目次
- 1
- 1.1 What is the exterior wall cover method?
- 1.2 Examples of exterior wall cover work
- 1.2.1 1. Painting of Auxiliary Parts
- 1.2.2 2. Removal of Equipment
- 1.2.3 3. Substrate Adjustment
- 1.2.4 4. Waterproof Paper Installation (may not be necessary)
- 1.2.5 5. Installation of Battens
- 1.2.6 6. Metal Work for Fittings
- 1.2.7 7. Main Construction
- 1.2.8 8. Sealing at Various Locations
- 1.2.9 9. Reinstallation of Equipment
- 1.2.10 10. Completion
- 1.3 About the Costs of Exterior Wall Covering Work
- 1.4 How to Choose a Siding Contractor
- 1.5 About Kakeru Koumuten Co., Ltd.
- 1.6 Customer Testimonials
- 1.7 Service Areas
- 1.8 Possible Subsidies and Grants in Aso-ku, Kawasaki City
- 1.9 Leave your exterior wall cover work to the exterior renovation specialists at Kakeru Koumuten!
Kawasaki CityIf you are looking for an exterior wall siding contractor in Kakeru Koumuten in Asao-ku
Kakeru Koumuten is based in Yokohama City and has handled many exterior wall cover projects!
The major benefits of exterior wall cover work are the following three points!
“Improved insulation”
“High durability with solid guarantees for peace of mind”
“Beautiful finish like a new build that cannot be achieved with exterior painting”
Exterior wall cover work is gaining attention year by year.
Here we will also introduce case studies, benefits, points to note, and costs!
For customers considering exterior wall siding in Asao-ku, Kawasaki City, this will definitely be helpful, so please take a look!
The most important thing when considering exterior wall siding is “getting multiple estimates”!
Let’s obtain at least three estimates from exterior renovation companies that cover Asao-ku, Kawasaki City!
Estimates and consultations are free!
We welcome multiple estimates!
What is the exterior wall cover method?
We will explain in detail the recommended points and precautions of the exterior wall cover method!
The exterior wall cover method is a construction process that overlays a new exterior wall on top of the existing wall.
It is possible to overlay various types of walls such as ALC walls, ceramic siding, and mortar walls.
The exterior materials used in the exterior wall cover method are generally lightweight and durable metal siding.
While the costs are higher compared to exterior painting, it is a renovation method for exterior walls that has various benefits and is gaining attention year by year.
Why is the exterior wall cover method so popular?
Here are the “five points” that have received praise for Kakeru Koumuten’s exterior wall cover method!
Point 1 Super high durability!!
Metal siding offers an overwhelmingly high expected durability compared to exterior painting.
Made of Galvalume steel, SGL steel, and aluminum, there are various types of metal siding, but with aluminum, you can expect a durability of over 40 years!
Additionally, unlike ceramic siding or mortar exteriors, it does not crack or chip, making its sturdiness one of its advantages!
If you use high-durability sealing materials, maintenance will be unnecessary for nearly 30 years!
Point 2 Improved Insulation!!
Cross-section of metal siding
The metal siding used in the exterior cover method has integrated insulation.
Moreover, by installing furring strips before the metal siding installation to create a ventilation layer, the insulation properties are significantly improved!
This enhancement in insulation is one of the major benefits of metal siding.
Point 3 Comprehensive Warranty for Peace of Mind!!
While many construction companies offer their own warranties for exterior painting, manufacturer warranties are generally not included.
Metal siding comes with solid manufacturer warranties, such as coating and perforation guarantees, providing a high level of reassurance for long-term exterior renovations!
Point 4 Improved Waterproofing!!
With the exterior material being double-layered, it effectively prevents rainwater intrusion, significantly enhancing waterproofing.
Applying waterproof paper before installation further increases waterproofing!
Point 5 Enhanced Aesthetics!!
Various designs such as wood grain and tile patterns
Metal siding allows for a finish that resembles a new build, which cannot be achieved with exterior painting.
There are various designs available, ranging from simple styles to tile and wood grain patterns.
You can choose from a variety of designs to match the atmosphere of your building and your preferences!
Major manufacturers include “Aiji Industrial“, “Keimyuu“, “Nichihara“, and “Asahi Tostem“, each offering a wide range of types and designs of metal siding.
If you find a product of interest in the catalog, you can also request cut samples!
What to be aware of when doing exterior wall cover work with metal siding?
Next, we will explain the “three points to be cautious about” when using metal siding for exterior wall cover methods!
