目次
- 1 If you are looking for a skylight contractor in Musashimurayama, Tokyo,Kakeru Koumuten is here for you
- 2 Reasons why Kakeru Koumuten is chosen for skylight work in Musashimurayama, Tokyo
- 3 Possible subsidies and grants for skylight construction in Musashimurayama City, Tokyo
- 4 Skylight Repair and Replacement Price List
- 5 Customer Feedback
- 6 Advantages and Disadvantages of Skylights
- 7 Examples of Skylight Repair Work
- 8 Skylight Glass Replacement Work – Construction Procedure
- 9 How to Choose a Skylight Contractor
- 10 If you are looking for a skylight replacement contractor in Musashimurayama City, Tokyo, please contact Kakeru Koumuten Co., Ltd.
If you are looking for a
skylight contractor
in Musashimurayama, Tokyo,Kakeru Koumuten is here for you
Kakeru Koumuten is an exterior renovation company that performs
complete in-house construction from temporary site setup to roof work and skylight installation.
We have received numerous requests for skylight repairs and replacements in Musashimurayama, Tokyo.
We respond quickly to urgent skylight repairs, such as leaks from skylights (top lights),
and provide emergency measures as needed.
“About subsidies available for skylight work in Musashimurayama, Tokyo”
“About the costs of skylight repairs and replacements”
“Reasons why Kakeru Koumuten is chosen in Musashimurayama, Tokyo”
For customers living in Musashimurayama, Tokyo, who are considering skylight replacements,
this information will definitely be helpful, so please take a look!
To conclude, the most important thing when considering skylight work is
“multiple estimates”!
Let’s obtain estimates from at least three skylight repair contractors
within the Musashimurayama, Tokyo area!
Reasons why Kakeru Koumuten is chosen for skylight work in Musashimurayama, Tokyo

