has a drip. This drip is circled in red. As can be seen it is at the top of the window and has a capillary groove from which water will fall. A drip isn't always used. If the window is set well back into an opening and is fairly sheltered as a result, a drip isn't considered necessary. As rain never really falls vertically and often hits a window at an angle, the effectiveness of a drip can be questioned. Sometimes a drip can affect the aesthetics of a window and isn't used as a result, e.g., the second photo below shows a traditional window without a drip. The idea of a traditional window is that everything should be flush with the face of the frame and a drip would be detrimental to this.

As a side note, we believe that 'cill' is actually spelt 'sill' but we use the former because it seems to be dominant is our industry.

Window board: The first photo below, circled in red, is a 'window board'. The purpose of window boards to cap off the top of the wall immediately below the window. Coincidently, they are often used as shelves. They can be made from virtually any material including granite, MDF, timber, worktops etc... Sometimes the window board isn't needed as tiles or plasterboard can be used. See the second photo below, where tiles have been used instead of a window board.