If you are looking for an exterior wall siding contractor in Itabashi-ku, Tokyo, visit Kakeru Koumuten Co., Ltd.

This will definitely be helpful for customers considering exterior wall siding in Itabashi-ku, TokyoPlease take a look!

The most important thing to consider when thinking about exterior wall siding is “multiple estimates”!
Let’s get at least three estimates from exterior renovation companies that cover Itabashi-ku!

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 that overlays a new exterior wall on top of the existing exterior wall.
It can be applied to 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.

Although the cost is 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 popular?

Here are the “five points” that have earned Kakeru Koumuten Co., Ltd. high praise for its exterior wall cover method!

Point 1　Super high durability!!

Metal siding offers an overwhelmingly high expected durability compared to exterior wall 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 break, 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 wall cover method has integrated insulation material.
Moreover, by installing battens before the metal siding installation to create a ventilation layer, the insulation performance is 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 wall 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 performance!

Point 5　Improved Aesthetic Appeal!!

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 that match the atmosphere and your preferences of the building!
Major manufacturers include “Aiji Industry“, “Keimyuu“, “Nichiwa“, and “Asahi Tostem“, each offering a wide range of types and designs of metal siding.
If you find a product you are interested in from the catalog, you can also request cut samples!

What are the points to be aware of when doing exterior wall cover work with metal siding?

Next, we will explain the “three points of caution” when using metal siding for exterior wall cover methods!

Caution 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 incidence of troubles.
Since there is often a variation in estimation costs, to ensure a satisfactory construction, if you are considering the exterior wall cover method with metal siding, it is advisable to obtain estimates from three or more companies and carefully review the details!

Caution 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, you can request repairs from a specialized repair contractor!

Caution 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 nearly 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 a renovation of the exterior walls. I would like to use high-durability metal siding with a solid warranty. Since this is a comparative estimate, I would like to request a quote for the same type of metal siding as the estimates from other companies.

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 “Aijii Kogyo/SF-Gal Stage Shine” metal siding! The above siding is a product made of Galvalume steel with heat-insulating fluorine coating, and it is integrated with insulation material, providing excellent thermal insulation. You mentioned that you obtained estimates from three companies, and we were able to secure your order due to our competitive pricing and thorough explanations compared to other companies!

Price Range

2,000,000 – 2,100,000 yen

Construction Period

Approximately 3 weeks

Existing Exterior Material/New Exterior Material

Existing exterior: ALC 　New exterior: Metal siding (Aijii Kogyo/SF-Gal Stage Shine) 　Material: Made of Galvalume steel with heat-insulating fluorine coating 　In-house warranty: 10 years 　Manufacturer warranty: 10 years for fading, 10 years for rust, 10 years for perforation 　Furring strips: Made of resin

1. Painting of Attached Parts

2. Removal of Equipment

3. Substrate Adjustment

4. Waterproof Paper Installation (may not be necessary)

5. Installation of Battens

6. Metal Work Processing

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 showing the estimated costs for exterior wall cover work.
It serves as a reference for the costs associated with a 30-tsubo exterior wall cover method.

The cost of the exterior wall cover work will be estimated based on 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	Including Tax Approximately 2,000,000 yen (Siding unit price 11,000 yen/m²~)
SGL Steel	35 to 40	Including Tax Approximately 2,200,000 yen (Siding unit price 12,500 yen/m²~)
Aluminum	40 or more	Including Tax Approximately 2,500,000 yen (Siding unit price 14,000 yen/m²~)

The amount will vary depending on the number of painted auxiliary parts and windows, as well as the equipment that needs to be removed and reattached.
Please note that this is just a rough estimate, and detailed quotes 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 challenging to find a reliable contractor, such as “where should I request?”
The most important thing in choosing a contractor and obtaining a quote is to always obtain multiple quotes!

For this reason, when requesting exterior wall cover work, let’s check the following four points.

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 needs?

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 siding proposed aligns with your original requirements!

・Is the proposed construction 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 skip creating a ventilation layer and apply it directly, moisture cannot escape, which can lead to mold, corrosion, and potential peeling or lifting of the exterior wall material.
Check whether the proposed construction is appropriate!

・Are the quantities and construction details described in detail?

If the estimate states something vague like “exterior wall cover work 1 set,” it will be difficult to understand the construction method and what the costs are for.
Having clear unit prices and quantities for items like foundation water drainage and edge trim will provide peace of mind and help prevent issues.
If there are items of concern that are not included in the estimate, check the reason for their exclusion!

・Also check the auxiliary materials to be used!

Check not only the main siding 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 presence 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 by contractor and the specifics of the work, but a 5 to 10-year range is typical.

Additionally, some contractors offer after-sales service separate from warranties, so be sure to check if the contractor you are considering has after-sales service.

Kakeru Koumuten Co., Ltd. always includes a warranty with exterior wall covering work.
We also provide after-maintenance services, and we send out annual DM reminders, so if desired, inspections can be conducted every year.

Warranty and Payment翔工務店の屋根工事、外壁塗装工事、シーリング工事の保証など簡単にご説明させて頂いております！！ 弊社では前金、中間金は頂いておりません！！...

3. Obtain estimates from multiple contractors (at least 3 companies)

When requesting exterior wall covering work, be sure to get estimates from multiple contractors.

The cost of the same repair can vary between contractors, as can warranties and after-sales services.

Additionally, obtaining multiple estimates makes it easier to negotiate prices.

To request your desired repair contractor at the best possible price, 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 materials!

4. Confirm whether the company performs exterior wall covering work in-house

There are differences in costs between companies that handle the work in-house and those that outsource it to external companies, and there is a higher likelihood of miscommunication and other issues with external contractors.

