House with flood damage
The housing design addresses the issue of muddy water infiltration in flood-prone areas by using a waterproof reinforced concrete first floor and elevated entrance, effectively preventing water entry and ensuring resident safety and comfort.
Patent Information
- Application Number
- JP2023195510
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-10-27
- Publication Date
- 2025-05-13
AI Technical Summary
Existing housing designs in flood-prone areas are ineffective in preventing muddy water from entering the first floor of homes, leading to damage and loss of household items.
A housing design featuring a completely waterproof first floor made of reinforced concrete with steel plates, waterproof windows, and an elevated entrance on the second floor, along with solar power generation and electric appliances for resilience during floods.
The design effectively prevents muddy water from entering the house, even during floods up to 3 meters high, while allowing residents to safely evacuate to the roof and maintain essential services like electricity and ventilation.
Smart Images

Figure 2025073941000001_ABST
Abstract
Description
[Technical field]
[0001] Housing design for flood-prone areas Summary of the Invention
[0002] How to prevent muddy water from entering the first floor of flood-prone areas When watching the news about floods on TV, many houses are flooded and muddy water has entered the houses. Mud accumulates under the eaves, tatami mats become wet and unusable, furniture and bedding are soaked in muddy water, and home appliances become unusable because of the muddy water. The household goods that people had spent their entire lives purchasing were instantly engulfed in muddy water and rendered unusable, and after the floods, piles of discarded furniture and electrical appliances were found outside homes. I think this is a problem with the way houses are constructed. We should think about ways to coexist with nature, assuming that flooding will occur. In other words, in areas prone to flooding, we should think about building houses that do not allow muddy water to get inside. I would like to propose a house that does not allow muddy water to get inside. Methods to solve this problem: 1. Make the first floor of the house out of reinforced concrete and attach steel plates to the inside to make it completely waterproof. 2. The windows on the first floor will be waterproof, like the windows in an aquarium. 3. Go up the stairs from the ground floor to the entrance on the second floor. 4. A lift can also be installed for elderly people. 5. Make sure that muddy water does not enter the house even if it is flooded to a depth of about 3 meters. 6. If the area floods, you will be able to access the roof through the attic window. 7. Solar power generation will allow you to have electricity even during a power outage. 8. Lighting, cooking, heating and cooling, and 24-hour ventilation will all be powered by electricity. 9. The second floor, third floor and attic will be made of wood for a comfortable living environment. [Brief description of the drawings]
[0003] [Figure 1] A-1 A house where muddy water does not get inside - This is an image showing a flooded area. - The normal water level is low. - During torrential rains or when a dam upstream breaks, the water level rises suddenly, overtopping the levee and flowing into residential areas. - The entire area may become flooded. [Diagram 2] A-2 Floor Plan - Floor plan of a house that appears to be the minimum size for a family of four, consisting of parents and two children, to live comfortably. - Site plan: This is the minimum size site required, measuring 5 meters wide and 26.4 meters deep, with a one-car garage and a small garden at the rear of the house. - House floor plan: A drawing of a three-bedroom house that appears to be the minimum size required. - The first floor is a completely waterproof floor made of reinforced concrete steel plates. There are bedrooms, a bathroom, a toilet, and storage. - The second floor is a daytime living space consisting of an entrance, dining room, kitchen, staircase, and living room; the staircase is made of white iron, and is a wide space that allows you to see through to the other side. - The third floor has two bedrooms and a toilet. - The attic can be used as a shelter and part of it can be used for storage. [Diagram 3] A-3 Cross-section Bird's-eye view Cross-section: - The first floor is reinforced concrete, while the second, third and attic floors are wooden. - Inside the house, the central section is the staircase, and the stairwell continues from the first floor to the attic. - The window in the attic allows light in and also serves as an escape route to the roof. - Natural light from the skylight reaches the floors below through the atrium in the staircase. Bird's-eye view: - An overall view, as if seen from high up. - The first floor is reinforced concrete and is completely waterproof. The windows are also waterproof fixed windows. - The entrance is on the second floor. Muddy water does not get into the house. - The windows on the second and third floors are on the front road side and the backyard side. - Privacy is maintained even if the houses on either side are close together. [Figure 4] - This is a cross-section of the RC wall on the first floor of the house. It shows a highly airtight, highly insulated, waterproofing method using steel plates.
Claims
[Claim 1] A proposal for flood prevention measures. This is a proposal to prevent floodwaters from entering houses in flooded areas when rivers overflow.