Point 1 Few contractors can perform the work
There are significantly fewer contractors capable of performing the cover method with metal siding compared to exterior painting contractors.
Many inexperienced contractors exist, leading to a higher occurrence of troubles.
Since there is often a variation in estimated costs, to ensure a satisfactory project, if you are considering the exterior wall cover method with metal siding, be sure to obtain estimates from three or more companies and carefully review the details!
Point 2 Prone to dents and scratches
Metal siding can develop dents from impacts when objects hit it.
Additionally, being prone to scratches is one of its disadvantages.
If noticeable scratches occur and are a concern, it is possible to request repairs from a specialized repair contractor!
Point 3 Long construction period
Exterior wall cover work can be considered one of the most extensive renovations in exterior remodeling.
While exterior painting typically takes about 2 to 3 weeks, exterior wall cover work can often take close to a month.
The long construction period can be a source of stress for residents, making it one of the disadvantages.
Examples of exterior wall cover work
| Construction Details |
| Exterior wall cover work |
| Completion Date |
| January 2025 |
| Inquiry Details |
|
I am considering exterior wall renovation. I would like to use high-durability metal siding with a solid warranty. |
| Proposal Details |
| We have proposed a roof overlay method using metal siding as per your request. Since you had several preferred types of metal siding, we have created separate estimates for each! You have entrusted us with the “Aiji Industry/SF-Gal Stage Shine” metal siding! |
| Price Range |
| 2,000,000 – 2,100,000 yen |
| Construction Period |
| Approximately 3 weeks |
| Existing Exterior Material / New Exterior Material |
|
Existing exterior: ALC |
1. Painting of Auxiliary Parts
2. Removal of Equipment
3. Substrate Adjustment
4. Waterproof Paper Installation (may not be necessary)
5. Installation of Battens
6. Metal Work for Fittings
7. Main Construction
8. Sealing at Various Locations
9. Reinstallation of Equipment
10. Completion
About the Costs of Exterior Wall Covering Work
This is a table of estimated costs for exterior wall cover work.
It serves as a guideline for the cost of performing the exterior wall overlay (cover method) on a building with a floor area of 30 tsubo.
The cost of exterior wall cover work is determined by the following calculation.
Exterior wall area (㎡) × Siding unit price + Equipment removal and installation costs + Additional painting costs = Total amount
This will be the total.
| Material | Expected Durability (Years) | Cost Assuming a building area of 30 tsubo (150㎡) |
| Galvalume Steel | 30 to 35 years | Including Tax Approximately 2,000,000 yen (Siding unit price 11,000 yen/㎡~) |
| SGL Steel | 35 to 40 years | Including Tax Approximately 2,200,000 yen (Siding unit price 12,500 yen/㎡~) |
| Aluminum | 40 years or more | Including Tax Approximately 2,500,000 yen (Siding unit price 14,000 yen/㎡~) |
The amount will vary depending on the number of attached parts to be painted, the number of windows, and the equipment to be removed or installed.
Please note that this is just a guideline amount, and detailed estimates are completely free, so feel free to contact us.
How to Choose a Siding Contractor
There are fewer contractors that handle exterior wall cover work compared to exterior painting contractors, so it may be difficult to find a reliable contractor, such as “where should I request?”
The most important thing in choosing a contractor and obtaining estimates is to always obtain multiple estimates!
For this reason, when requesting exterior wall cover work, let’s confirm the following four points.
1. Check the contents and materials of the estimate
2. Confirm the existence of guarantees and aftercare maintenance
3. Obtain multiple estimates from different contractors (at least three companies)
4. Confirm whether the contractor performs the exterior wall cover work in-house
By confirming the above four points, you will be able to choose a trustworthy contractor.
1. Check the contents and materials of the estimate
When obtaining an estimate for exterior wall cover work, let’s check the following items!
・Is the proposed new siding material suitable for your requirements?
Check whether materials that meet your requirements, such as durability and insulation, are being proposed!
Since there are various types of metal siding, such as cost-effective siding and insulation-focused siding, make sure that the proposed siding aligns with your original requirements!
・Is the proposed installation method appropriate?
When performing exterior wall cover work, it is necessary to create a ventilation layer between the existing exterior wall and the new exterior wall material using a method called “ventilation method.”
If you do not create a ventilation layer and apply it directly, moisture cannot escape, leading to mold or corrosion, and may result in peeling or lifting of the exterior wall material.
