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What is the purpose of cutting notches in the horns when installing windows with a stool?

To create an aesthetic appearance

To extend the stool beyond the casing's edges

The purpose of cutting notches in the horns when installing windows with a stool is to extend the stool beyond the casing's edges. This design feature enhances the visual appeal of the window installation while also serving a functional purpose. By allowing the stool to project past the casing, it creates a more pronounced, traditional look that can contribute to the overall architecture of the building.

Additionally, extending the stool beyond the casing can help to manage water drainage away from the window, reducing the risk of water entering the structure. While aesthetic considerations are important, the primary function of the notches is related to installation practicality and ensuring an effective seal around the window, rather than purely for looks, insulation properties, or weight reduction.

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To allow for better insulation

To reduce the weight of the window

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