If you are looking for an exterior wall siding contractor in Shou Koumuten, Shinagawa-ku, Tokyo

This will definitely be useful for customers considering exterior wall siding in Shinagawa-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 serve the Shinagawa area!

Estimates and consultations are free!
Multiple estimates are very welcome!

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 method that overlays a new exterior wall on top of the existing one.
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 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 made Shou Koumuten’s exterior wall cover method well-received!

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 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 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 improvement 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, making it a reassuring choice for long-term exterior renovations!

Point 4　Improved Waterproofing!!

With the exterior material being double-layered, it significantly enhances waterproofing by preventing rainwater intrusion.
Applying waterproof paper before installation further increases waterproofing performance!

Point 5　Improved Aesthetics!!

Various designs such as wood grain and tile patterns

Metal siding allows for a finish that resembles new construction, which is impossible to achieve with exterior painting.
There are various designs available, from simple styles to tile and wood grain patterns.
You can choose from a variety of designs to match the atmosphere and your preferences for the building!
Major manufacturers include “Aiji Industrial“, “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 while looking at 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 to be aware of” when performing exterior wall cover work using metal siding!

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 contractors have little experience, leading to a higher occurrence of troubles.
Since there is often a variation in the estimated costs, to ensure a satisfactory construction, 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, you can request repairs from a specialized repair contractor!

Point 3　Long construction period

Exterior wall cover work can be considered the most extensive renovation among exterior renovations.
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 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 entrusted us with the “Aijii Industry/SF-Gal Stage Shine” metal siding! The above siding is 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 to 2,100,000 yen

Construction Period

Approximately 3 weeks

Existing Exterior Material/New Exterior Material

Existing exterior: ALC 　New exterior: Metal siding (Aijii Industry/SF-Gal Stage Shine) 　Material: 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 Fabrication for Accessories

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 guideline table for the costs associated with exterior wall cover work.
It serves as a cost estimate for performing the roof overlay (cover method) on a building with a total area of 30 tsubo.

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 cost + Additional painting cost = Total amount
This will be the total.

Material	Expected Durability (Years)	Cost Assuming 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 additional parts to be painted, the number of windows, and the equipment to be removed and reattached.
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 this?”
The most important thing when choosing a contractor and obtaining estimates is to always obtain multiple estimates!

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 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, confirm whether the proposed siding meets 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 directly adhere the materials, moisture cannot escape, leading to mold and corrosion, or possibly causing 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 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, ask for the reason they are not included!

・Also 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 seem 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 cover work, make sure to check for warranties.

Exterior wall cover work is one of the more expensive renovations, so in addition to the manufacturer’s warranty, be sure to confirm whether the company offers its own warranty!
If the contractor has a warranty period, they may provide free repairs within that period.

The warranty period varies depending on the contractor and the scope of work, but a 5 to 10-year period is typical.

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

Kakeru Koumuten Co., Ltd. always provides a warranty for exterior wall cover work.
We also offer after-maintenance services and send out annual DM, so if you wish, 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 cover work, be sure to obtain estimates from multiple contractors.

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

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 cover work in-house

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

Moreover, if problems arise after construction, the response may be slow, or there may be no dealings with the external contractor, 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 with complete in-house construction.
By assembling temporary scaffolding and performing exterior wall cover 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 Areas

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 Shinagawa-ku, Tokyo

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

“Long-term Excellent Housing Renovation Promotion Project”

1. Subsidy Rate:

1/3 of eligible expenses

2. Maximum Subsidy Amount:

Evaluation Standard Type (when certain performance improvements are 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/unit​

*If renovation work is carried out to accommodate three generations living together, an additional 500,000 yen will be added to the above amount for young families, child-rearing households, or existing homeowners who perform the renovation work.

3. Requirements for Receiving Subsidies:

Ensuring Living Space: The floor area of at least one floor (excluding stair areas) must be 40㎡ or more, and the total 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: For the maintenance and preservation period (30 years or more), the contents required by the evaluation criteria must be established as a maintenance and preservation plan.​

Content of Renovation Work: It is required that the renovated house complies with the following performance items.​

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 plumbing	Optional
Measures for the Elderly (for multi-family housing only)	Barrier-free design	Optional
Variability (for condominiums only)	Facilitates changes to the layout in the future	Optional

4. Other Requirements:

Renovation work for areas pointed out in the inspection includes 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” for focusing on the insulation of the living room windows .

Eligible Participants

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

Condominiums (for sale):

Individual application: Owner or representative of the management association

Overall application: Representative of the management association or a representative composed of owners of the entire building, etc.

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 are high-performance building materials registered with the secretariat (such as insulation materials, windows, and glass) that are expected to achieve energy-saving effects of 15% or more.

If only the living room is insulated, 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.

Housing Improvement Construction Subsidy Program (Eco & Barrier-Free Housing Renovation)

Eligible Applicants

Individuals who are the head of a household and own or plan to reside in a private residence in Shinagawa Ward can apply.

The income requirement is that the previous year’s income must be 12 million yen or less.

Applicants must not be in arrears on their resident tax.

Construction must utilize contractors within the ward.

It is also essential not to be using other subsidy programs concurrently.

Subsidy Rate and Maximum Subsidy Amount

Subsidy Rate: 10% of the construction cost (excluding consumption tax) will be provided.

Maximum Amount:

For residents: 200,000 yen per unit

For condominium management associations and individual rental property owners: 1,000,000 yen per case

For detailed conditions and procedures, please check this website.

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

The above is 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, there are various benefits, making it 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!

We carry out everything from temporary scaffolding work to roof work and exterior wall renovation work entirely in-house. We are confident that our costs, quality, and organization for exterior work are unmatched compared to other companies!
We welcome competitive estimates with confidence!
You’ll be glad you chose us! We take every request seriously to ensure you feel this way.
Estimates and inspections are free!

If our construction plan is inferior to others, please feel free to decline!
Rest assured, we do not charge any cancellation fees or travel expenses!

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!