Hello! This is Kakeru Koumuten Co., Ltd. from Aoba Ward, Yokohama City.

When considering renovations, one of the concerns that is just as important as the details and costs of the work is the warranty and aftercare after the construction, isn’t it?

  • What happens if there are issues after the work is completed?
  • What types of work come with a warranty?
  • Is there a warranty for interior renovations and water-related work?

On this page, we will introduce the warranty details for Kakeru Koumuten’s exterior and interior renovations, as well as the aftercare provided after construction!

About Kakeru Koumuten’s Warranty

About Kakeru Koumuten's Warranty

At Kakeru Koumuten, we provide warranties tailored to the type of work, ensuring that our customers can live comfortably even after the construction is completed.

We handle not only exterior work such as roofs, walls, and rain gutters but also interior renovations including wallpaper, flooring, substrates, water-related work, and equipment.

The warranty period and coverage depend on the type of work, materials used, and installation locations. Detailed warranty information will be explained by your representative.

Warranty Details for Exterior Renovations

Sealing Work | Warranty 3 to 8 Years

Sealing replacement work comes with a warranty based on the materials used.

Materials Used Warranty Period
Urethane/Silicone-based 3 Years
High Durability Sealing
Oton Exceed・SR Seal H100
8 Years

Exterior Wall Painting | Coating Warranty 5 to 15 Years

The warranty period for exterior wall painting varies depending on the paint used and the symptoms covered by the warranty.

Examples of Warranty for Peeling and Blistering

Paint Warranty Period
Premium Silicon 10 years
Silicon Revo 10 years
Fluorine Revo 13 years
Super Seran Flex 15 years

Chalking and Fading Warranty Examples

Paint Warranty Period
Premium Silicon 5 years
Silicon Revo 5 years
Fluorine Revo 8 years
Super Ceram Flex 10 years
Nano Composite 5 years
Premium Inorganic 8 years

Roofing Work | Workmanship Warranty & Manufacturer Warranty

For roofing work, Kakeru Koumuten Co., Ltd. provides a workmanship warranty and a manufacturer warranty depending on the roofing materials used. The details and duration of each warranty vary.

Example of Super Galtect Warranty

  • Kakeru Koumuten Co., Ltd. Workmanship Warranty: 10 to 15 years
  • Manufacturer Warranty: Coating 15 years, Puncture 25 years

Example of Diplomat Star Warranty

  • Kakeru Koumuten Co., Ltd. Workmanship Warranty: 10 to 15 years
  • Manufacturer Warranty: 30 years

*The duration of the workmanship warranty varies depending on the specifications of the ridge substrate and roofing sheet. Please check the warranty details for each product for eligibility and conditions.

Click here for examples of roofing work using Super Galtect

Roof Painting | Coating Warranty 1 to 8 Years

The warranty period for roof painting varies depending on the paint used. Examples of warranties for fading, peeling, and blistering are as follows.

Paint Warranty Period
Fine Perfect Best 3 years
Super Shanet Thermo Silicone 3 years
Super Shanet Thermo Fluorine 5 years
Inorganic Hybrid Coat 8 years

Click here for roof painting case studies

Rain Gutter Replacement | 5-Year Warranty

We provide a 5-year warranty for rain gutter replacement work.

Solar Panel Installation | 10-Year Warranty

The warranty period for solar panel installation work is 10 years.

*Depending on the condition of the existing roof, a roof renovation may be necessary to provide a warranty.

Interior Renovations Also Come with a Warranty!

At Kakeru Koumuten Co., Ltd., we offer warranties for interior renovations, covering everything from finishing materials to substrates, water areas, and equipment.

Here, we introduce an example of the warranty period and applicable phenomena. Detailed warranty information will be explained by your representative.

The warranty period for interior renovations ranges from 3 to 5 years, depending on the type of work.
Below are examples of symptoms covered by the warranty. Please check the warranty details for each work for actual applicability and conditions.

① Finishing Materials such as Building Materials and Wallpaper | 3 to 5-Year Warranty

This warranty covers finishing materials for walls, ceilings, and flooring in interior spaces.

Examples of phenomena covered by the warranty

  • Peeling of wallpaper
  • Peeling or cracking of flooring
  • Deformation or sagging of finishing materials

Cost and procedure for wallpaper replacement work can be found here

② Substrate for ceilings, floors, and walls | 5-year warranty

This warranty covers the substrate that supports the finishing materials, such as ceilings, floors, and walls.

Examples of phenomena covered by the warranty

  • Warping of the substrate
  • Deformation of the substrate, etc.

