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

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

The most important thing to consider when looking into exterior wall siding is “getting multiple estimates”!
Let’s obtain at least three estimates from exterior renovation companies that cover the Sumida area!

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 materials used for 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 “5 points” that highlight the popularity of Kakeru Koumuten Co., Ltd.’s exterior wall cover method!

Point 1　Super high durability!!

Metal siding offers significantly higher 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, which is one of its strengths!
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 properties are significantly enhanced!
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, including 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 effectively prevents rainwater intrusion, significantly enhancing waterproofing.
Applying waterproof paper before installation further increases waterproofing effectiveness!

Point 5　Enhanced Aesthetics!!

Various designs such as wood grain and tile patterns

Metal siding allows for a finish that resembles a newly built structure, 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 the building and your preferences!
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 from the catalog, you can also request cut samples!

What to be cautious about when using metal siding for exterior wall covering work?

Next, we will explain the “three points to be cautious about” when performing exterior wall covering using metal siding!

Caution 1　Few contractors can perform the installation

There are significantly fewer contractors capable of performing the metal siding cover method compared to exterior painting contractors.
Many inexperienced contractors exist, leading to a higher occurrence of troubles.
Since there is often a variation in estimate costs, to ensure a satisfactory construction, if you are considering the metal siding exterior wall cover method, be sure to obtain estimates from three or more companies and carefully review the details!

Caution 2　Prone to dents and scratches

Metal siding may get 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 covering work can be considered the most extensive among exterior renovations.
While exterior painting typically takes about 2 to 3 weeks, exterior wall covering 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 covering 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 “Aiji 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 you chose us because our costs were lower and our explanations were thorough!

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 (Aiji Industry/SF-Gal Stage Shine) 　Material: Galvalume steel with heat-insulating fluorine coating 　In-house warranty: 10 years 　Manufacturer’s warranty: 10 years for fading, 10 years for rust, 10 years for perforation 　Furring strips: Made of resin

1. Painting of Accessory 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 cost estimate for performing the exterior wall cover method on a building with a floor area of 30 tsubo.

The cost of exterior wall cover work is determined by the calculation below.
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/m²~)
SGL Steel	35 to 40 years	Including tax Approximately 2,200,000 yen (Siding unit price 12,500 yen/m²~)
Aluminum	40 years 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 accessories and windows, as well as the equipment 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 difficult 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 4 points.

By confirming the above 4 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 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 attach it, 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 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, making it hard to compare estimates.
Having clear unit prices and quantities for items like base 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!

・Check the auxiliary materials that will be used!

Check not only the siding itself but also the types of detailed auxiliary materials such as “type of furring strip,” “siding fasteners,” and “type of waterproof paper“!
For example, the siding fasteners are screws, and the overall cost will differ between iron and stainless steel.
While iron may appear cheaper at first glance, stainless steel is resistant to rust and is a recommended fastener.

2. Confirm the existence of warranties and aftercare

When choosing a contractor for exterior wall cover work, be sure to check for warranties.

Exterior wall cover work is one of the more expensive types of exterior renovations, so in addition to checking for manufacturer warranties, also confirm whether the contractor offers their own warranty!
For contractors that have a warranty period, repairs may be done for free within that warranty period.

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

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 we send out annual DM, so if you wish, inspections can be done 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 it to external companies, and there is a higher likelihood of issues such as miscommunication with external contractors.

Moreover, if problems arise after the work is completed, responses may be delayed, or there may be no dealings with the external construction company, 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. specializes in roofing, exterior wall work, and scaffolding work with complete in-house construction.
Since we can assemble temporary scaffolding and perform exterior wall cover work in-house,
we can keep costs down while providing high-quality work.

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 Sumida-ku, Tokyo

The following subsidies may be available in Sumida-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 for multi-generational living is carried out, an additional 500,000 yen will be added to the above amount for young families, child-rearing households, or existing home buyers who carry out the renovation work.

3. Requirements for receiving assistance:

Securing living space: At least one floor area (excluding stairs) 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 a maintenance plan: For the maintenance period (30 years or more), the content required by the evaluation criteria must be established as a maintenance 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 even in major earthquakes	Required
Energy Conservation Measures	Insulation of windows, walls, floors, ceilings, and efficiency improvements for water heaters, etc.	Required
Ease of Maintenance and Renewal	Facilitating inspection, cleaning, and replacement of plumbing	Optional
Measures for the Elderly, etc. (for multi-family housing only)	Barrier-free design	Optional
Variability (for condominiums only)	Facilitates future changes in floor plans, etc.	Optional

4. Other Requirements:

Renovation work for areas pointed out in the inspection such as exterior wall and roof painting, exterior wall and roof replacement, and rain gutter replacement.

Implementation of Inspection: A current condition inspection by a specialist must be conducted before starting renovation work.​

Creation of 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 Insulation Only” 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 application: Owner or representative of the management association.

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

Subsidy Amount

Subsidy Rate: Within 1/3 of the eligible expenses

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

Eligible Products and Construction Conditions

Eligible products include high-performance building materials registered with the secretariat (such as insulation materials, windows, and glass), with the condition 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.

Subsidy Program for Introducing Equipment to Prevent Global Warming

Requirements

A prior application is required before starting construction. Construction cannot commence until after the application and prior consultation and approval.

For the same building, the subsidy can be applied only once per equipment.

It is possible to combine with national or prefectural subsidy programs, but the calculation will be based on the amount after deducting those subsidy amounts.

Eligible Participants

Owners of buildings located within the district (individuals, management associations of condominiums, small and medium-sized enterprises, various corporations, etc.) are eligible.

In the case of shared ownership, a power of attorney from other owners is required.

Subsidy Rate and Subsidy Amount (Maximum) [For Insulation Material Work]

Subsidy Rate: 10% of the construction costs (equivalent to 10 out of 100).

Subsidy Upper Limit：

For Individual Houses and Detached Homes：Up to 150,000 yen.

For Condominiums (Exclusive Parts)：If the applicant is a unit owner, up to 500,000 yen. However, if the management association applies, it will be the same as for individuals, which is 150,000 yen.

Please see here for more details!

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

This concludes the information about 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 wall painting, there are various benefits, making it a recommended exterior renovation.
Importantly, 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 completely in-house. We are confident that our costs, quality, and organization are unmatched 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 surveys are free!

If our construction plan is inferior to others, please feel free to decline!
You can rest assured that 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!