The reasons why we can be entrusted with skylight repairs in Musashimurayama, Tokyo,
include the fact that “Kakeru Koumuten is a roofing company in Tokyo,”
but also our“unique approach to skylight replacement work that cannot be imitated by other companies”
, which has received high praise from many customers.
“cost, quality, and plans” are our absolute strengths,
1. Facilities Specialized in Exterior Renovation
Kakeru Koumuten Co., Ltd. has prepared the following warehouses and material storage areas to provide low-cost, high-quality exterior renovations such as skylight installation.
We have established 5 bases centered around Yokohama City for material storage and showrooms.
In-House Scaffolding Materials
We own the scaffolding materials necessary for temporary scaffolding required for skylight installation, allowing us to assemble scaffolding in-house.
By performing scaffolding work with our own scaffolding team instead of outsourcing, we can cut costs on scaffolding work and respond quickly in emergencies.
We have scaffolding materials for approximately 50 single-family homes!
Storage of Materials in Our Large In-House Warehouse
We store materials used for exterior renovations.
By ordering a large quantity of materials at once, we can purchase materials at a lower cost!
Additionally, we always have stock available, allowing us to respond quickly in emergencies!
In-house Waste Separation
During skylight construction, various waste materials such as roofing materials, glass, and wood are generated.
While most contractors dispose of them all together, by separating and recycling waste materials, we can significantly cut down on waste disposal costs.
Showroom Dedicated to Exterior Renovations
In our showroom, not only can you have meetings,
but you can also directly check the actual roofing materials and colors.
You can also perform color simulations for exterior painting and check heat insulation properties using a heat insulation testing machine!
2. Complete In-House Construction for Skylight Installation
One of Kakeru Koumuten’s major strengths is our complete in-house construction.
From inquiry to project completion, everything is handled by Kakeru Koumuten in a consistent manner, allowing us to keep costs down while providing high-quality skylight installations.
Additionally, one representative will handle everything from the estimate to project completion.
Since the person in charge does not change, whether it’s sales or construction management, smooth communication is possible.
We can handle everything from the installation of temporary scaffolding to exterior painting, roofing work, and exterior cover work completely in-house!
Skylight installation involves dismantling or removing roofing materials, so by carrying it out simultaneously with roof replacement or cover work, you can significantly reduce costs!
3. Various Permits Obtained & Skilled Workers on Staff
We have obtained permits for construction work and industrial waste collection and transportation!
We have national certified sheet metal workers and painting technicians on staff, and we are confident in our construction techniques.
We are also capable of handling large-scale roofing projects such as those for factories!
We have qualified asbestos supervisors and asbestos surveyors on staff, so we can handle asbestos-containing roofing materials and conduct preliminary surveys.
4. Warranty and Aftercare
The skylight replacement work comes with a warranty! Aftercare is available every year, and we send out notification DM each year.
5. Flexible and Prompt Response
Our company is equipped to handle various troubles and situations related to skylights.
Even if you cannot access the roof at high altitudes, we can utilize drones to assist you!
During leak investigations, we can also conduct surveys using a thermal imaging camera, which helps in identifying the cause of leaks!
We will respond according to your wishes.
We also accept emergency repairs for sudden leaks from skylights!
6. Human Resource Development
We are creating various roof models to improve our skills and conducting practical training.
Since different sites require various processing and techniques, we regularly provide skill enhancement education to ensure all staff can respond appropriately.
Possible subsidies and grants for skylight construction in Musashimurayama City, Tokyo
In Musashimurayama City, Tokyo, there are potential subsidies available when carrying out skylight construction!
For details, please contact our company or your local government!
Heat-resistant coating and insulation construction subsidies
Eligible Persons
- Residents living in homes within Musashimurayama City
- Homeowners or residents
- No delinquency on city taxes (general requirement)
Requirements
- Pre-application required (before contract)
- Contract and construction must occur after the city’s grant decision
- Applications will close when the budget is reached (first-come, first-served)
- There is a deadline for project completion (e.g., by the end of February)
Eligible Construction
- Heat-resistant coating construction
- Insulation construction (exterior walls, ceilings, floors, windows, etc.)
Subsidy Rate and Maximum Amount
| Construction | Local Contractors |
|---|---|
| Heat-Reflective Coating | 1/2 of construction cost (up to 50,000 yen) |
| Insulation Work | 1/2 of construction cost (up to 50,000 yen) |
Child-Rearing Green Housing Support Project
Eligible Participants
Households with children (households with children under 18) and young couples are eligible for new construction or purchase of energy-efficient homes, or energy-saving renovations of existing homes. For new construction, the builder or buyer is eligible, while for renovations, the contractor who orders the work is eligible for assistance.
Requirements
For new homes, it is necessary to meet high energy efficiency standards set by the government, such as above ZEH levels. For renovations, the work must improve the energy efficiency of the home through insulation upgrades or the introduction of energy-saving equipment. In both cases, it is required to contract with a registered business and carry out the work within the specified period.
Maximum Subsidy Amount
For new constructions, the maximum subsidy per unit is between 400,000 yen and 1,600,000 yen, depending on the performance category of the housing. For renovations, the maximum subsidy per unit is between 400,000 yen and 600,000 yen, depending on the content of the work. In either case, even if multiple works are carried out, the subsidy cannot exceed these maximum amounts.
Subsidy Rate
This program does not provide a subsidy based on a certain percentage of the construction costs; instead, it offers a predetermined “fixed subsidy” based on the content of the work and performance category. Therefore, in effect, the government covers part of the construction costs.
For more details, please click here!
Advanced Window Renovation Project
Eligible Participants
Homeowners of existing houses (single-family homes and apartment buildings) who are conducting insulation renovation work on windows and openings are eligible. The actual subsidy application process is carried out by registered “window renovation contractors” recognized by the government, and the granted subsidies are fully refunded to the homeowners through discounts on construction costs.
Requirements
Eligible renovations include the installation of interior windows, replacement of exterior windows, and glass replacement aimed at improving insulation performance in existing homes. It is necessary to use products that meet the insulation performance standards set by the government and to enter into a construction contract with a registered window renovation contractor. Additionally, the total subsidy amount must be 50,000 yen or more, and the work must start and be completed within the specified construction period.
Maximum Subsidy Amount
The maximum subsidy is 2,000,000 yen per unit. Even if multiple windows are renovated, the total subsidy that can be received for the same house is limited to this maximum amount.
Subsidy Rate
The subsidy rate is approximately equivalent to half of the construction costs. The actual subsidy amount is set at a fixed rate based on the type of window (interior window, exterior window, glass), size, and insulation performance category, resulting in a total that is approximately 50% of the construction costs.
For more details, please click here!
Skylight Repair and Replacement Price List
This is the warranty and cost for each method of skylight repair!
(Using products from Velux Japan)
(Varies by method)
(Varies by method)
(Varies by method)
(Sealing and Waterproof Tape)
(Varies by method)
(Varies by method)
(Varies by method)
(Varies by method)
(Varies by method)
※Costs and guarantee periods vary based on shape, quantity, condition of the substrate, whether it is a roof overlay or complete replacement, type of existing roofing material, and type of materials used.
If you would like a detailed estimate, please feel free to contact us!
Estimates are completely free of charge.
For information on the costs of Kakeru Koumuten’s skylight repair and replacement plans, click here!
Customer Feedback
Advantages and Disadvantages of Skylights
Advantages of Skylights
High Light Transmission