Check whether the proposed work is appropriate!
・Are the quantities and construction details described in detail?
If the content is vague, such as “exterior wall cover work 1 set,” it will be difficult to understand the construction method and what the costs are for, making it hard to compare estimates.
Having clear unit prices and quantities for items like foundation water cutting and trim lengths will provide reassurance and help prevent issues.
If there are items of concern not included in the estimate, be sure to confirm the reason for their exclusion!
・Check the auxiliary materials to be used!
Check not only the siding itself but also the types of detailed auxiliary materials, such as “types of battens,” “siding fasteners,” and “types of waterproof paper“!
For example, siding fasteners are screws, and the overall cost will vary between iron and stainless steel.
While iron may appear cheaper at first glance, stainless steel is resistant to rust and is the recommended fastener.
2. Confirm the existence of guarantees and aftercare maintenance
When choosing a contractor for exterior wall covering work, be sure to check for warranties.
Exterior wall covering work is one of the more expensive types of exterior renovations, so in addition to checking for manufacturer warranties, also confirm whether the company offers its own warranty!
If the contractor has a warranty period, they may offer free repairs within that period.
The warranty period varies depending on the contractor and the specifics of the work, but a 5 to 10-year period is common.
Additionally, some contractors provide after-service separate from the warranty, so be sure to check if the contractor you are considering has after-service available.
Kakeru Koumuten Co., Ltd. always includes a warranty with its exterior wall covering work.
We also provide after-maintenance, and we send out annual DM reminders, so if you wish, inspections can be conducted every year.
3. Obtain estimates from multiple contractors (at least 3 companies)
When requesting exterior wall covering work, be sure to get estimates from multiple contractors.
Even for the same repair work, the costs can vary between contractors, as well as the warranties and after-services offered.
Additionally, obtaining multiple estimates makes it easier to negotiate prices.
To request your desired repair contractor at a lower cost, obtaining estimates from multiple contractors is essential.
When comparing estimates, consider not only the costs but also the details of the plans, materials, and auxiliary supplies!
4. Confirm whether the company performs exterior wall covering work in-house
There can be cost differences between companies that handle the work in-house and those that outsource it to external companies, and issues such as miscommunication with external contractors can also arise.
Furthermore, if problems occur after the work is completed, the response may be slow, or there may be no dealings with the external contractor, leading to potential troubles.
Being able to respond immediately when something goes wrong is one of the reasons why companies that perform the work in-house are recommended!
About Kakeru Koumuten Co., Ltd.
Kakeru Koumuten Co., Ltd. is a remodeling company based in Aoba-ku, Yokohama, Kanagawa Prefecture, specializing in roofing, exterior wall work, and scaffolding work with complete in-house construction.
By assembling temporary scaffolding and performing exterior wall covering work in-house,
we can keep costs down while ensuring high-quality work.
Company Introduction


● We store scaffolding materials!
Since we can set up temporary scaffolding in-house, we can provide high-quality exterior renovations at a lower cost!


● We store materials and tools related to exterior construction and painting!
We also store tools and materials for the exterior wall cover method!
Customer Testimonials
Service Areas
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo Metropolis.
Click here for inquiries to Kakeru Koumuten Co., Ltd.!
List of Areas in Aso-ku, Kawasaki City
Ozenji, Aso-ku / Ozenji Nishi, Aso-ku / Ozenji Higashi, Aso-ku / Okagami, Aso-ku / Katahara, Aso-ku / Kanedate, Aso-ku / Kamiaso, Aso-ku / Kuriki, Aso-ku / Kurikidai, Aso-ku / Kurihira, Aso-ku / Kurokawa, Aso-ku / Gorikida, Aso-ku / Shimoaso, Aso-ku / Shiratori, Aso-ku / Takaishi, Aso-ku / Tamabi, Aso-ku / Chiyogaoka, Aso-ku / Nijigaoka, Aso-ku / Hakusan, Aso-ku / Hayano, Aso-ku / Haruhino, Aso-ku / Higashi Yurigaoka, Aso-ku / Furusawa, Aso-ku / Hosoyama, Aso-ku / Manpukuji, Aso-ku / Minami Kurokawa, Aso-ku / Mukohara, Aso-ku / Yurigaoka, Aso-ku
Possible Subsidies and Grants in Aso-ku, Kawasaki City
The following subsidies may be available in Aso-ku, Kawasaki City.