③ Water-related areas such as kitchens, vanities, toilets, and bathrooms | 3 to 5-year warranty

Renovations in water-related areas such as kitchens, vanities, toilets, and bathrooms also come with a warranty.

Examples of phenomena covered by the warranty

  • Water leaks, etc.

The warranty period and content vary depending on the type of work and the installation location. Please also check the warranty documents for the manufacturer’s warranty on the equipment itself.

④ Underfloor and termite prevention work | 5-year warranty

We offer a 5-year warranty for underfloor and termite prevention work.

Examples of coverage

  • Damage or harm caused by termites

Please confirm the applicable work scope and detailed warranty content with your representative.

⑤ Equipment-related work | 3 to 5-year warranty

We also provide warranties for work related to equipment such as water heaters, intercoms, and air conditioners.

Examples of coverage

  • Water leaks
  • Installation defects
  • Piping or wiring defects

※ The product warranty for the equipment itself and the warranty for installation, piping, and wiring may have different coverage and conditions. For details, please check the warranty content for each work and the manufacturer’s warranty documents.

Air conditioner replacement work menu can be found here

⑥ Annual after-maintenance support

After-maintenance can be utilized every year.

Kakeru Koumuten Co., Ltd. sends out annual after-maintenance notifications via DM. If you have any concerns after the work is completed, please feel free to mention them during the inspection.

After-maintenance achievements can be found here

Things to confirm regarding warranty content

This page introduces examples of warranty periods and symptoms covered for each type of work.

  • The warranty period, coverage, and applicable conditions vary depending on the work content, materials used, and installation locations.
  • The workmanship warranty and manufacturer warranty cover different aspects.
  • For specific warranty content, please check the warranty documents and contract details for each work.

If you find any issues after the construction or are unsure if they are covered by the warranty, please consult Kakeru Koumuten Co., Ltd. first.

No upfront or interim payments required!

About payment for construction costs

Kakeru Koumuten Co., Ltd. accepts construction work with 0 yen upfront or interim payments.

After the completion of the work, you can check the finish, warranty, and construction photos, and only after you are satisfied, you will make the payment for the construction costs.

Various Payment Methods

Payment method information

Cash Payment

We will visit you for collection and issue a receipt at the time of payment.

Bank Transfer

Please confirm the invoice and make the transfer. If you would like a receipt, please let us know. It will be issued after confirming your payment.

Renovation Loan

We have a business partnership with AEON Product Finance. If you wish to use a renovation loan, please consult us before signing the contract.

There is a screening process for use, and the construction will take place after passing the screening. Please check the interest rates and payment conditions at the time of application.

Kakeru Koumuten Co., Ltd.’s Aftercare

You can check the construction details with photos

Information on construction photos
Construction photos to check the work done

After the completion of the work, we provide photos before and after the construction, as well as photos of each stage of the process.

You can also check what kind of work was done in areas that will be hidden once completed.

Post-Construction Inspection and Maintenance

It is important to inspect the areas where work was done, such as the roof and exterior walls, after construction. We will check the condition of places that are usually hard to see and provide necessary maintenance guidance.

Inspection and repair case of roof sealing areas
After maintenance case of the roof

For the sealing areas of the roof, we provide free repairs during after maintenance. For details on the areas covered, please consult your representative.

If you have any concerns regarding interior or water-related work, such as symptoms with wallpaper, flooring, or equipment, please feel free to let us know.

View after maintenance achievements

To ensure you can live comfortably even after construction

Kakeru Koumuten Co., Ltd. aims to be a local construction company where you can consult about your home even after the work is completed.

If you have any questions regarding warranties or maintenance, please do not hesitate to ask. We will respond quickly and sincerely to any issues that may arise.

From roof and exterior renovations to interior, water-related, and equipment work, trust Kakeru Koumuten Co., Ltd. in Aoba Ward, Yokohama City!

Consultation regarding renovations and warranties

Estimates and inspections are free of charge.
Please feel free to share your desired work or any concerns you may have.

Free estimate and inquiries

Here for construction menu and price list

Here for our SNS like LINE and Instagram

For roof, gutter and exterior construction and repairs in Kanagawa,
contact Kakeru Koumuten Co., Ltd.

Kakeru Koumuten is a young company whose team is, on average, in their late twenties, but our skills are second to none.

Our greatest strength is that we handle scaffolding, roofing and painting entirely in-house. In an industry where these tasks are usually divided among contractors, our complete service simplifies project management and helps keep costs down. Above all, if a problem arises, we respond promptly.

We proudly describe ourselves as the youngest and most helpful renovation company in Kanagawa!