1/ Safety: A threshold that is too high can pose a tripping hazard, especially if someone is carrying something heavy or if it’s difficult to see. Keeping the height low reduces the risk of accidents.

2/ Accessibility: A low threshold makes it easier for everyone to enter and exit the house, including those with mobility issues, parents with strollers, or anyone carrying heavy items.

3/ Water Management: A low threshold helps to prevent water from entering the house during heavy rains or flooding. If the threshold is too low, water can accumulate at the doorway, leading to potential water damage inside the house.

In summary, considering the height of the threshold is important for safety, accessibility, water management, and aesthetics.