First, the advantage of skylights is their high light transmission.
When natural light floods into the room, it creates a sense of openness, making it feel pleasant.
Energy Savings

This is also linked to high light transmission, as having natural light allows for savings on electricity bills. It reduces the need to turn on lights during the day, making it energy-efficient.
Good Ventilation

By installing a skylight, you can open and close it, which improves ventilation.
Warm air rises, enhancing airflow as well.
High Privacy

In areas with closely built houses, large windows can expose the interior of your home. However, with skylights, since they are installed on the roof, your privacy is maintained.
Disadvantages of Skylights
Risk of Leaks

The biggest concern when installing a skylight is the risk of leaks. Since it involves opening up the roof for installation, there is always some risk of water leakage.
However, with proper installation and regular maintenance, the risk can be minimized significantly.
Regular Maintenance Required

Skylights need maintenance every 5 to 10 years to prevent leaks. While maintenance may seem bothersome, it is recommended to do it regularly to avoid damage to the interior and wooden parts caused by leaks.
Noise from Rain

Since skylights are installed directly on the roof, the sound of raindrops hitting the glass can easily be transmitted indoors. This can be particularly noticeable during heavy rain or storms.
However, this is not strongly felt with all skylights. By choosing double-glazed glass or products with high sound insulation, the sound of rain can be reduced.
Examples of Skylight Repair Work
| Construction Details |
| Skylight Glass Replacement Work |
| New Materials Used |
| Double Glazing |
| Price Range |
| 50,000 – 100,000 yen |
| Construction Period |
| 1 Day |
| Background to the Construction |
| Cracks had developed in the skylight glass, so we received a request to replace the skylight glass along with the roof overlay work. |
Skylight Glass Replacement Work – Construction Procedure
1. Remove the components around the skylight
First, we will remove the cover materials and securing materials around the skylight. These materials will be reused, so we will take them off carefully.
2. Protection
We will protect the area around the skylight indoors.
This is to ensure that no debris falls inside.
3. Removal of Existing Glass
Next, after removing the cover materials, we will take out the existing glass.
4. Installation of New Glass
Once the existing glass is removed, we will install the new glass. We will be careful to ensure that the glass does not break during installation, just as we were during removal.
5. Waterproofing Treatment
When replacing the skylight glass, waterproofing treatment may be necessary.
We will perform waterproofing around the glass using butyl tape and other materials.
6. Restoration of Materials and Sealing
We will reattach the covers and fasteners that held the glass in place.
It is important to ensure that the installation method matches the type of skylight being used, as improper installation can lead to leaks. We will check that the fittings are securely fastened.
Waterproofing treatment will be done around the frame with sealing.
How to Choose a Skylight Contractor
There are many skylight contractors in Musashimurayama City, and you may be unsure which one to choose.
Therefore, when requesting skylight replacement work or leak repairs, please check the following 5 points.
● Extensive experience in skylight work
● Check if they can also handle roofing work
● Confirm the presence of warranties and aftercare services
● Obtain estimates from multiple contractors (at least 3)
● Check if they perform roof renovations in-house
By confirming the above 5 points, you will be able to choose a reliable contractor.
Extensive Experience in Skylight Work
Skylight contractors often have websites where they showcase their work experience.
Additionally, if they provide detailed explanations of repair work with photos, it can give you peace of mind as a reference when you request repairs.
If you are concerned about whether the contractor you are about to hire will respond adequately, choose one with extensive repair experience.
It is also effective to look at reviews of skylight contractors on Google and review sites!
If there are many negative reviews or no reviews at all, it may be wise to refrain from requesting their services.
Kakeru Koumuten Co., Ltd. specializes in exterior work, so we receive many requests for skylight replacement work.
Check if They Can Handle Roofing Work
Since skylights are installed on roofs, roofing work is often involved.
If the contractor lacks knowledge about roofs or cannot handle roofing work, it may lead to leaks after installation or result in high construction costs, leading to potential troubles.
Moreover, since skylight replacement or removal may require partial dismantling of the roof and restoration, performing roof overlay work or re-roofing simultaneously can significantly reduce costs!
Our company specializes in roofing work, so we can propose the optimal plan tailored to your needs for roofing work associated with skylight installation.