Moreover, if problems arise after construction, responses may be slow, or there may be no dealings with the external construction company, leading to further complications.
Being able to respond immediately when issues arise is one of the reasons why companies that perform the work in-house are recommended!

About Kakeru Koumuten Co., Ltd.

Kakeru Koumuten Co., Ltd. specializes in roofing, exterior wall work, and scaffolding work with complete in-house construction for exterior renovations.
By assembling temporary scaffolding and performing exterior wall covering work in-house,
we can keep costs down while ensuring high-quality construction.

Company Introduction

Corporate Profile神奈川で家の外装・屋根の工事、修理なら一番若くて親切な株式会社翔工務店にお任せください。 株式会社翔工務店はリフォームを通して美しく理想の生活空間を創るお手伝いをしています。外装改修、外壁塗装、雨樋修理清掃、屋根の塗装や重ね葺き葺き変えなどの部分的な修理まで、お客様のどのようなご要望にも全力でお応えします。...

Customer Reviews

Service Area

Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo Metropolis.

Click here for inquiries to Kakeru Koumuten Co., Ltd.!

Possible Subsidies and Grants in Itabashi-ku, Tokyo

The following subsidies may be available in Itabashi-ku, Tokyo.

“Long-term Excellent Housing Renovation Promotion Project”

1. Subsidy Rate:

One-third of the eligible expenses

2. Maximum subsidy amount:

Evaluation standard type (when a certain level of performance improvement is recognized):​800,000 yen per unit

Certified long-term excellent housing type (when obtaining certification for long-term excellent housing (renovation)):​1,600,000 yen per unit​

*If renovation work is carried out to accommodate three-generation cohabitation, an additional 500,000 yen will be added to the above amounts for young families, child-rearing households, or existing home buyers who carry out renovation work.

3. Requirements for receiving the subsidy:

Ensuring living space: The floor area of at least one floor (excluding stair areas) must be 40㎡ or more, and the total floor area must be 55㎡ or more.​

Living environment: If located within areas such as district plans or landscape plans, it must be in harmony with them.​

Development of maintenance and preservation plan: A maintenance and preservation plan must be established for a period of 30 years, detailing the requirements set by the evaluation standards.​

Content of renovation work: The renovated residence must comply with the following performance criteria.​

Performance Item	Overview	Required/Optional
Measures against deterioration of structural framework	Prevention of decay and termite damage to pillars, floors, etc.	Required
Earthquake Resistance	Ensuring earthquake resistance to prevent collapse during major earthquakes	Required
Energy Conservation Measures	Insulation of windows, walls, floors, ceilings, and efficiency improvements for water heaters, etc.	Required
Ease of Maintenance and Updates	Facilitating inspection, cleaning, and replacement of water supply and drainage pipes	Optional
Elderly Support Measures (for multi-family housing only)	Barrier-free design	Optional
Variability (for condominiums only)	Facilitates future layout changes	Optional

4. Other Requirements:

Renovation work for points indicated in the inspection including exterior wall and roof painting, exterior wall and roof replacement, and rain gutter replacement.

Conducting Inspections: A current condition inspection by a specialist must be conducted before starting renovation work.​

Creating a Maintenance Plan and Renovation History: Develop a maintenance plan after renovation and create and preserve a history of the work.

For detailed conditions and procedures, please check the official website of the Ministry of Land, Infrastructure, Transport and Tourism.

Existing Housing Insulation Renovation Support Project

Overview of the System and Target Construction Categories

System Name: Existing Housing Insulation Renovation Support Project (Ministry of the Environment subsidy, executed by the Hokkaido Environmental Foundation)

This is a format where you can choose either one of the plans: “Total Insulation” for insulating the entire house or “Living Room Only Insulation” focusing on the windows in the living room.Choose one of the two plans.

Eligible Participants

Single-family Homes: Individual owners or those who plan to own in the future.

Condominiums (for sale):

Individual applications: Owners or representatives of the management association.

Overall applications: Representatives composed of the management association or owners of the entire building.

Subsidy Amount

Subsidy Rate: Up to 1/3 of eligible expenses

Maximum Subsidy Amount (per dwelling): Up to 150,000 yen

Eligible Products and Construction Conditions

Eligible products must be registered with the secretariat as eligible products, including high-performance building materials (insulation, windows, glass, etc.), and it is required that energy-saving effects are expected to be over 15%.

For insulation only in the living room, it is mandatory to “renovate all windows in the living room,” and the methods eligible are “roof overlay (cover method),” “inner windows,” and “outer window replacement.”

For detailed conditions and procedures, please check this website.

Trust your exterior wall cover work to Kakeru Koumuten Co., Ltd., the exterior renovation specialists!

This concludes the information on the exterior wall cover method.

Exterior renovations that significantly improve insulation and provide a stylish look like new construction are limited to exterior wall siding work.
While the cost is higher compared to exterior painting, there are various benefits, making it a recommended exterior renovation.
Importantly, if you are considering exterior wall cover work, be sure to obtain estimates from at least three different companies!

Our company specializes in exterior renovations, so if you have any concerns regarding roofs, rain gutters, or exterior walls, please consult Kakeru Koumuten Co., Ltd.!

We carry out everything from temporary scaffolding work to roof construction and exterior wall renovation entirely in-house. We are confident that our costs, quality, and efficiency in exterior work surpass those of other companies!
We welcome competitive estimates with confidence!
You’ll 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!
There are no cancellation fees or travel expenses, so please rest assured!

We look forward to your inquiries. Thank you very much.

We welcome inquiries via LINE as well◎

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!