Summary of Kawasaki City’s “Long-term Excellent Housing System”
Purpose of the System
-
This is a certification system aimed at promoting housing that can be used in good condition for a long time (long-term excellent housing).
-
It certifies plans related to the construction and maintenance of housing (“Long-term Excellent Housing Construction Plans”).
Background and Revision History of the System
-
In June 2009 (Heisei 21), the Long-Term Excellent Housing Promotion Act was enacted.
-
In 2016, the certification scope was expanded to include renovations and extensions of residential buildings.
-
From October 2022, maintenance and preservation plans for existing homes without construction also became eligible for certification.
Certification Standards (Main Points)
To receive certification, the following performance and design standards must be met:
-
Deterioration Measures: A structure with high durability, designed to withstand long-term use
-
Earthquake Resistance: Structure prepared for large-scale earthquakes and designed to mitigate expected damage
-
Flexibility: A structure that allows for flexible changes in layout
-
Ease of Maintenance: A design that facilitates cleaning, inspection, and repairs
-
Barrier-Free Design: Space designed for easy future renovations
-
Energy Efficiency: Ensuring energy efficiency, including insulation performance
-
Living Environment and Landscape: Design considerate of the surrounding environment
-
Disaster Consideration: Design responsive to natural disasters
-
Unit Area: Must meet a certain size (Detached houses: 75㎡ or more, Multi-family dwellings: 40-55㎡ or more)
Certification Application Procedures
-
Certification is conducted based on the city’s “guidelines”.
-
When applying, it is necessary to submit a pre-confirmation document for the “Residential Environment Standards” and “Disaster Consideration Standards” to verify compliance with the criteria.
-
The certification application also requires the attachment of documents such as urban planning maps.
Overall Points
| Item | Details |
|---|---|
| System Name | Long-term Excellent Housing Certification System |
| Purpose | Promotion and quality assurance of housing suitable for long-term use |
| Target | New construction, renovation, and maintenance plans for existing houses |
| Certification Criteria | Earthquake resistance, variability, energy conservation, ease of maintenance, etc. |
| Required Documents | Compliance report, urban planning maps, etc. |
For more details, please check the official website of Kawasaki City.
Leave your exterior wall cover work to the exterior renovation specialists at Kakeru Koumuten!
This concludes the information about the wall cover method.
Exterior renovations that significantly improve insulation and provide a stylish look like a new building are limited to exterior wall siding work.
While the cost is higher compared to exterior wall painting, it offers various benefits and is a recommended exterior renovation.
The important thing is, if you are considering exterior wall cover work, be sure to get estimates from at least three companies!
Our company specializes in exterior renovations, so if you have any concerns regarding roofs, rain gutters, or exterior walls, please consult Kakeru Koumuten in Yokohama!
We carry out everything from temporary scaffolding work to roof work and exterior wall renovation work completely in-house. We are confident that we will not be outdone in terms of cost, quality, and efficiency compared to other companies!
We welcome competitive estimates with confidence!
You will be glad you chose us! We take every request seriously to ensure your satisfaction.
Estimates and inspections are free!
If our construction plan is inferior to that of other companies, please feel free to decline!
We do not charge any cancellation fees or travel expenses, so please rest assured!
We look forward to your inquiries. Thank you very much.
・Trust Kakeru Koumuten Co., Ltd. for exterior renovations in Aoba-ku, Kawasaki!
・Aoba-ku, KawasakiTrust Kakeru Koumuten Co., Ltd. for roof renovations in Aoba-ku, Kawasaki!
・Trust Kakeru Koumuten Co., Ltd. for rain gutter repairs and cleaning in Aoba-ku, Kawasaki!
・Trust Kakeru Koumuten Co., Ltd. for solar panel installation in Aoba-ku, Kawasaki!
・Trust Kakeru Koumuten Co., Ltd. for exterior wall cleaning in Aoba-ku, Kawasaki!
・Trust Kakeru Koumuten Co., Ltd. for exterior wall painting in Aoba-ku, Kawasaki!
・Trust Kakeru Koumuten Co., Ltd. for waterproofing work in Aoba-ku, Kawasaki!
・Trust Kakeru Koumuten Co., Ltd. for leak repairs in Aoba-ku, Kawasaki!
・After maintenance by Kakeru Koumuten Co., Ltd.
・Construction menu and price list from Kakeru Koumuten Co., Ltd.
・Staff blog and announcements from Kakeru Koumuten Co., Ltd.
We welcome inquiries via LINE as well◎
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!







