Points to Consider and Methods for Exterior Painting of Hebel House Buildings

Hello! We are Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior wall painting, and exterior renovations located in Aoba-ku, Yokohama, Kanagawa Prefecture!

This time, we will provide a detailed introduction to the house manufacturer Hebel House (Asahi Kasei Homes), including its features and renovation methods.

Of course, we can also carry out exterior renovations for homes built by house manufacturers, so if you have any concerns regarding your home, whether it be repairs or renovations, please feel free to contact us!

What is Hebel House (Asahi Kasei Homes)?

Hebel House (Asahi Kasei Homes) is one of the largest single-family home manufacturers in Japan, focusing on custom-built steel and wooden houses, as well as a wide range of offerings including rental housing, condominiums, urban development, and renovations.

• Founded: 1972

• Headquarters: Tokyo

• Total number of buildings constructed: Over 120,000

• Brand Series: RATIUS = A brand series with a sense of heaviness
  　　　　　　　　　FREX = A brand series with a concept of high specifications and large spaces

This house manufacturer specializes in “earthquake resistance and fire resistance,” “urban housing and small lot design,” and “long life.”

Common Exterior Features of Hebel House

The main feature of buildings constructed with Hebel House (Asahi Kasei Homes) is the adoption of exterior wall materials that balance durability and design as standard specifications.

Due to their excellent durability, caution is necessary when repainting, so we recommend entrusting the work to contractors experienced with Hebel House!

Main Exterior Wall Materials of Hebel House

We will introduce the main exterior wall materials used in Hebel House.

Hebel Power Board (ALC)

The exterior wall material “Hebel Power Board” is a lightweight aerated concrete wall panel that has been steam-cured in a high-temperature, high-pressure environment. It boasts very high fire resistance, seismic resistance, and durability, and unlike typical exterior wall materials, it is fundamentally not intended for painting.

This exterior wall material has a special coating treatment, making it difficult for paint to adhere. Therefore, when painting is necessary, it is essential to use a dedicated primer that excels in adhesion.

Fiber Cement Siding

Fiber cement siding is a board made by mixing cement and fibers and solidifying them under high temperature and pressure. It is the most widely used in Japan (with about 80% market share), known for its affordability and rich design options (such as wood grain and tile patterns), as well as its excellent fire and seismic resistance. However, the material itself lacks waterproofing, requiring regular painting (maintenance), and it tends to absorb heat. While it is easy to install and helps keep initial costs low, neglecting maintenance can lead to rapid deterioration.
During maintenance, a primer-based paint should be applied as a base coat, followed by a filler-type paint.

Galvalume Steel Sheet

Hebel House Roofs and Rooftops

Here, we will introduce the main roofing materials used in Hebel House.

Slate Roof (Color Best)

Slate roofs are widely used roofing materials in Hebel House.
Hebel House uses Colonial Grasa, which has a durability of 30 years.

The characteristics of slate roofs include being lightweight, easy to install, and excellent in cost performance. Compared to other roofing materials, they can be installed relatively cheaply, making them a popular choice. However, their lifespan is relatively short, and their waterproofing is lower than that of other roofing materials, necessitating regular maintenance.

Galvalume Steel Sheet

Galvalume steel sheet roofs are also used in the design homes of Hebel House.

They are lightweight, durable, and corrosion-resistant metal roofs that are less prone to rust than corrugated iron, with high heat insulation and seismic resistance. However, regular maintenance is also required.

Flat Roof (Rooftop Structure)

Many of Hebel House’s flat roofs use sheet waterproofing with PVC sheets.

Hebel House Balconies

Most balcony waterproofing in buildings constructed by Hebel House employs the mechanically fixed PVC sheet waterproofing method.

The mechanically fixed PVC sheet waterproofing method involves mechanically securing polyvinyl chloride (PVC) waterproof sheets to the substrate with anchors, forming the waterproof layer.

The main repair methods for PVC sheet waterproofing are “replacing the PVC sheet waterproofing,” “applying a top coat to the PVC sheet waterproofing,” and “removing the PVC sheet waterproofing and switching to another waterproofing method.” The construction method will vary depending on the degree of deterioration and the points of emphasis, so be sure to check with your contractor.

Joint of Hebel House

The joint refers to the gap (joint part) between building materials.

Water and moisture can infiltrate through the joints more than through the exterior walls, which can adversely affect the entire home.

At Hebel House, AK Seal PU1 (high durability polyurethane joint sealant) is often used.

The sealing material is a very important component that fills the gaps between Hebel Power Board panels and other materials, preventing rainwater intrusion. The genuine sealing material for Hebel Power Board is based on the combination with ALC material and has been thoroughly tested from various angles to ensure it is a high durability sealing material suitable for Hebel Power Board exterior walls. The more you know, the more you can trust this sealing material for customers who have adopted Hebel Power Board.

If you paint without using a dedicated primer, it can lead to issues such as paint film peeling, so it is recommended to hire a contractor who has experience in constructing buildings made with Hebel House.

Points to Consider When Painting the Exterior of Hebel House

When painting the exterior of a Hebel House building, there are three main points to consider.

Let’s explain each point in detail!

Choose Paint Suitable for ALC Exterior Walls

Hebel House often uses paint with colors and patterns for the spray painting of ALC during new construction. If you paint over these with a single color, the original colors and patterns will be completely covered.
For this reason, selecting a multi-colored spray paint for remodeling allows you to maintain the original tones and shapes, resulting in an exterior wall with high design quality once again.

If you want to maintain the texture from the time of new construction or wish to repaint with a design that conveys a sense of heaviness and luxury, using multi-colored paint is recommended.

Caulking of Joints is Necessary for ALC Exterior Walls

For joints in ALC exterior walls, since the panels are joined edge to edge, caulking is required for the joints on all four sides.