Check for warranties and after-sales maintenance
When choosing a skylight contractor, let’s confirm the availability of warranties.
If a leak occurs after the skylight installation, having a leak warranty from the contractor ensures that repairs can be made at no cost, providing peace of mind!
Additionally, a company that offers a warranty is a sign of confidence in their work, making it a criterion for selecting a contractor!
Warranty periods vary by contractor and the nature of the work, but typically range from 1 to 10 years.
Emergency repairs or partial fixes often do not come with a leak warranty.
Moreover, some contractors offer after-sales services in addition to warranties, so be sure to check if the contractor you are considering has warranties andafter-sales services.
Kakeru Koumuten Co., Ltd. sends out annual DM for after-sales maintenance, allowing for yearly inspections.
We also provide free support for simple repairs such as partial sealing.
Obtain estimates from multiple contractors (at least 3 companies)
When requesting skylight installation, be sure to obtain estimates from multiple contractors.
Even for the same repair or replacement work, the costs can vary between contractors, as well as the warranties and after-sales services offered.
Additionally, obtaining multiple estimates makes it easier to negotiate prices.
To request your desired contractor at a lower price, it is essential to obtain estimates from multiple companies.
When comparing estimates, consider not only the cost but also
“Items in the estimate”
“Materials and quality of glass, etc.”
“Confirmation of the process”
and make a detailed comparison! If the quality of auxiliary materials is low or if steps are skipped, costs can be reduced, so avoid making decisions based solely on price!
Check if the work is done in-house
There are various construction methods for skylight repair plans, including full replacement, roof overlay (cover method), and partial repairs!
The plan details will vary depending on the actual state of deterioration and the customer’s wishes.
If you choose a contractor that completely subcontracts skylight repair work, they may lack knowledge and experience, leading to proposals for repairs in the wrong areas or unnecessary work.
Customers who want to keep costs down may be suggested costly projects like skylight replacement, even when partial repairs would suffice.
Additionally, requesting subcontractors after an investigation can lead to extra time and costs.
By having the knowledge and experience to perform the work in-house, we can provide responsible construction while keeping costs down.
Moreover, contractors that subcontract may have delayed responses during emergencies or issues after construction, which is one of the drawbacks.
If you are looking for a skylight replacement contractor in Musashimurayama City, Tokyo, please contact Kakeru Koumuten Co., Ltd.
Our company handles many roofing and exterior painting projects in Musashimurayama City, Tokyo. We are happy to assist with skylight replacements, roof overlays, roof replacements, exterior painting, exterior siding replacements, and partial roof repairs, as well as other repairs!
In urgent cases like water leakage, we can also provide emergency measures without scaffolding, so please feel free to consult with us!
Whether you want to “make it last with one renovation“, “keep costs as low as possible“, or “improve insulation because the indoors are hot“, we will provide the best solutions for your specific needs.
We carry out everything from temporary scaffolding work to roofing and exterior painting entirely in-house.
We are confident that we will not be outdone in terms of cost, quality, and planning compared to other companies!
We welcome competitive estimates with confidence!
Exterior Renovation Service Areas
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and all of Tokyo.
Musashimurayama City, Tokyo Area List
Inahira, Musashimurayama City / Enoki, Musashimurayama City / Ominami, Musashimurayama City / Gakuen, Musashimurayama City / Kishi, Musashimurayama City / Zambori, Musashimurayama City / Shinmei, Musashimurayama City / Chuo, Musashimurayama City / Nakato, Musashimurayama City / Nakahara, Musashimurayama City / Honcho, Musashimurayama City / Mitsuki, Musashimurayama City / Mitsufuji, Musashimurayama City / Midorigaoka, Musashimurayama City
・Trust Kakeru Koumuten Co., Ltd. for exterior wall painting in Musashimurayama, Tokyo!
・Trust Kakeru Koumuten Co., Ltd. for roof renovations in Musashimurayama, Tokyo!
・Trust Kakeru Koumuten Co., Ltd. for exterior renovations in Musashimurayama, Tokyo!
・Kakeru Koumuten Co., Ltd. project achievements
・Kakeru Koumuten Co., Ltd. aftercare services
・Kakeru Koumuten Co., Ltd. service menu and price list
・Kakeru Koumuten Co., Ltd. staff blog and announcements
・We explain the importance of getting multiple estimates and key comparison points!
・Trust Kakeru Koumuten Co., Ltd. for leak repairs in Musashimurayama, Tokyo!
We welcome inquiries via LINE◎
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!




