Hello! This is Kakeru Koumuten Co., Ltd.!
Among the techniques to extend the lifespan of your home, exterior painting, roof repairs, and leak repairs are crucial. They protect your home from various troubles and play a role in enhancing durability and maintaining aesthetics.
Let’s ensure your home lasts longer with regular checks and proper maintenance.
Basics and Benefits of Exterior Painting

◇Reasons Why Exterior Painting Prevents Leaks
Exterior painting is an important defense line that protects your home. The exterior walls of a building are directly exposed to wind, rain, and ultraviolet rays, and their condition affects the overall state of the building. If the paint peels off or cracks, rainwater can enter through the deteriorated areas, potentially causing leaks. By applying exterior paint, you can prevent rainwater intrusion and protect the wall materials.
Moreover, it also serves to protect the walls from ultraviolet rays, extending the lifespan of the building. Exterior painting is one of the essential maintenance tasks that protect the entire structure, and when done at the right time, it helps prevent leaks.
◇Appropriate Timing for Exterior Painting
The general guideline for the timing of exterior painting is around 10 to 15 years after construction. This is merely a guideline, and the actual timing may vary depending on the condition of the building and its environment.
For instance, in high-temperature and high-humidity environments or areas with strong sunlight, the deterioration of paint may accelerate. Identify the appropriate timing to carry out exterior painting that enhances the building’s durability and saves on repair costs.
Importance and Methods of Roof Repair
◇Types of Roofs and Their Characteristics
There are various types of roofs, each with its own characteristics, advantages, and disadvantages.
For example, “slate roofs” come in both decorative slate and natural slate, and their appeal lies in low cost and diverse designs. It is necessary to consider their fragility and maintenance requirements.
“Galvalume steel roofs (metal roofs)” excel in durability, lightweight, and earthquake resistance. “Ceramic tiles” are characterized by traditional beauty and durability, making them a suitable choice for Japan’s climate.
Choosing the right roofing material contributes to preventing leaks throughout the house. While considering expert opinions, let’s select roofing materials that suit your home.
◇The Importance of Painting to Protect Roofing Materials
The purpose of roof painting is to protect the surface of roofing materials from harmful substances such as dust and dirt in the air, as well as soot emitted from factories and vehicles. In particular, the harmful substances in soot are acidic and can cause chemical reactions when they adhere to alkaline cement or metal materials, leading to rust and corrosion.
Additionally, it also plays a role in preventing damage from moisture. Some roofing materials have low waterproofing properties, so painting helps prevent moisture penetration. When moisture is absorbed, the roofing material expands, and contracts when dry. This change can weaken the entire roof and shorten its lifespan, which is why proper painting is essential to protect the roof.
◇Steps and Precautions for Roof Repair
First, the steps for roof repair are as follows:
- Situation Confirmation: A professional contractor will thoroughly assess the current state of the roof, identifying the extent of damage and the cause of leaks.
- Repair Plan Development: Based on the findings, they will propose necessary repair methods, processes, and costs.
- Construction: The construction will be carried out based on the repair plan. After completion, the presence of leaks will be checked again.
Precautions include the following:
- Accurately understand the type of roofing material and choose the appropriate repair method.
- If roof damage progresses, repair costs can become high, so prompt action is necessary.
- DIY repairs can be dangerous, so it is advisable to hire a professional.
It is important to carry out roof repairs with an understanding of the steps and precautions involved.
Methods and Solutions for Leak Repair
◇Main Causes of Leaks and Countermeasures
The main causes of leaks include water infiltration from the roof or walls, clogged or damaged rain gutters, and deficiencies around windows. Let’s look at the countermeasures for each.
・Water Infiltration from the Roof or Walls
Regular inspections and maintenance are necessary. If you see damp spots on the ceiling or walls, request repairs promptly.
・Clogged or Damaged Rain Gutters
Regularly clean the rain gutters to remove debris and resolve clogs. If damage is observed, it is recommended to replace the rain gutters themselves.
・Deficiencies Around Windows
If the sealing material around the windows has deteriorated, rain and wind can easily enter. Regular inspections and early repairs are essential.
Quick action is required for leaks. As soon as you notice concerning signs, contact a professional contractor.
◇Repair Methods for Leaks from Different Areas
Buildings that have aged show signs of wear and tear. Even if you repair just one area, it is not uncommon for leaks to occur from other areas. As a key point for leak repairs, first, request a comprehensive inspection by a professional contractor.
For example, depending on the roofing material, special repair materials may be required, or painting may be necessary. We will grasp the overall picture of the leaks and propose appropriate repair methods based on that.
Furthermore, regular maintenance will be carried out after construction. To prevent the recurrence of leaks, inspections and repairs are essential. Let’s establish a leak repair plan and take measures to prolong the life of your home.
Let’s Practice Home Longevity Techniques
Exterior painting, roof repairs, and leak repairs play an important role in prolonging the life of your home. Please make use of these techniques to protect your valuable home.
Kakeru Koumuten Co., Ltd., based in Aoba-ku, Yokohama, accepts requests for exterior and roof repairs as well as renovations. Since we handle all work in-house, we can carry out exterior construction consistently. We will responsibly handle even small projects. If you are considering repairs or renovations for your exterior, roof, or rain gutters in Yokohama or the surrounding areas, please feel free to contact us.
・Aoba-ku, Yokohama | Roof Overlay (Cover Method) | We performed the roof overlay using Super Galtect!
・Aoba-ku, Yokohama | Roofing | We performed a roof replacement using Super Galtect!
・Asahi-ku, Yokohama | Roof Overlay (Cover Method) | We performed a roof overlay using Ridgeway!
・Painting DIY Plan! A must-see for those who want to try DIY roof and exterior wall painting! We will only set up the scaffolding!
・About the costs of roof overlay | Kakeru Koumuten’s roofing plan!
・About the costs of exterior wall painting | Kakeru Koumuten’s exterior wall painting plan!
・About the costs of leak repairs | Kakeru Koumuten’s leak repair plan!
・About the costs of ridge cap replacement and surface plaster | Kakeru Koumuten’s construction plan!
・Latest Edition | Grants, Subsidies, and Reduction Systems Available for Renovations!
・What are the market prices for rain gutter repairs and cleaning? Tips on timing, fire insurance, and choosing a contractor!!
・Renovation Store in Yokohama, Kanagawa Prefecture | What is roof overlay (roof cover method)?
Consultations via LINE are also very welcome◎
AAA is a young company with an average age in the early 20s, but our technology is second to none.
One of our greatest strengths is that we can do all of our own scaffolding, roofing, and painting work. In this industry, where work is generally divided, we are able to provide a complete set of services, which saves time and effort in management and reduces costs. Above all, if there is any trouble, we will come to you right away!
We can confidently declare this. We are the youngest and most friendly renovator in Kanagawa!