On the other hand, for siding exterior wall joints, the joints are typically interlocked with either two or four directions of the long sides, so caulking is necessary for the joint areas without interlocking but not required for the interlocked joints.

Interlocking joints refer to a joining method where the edges of two siding boards are cut halfway through their thickness and then overlapped, with the cut portion referred to as the interlock.

Since caulking is not required for the interlocking joints, the amount of caulking needed for siding is less than that for ALC.

Check the House Manufacturer’s Warranty

When considering exterior renovations for a Hebel Haus building, don’t settle for just one company; obtain estimates from multiple companies and compare them!
When getting estimates, it’s important to check not only the cost but also the details of the estimation process and materials used. Make sure to confirm, “Is this renovation method suitable for the building? Are appropriate materials being used?”

For Hebel Haus renovations, choose Kakeru Koumuten Co., Ltd.!

Many people may think that when they want to renovate a house built by Hebel Haus, only that house manufacturer can perform the work.

In reality, this is not the case, and there are many contractors with extensive experience.
However, because Hebel Haus buildings often use special exterior materials due to their high durability and quality, caution is necessary during renovations!

Kakeru Koumuten Co., Ltd. has handled numerous exterior renovations for buildings from various house manufacturers.
From temporary scaffolding work to roof work and exterior painting, we perform all tasks with complete in-house construction, and we are confident that our “cost, quality, and efficiency” are unmatched!

Because we are confident, we welcome estimates, and of course, they are free!

We also offer comprehensive construction guarantees and aftercare services, so you can feel secure in your request.

“I’m glad I chose you!” is what we aim for, and we take every request seriously. Whether it’s a small issue with your roof, rain gutters, exterior walls, or landscaping, or if you’re facing an urgent problem, please feel free to consult with us!

We look forward to your inquiries.

Service Areas

Kakeru Koumuten Co., Ltd. is based in Aoba-ku, Yokohama, and can serve not only within Yokohama and Kawasaki but also almost all areas of Kanagawa Prefecture and Tokyo. If you have concerns in Saitama, Chiba, or Yamanashi, please contact us!

Tokyo

Akishima City / Akiruno City / Adachi Ward / Arakawa Ward / Itabashi Ward / Inagi City / Edogawa Ward / Ome City / Edogawa Ward / Ome City / Ota Ward / Katsushika Ward / Kita Ward / Kiyose City / Kunitachi City / Koto Ward / Koganei City / Kokubunji City / Kodaira City / Komae City / Shinagawa Ward / Shibuya Ward / Shinjuku Ward / Suginami Ward / Sumida Ward / Setagaya Ward / Taito Ward / Tachikawa City / Tama City / Chuo Ward / Chofu City / Chiyoda Ward / Toshima Ward / Nakano Ward / Okutama / Nishitokyo City / Nerima Ward / Hachioji City / Hamura City / Higashikurume City / Higashimurayama City / Higashiyamato City / Hino City / Fuchu City / Fussa City / Bunkyo Ward / Machida City / Mitaka City / Minato Ward / Musashimurayama City / Musashino City / Meguro Ward

Kanagawa Prefecture

Aikou-gun, Aikawa Town / Ashigarakami-gun, Oi Town / Ashigarakami-gun, Kaisei Town / Ashigarakami-gun, Nakai Town / Ashigarakami-gun, Matsuda Town / Ashigarakami-gun, Yamukita Town / Ashigarashimo-gun, Hakone Town / Ashigarashimo-gun, Manazuru Town / Ashigarashimo-gun, Yugawara Town / Isehara City / Odawara City / Kamakura City / Kawasaki City / Asao Ward / Sai Ward / Takatsu Ward / Tama Ward / Nakahara Ward / Miyamae Ward / Kozu-gun, Samukawa Town / Zushi City / Chigasaki City / Nakagun, Oiso Town / Nakagun, Ninomiya Town / Hadano City / Hiratsuka City / Fujisawa City / Miura-gun, Hayama Town / Miura City / Minamiashigara City / Yokosuka City / Yokohama City / Aoba Ward / Asahi Ward / Izumi Ward / Isogo Ward / Kanagawa Ward / Kanagawa Ward / Kanazawa Ward / Konan Ward / Kohoku Ward / Sakae Ward / Seya Ward / Tsuzuki Ward / Tsurumi Ward / Totsuka Ward / Naka Ward / Nishi Ward / Hodogaya Ward / Yokohama City, Midori Ward / Yokohama City, Minami Ward / Sagamihara City / Sagamihara City, Midori Ward / Sagamihara City, Minami Ward / Sagamihara City, Chuo Ward / Ebina City / Atsugi City

・Saitama Prefecture, Chiba Prefecture, and parts of Yamanashi Prefecture (please consult us)

よろしければこちらもご覧ください！

・【Tachikawa City, Tokyo】We performed a roof replacement with洋瓦〜スーパーガルテクト!
・【Yokosuka City】We conducted a roof overlay using highly wind-resistant roofing materials recommended in Yokosuka City!
・【Minami Ward, Yokohama】We repaired only the eaves gutter (horizontal gutter) that was damaged by wind disasters!
・【Higashiyamato City, Tokyo】We performed exterior wall painting and joint replacement work using Escape Premium Silicon!
・【Asahi Ward, Yokohama】We conducted roof painting, wood deck painting, and wave board replacement!!
・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 exterior wall painting | Kakeru Koumuten’s exterior wall painting plan!
・What is the necessity and timing of exterior wall painting…? Kakeru Koumuten Co., Ltd. will explain!
・【Yokohama】| Exterior wall painting | We will explain the importance of comparative estimates and points to compare!

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For roofing, guttering, and exterior work and repairs in Kanagawa, contact Kakerukoumuten Co., Ltd..

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!