Hello!
We are Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior wall painting, and exterior renovations located in Aoba-ku, Yokohama, Kanagawa Prefecture!
This is a case study of an exterior renovation project in Nishi-ku, Yokohama.
The roofing renovation we performed this time is a roof overlay (cover method)!
We applied the cover method from slate roofing to Diplomat Star!
On this page, we will explain the actual results of the work done by Kakeru Koumuten!
Thank you very much for choosing Kakeru Koumuten Co., Ltd. from among many contractors.
Roof Renovation Project Data in Nishi-ku, Yokohama
| Construction Location |
| Aoba-ku, Yokohama |
| Construction Details |
| Temporary Scaffolding Installation Roof Overlay (Cover Method) |
| Inquiry Details |
|
A customer living in Nishi-ku, Yokohama, contacted us stating that they were advised by their house manufacturer to consider a roof overlay (cover method) during a regular inspection. Due to the high cost, they wanted to compare estimates from several companies. |
| Existing Base / Materials Used |
| Materials used for the roof overlay (cover method): Diplomat Star |
| Price Range |
| 500,000 to 1,000,000 yen |
| Construction Period |
| 2 weeks |
| Completion Month |
| March 2024 |
Roof Renovation Construction Procedure
1. Dismantling of Existing Roof Ridge Flashing
We will dismantle unnecessary parts (ridge cap and snow guards) for the
2. Installing Roofing (Waterproof Sheet)
Next, we will lay down the roofing sheet (waterproof sheet)! The roofing used is Tajima Roofing/New Liner Roofing!
This underlayment boasts the highest quality, unmatched in waterproofing and durability. By sandwiching the modified asphalt layer between non-woven fabric and base paper, it fully demonstrates the performance of the modified asphalt.
The expected durability is about 30 years![/chat]
3. Fabrication of Accessories (Kera and Karakusa)
Before the main roof construction, we will fabricate and install accessories such as kera and karakusa metal!
This time, since it will be a “same material accessory specification”, we will also process the waste kera and dedicated ridge base. [/chat]
4. Main Construction (D’s Roofing/Diplomat Star)
After the accessory fabrication, we will install the Diplomat Star roofing up to the ridge!
This time, since it will be a “same material accessory specification,” the ridge base will be made of Galvalume steel plate!
The durability of the Galvalume steel batten is about 30 to 35 years, making it highly durable and unlike resin or cedar, it won’t crack, so it is recommended![/chat]
5. Ridge Cap and Sealing at Various Locations
For the wall edge, we will process and install a component called rain stop metal.
We will use screws that are made of stainless steel, which is resistant to rust!
We will also use screws with packing to enhance waterproofing!
6. Cleaning
About the roofing material used this time
The roofing material used is the Diplomat Star from Deez Roofing.
Deez Roofing comes with a 30-year warranty on the base material.
Our company also provides a 10-year construction warranty!
It is made from zinc-aluminum steel plate, which has the same composition as galvanized steel that is resistant to rust.
Deez Roofing reduces the thermal conductivity to the steel plate layer due to the effect of the surface stone granules. This structure makes it harder for heat to transfer to the attic compared to other roofing materials, as it secures a sufficient air layer between the roofing material and the roof substrate.
Additionally, the unevenness of the surface stone granules has the effect of dispersing raindrops, causing them to hit with less force compared to a regular smooth surface. As a result, the high-frequency noise caused by the micro-vibrations of the steel plate when raindrops hit, which is the cause of the “noisy sound” of steel roofs, can be suppressed by the natural stone granule layer on the surface.
By adopting the “interlocking method” that integrates the roofing materials, it has excellent performance that can withstand winds of up to 60m/s, as well as superior fire resistance and waterproofing.
Colors
■ Onyx
■ Cafe
■ Terracotta
■ Evergreen
You can choose from 4 colors!
This time, we completed a roof overlay project at a café, and it turned out exceptionally well!
The customer was very satisfied, and I was also very happy!
Thank you very much!
Please check out other roofing project results here!
What is the Roof Overlay Method?
The roof overlay method involves leaving the current roof almost as it is and placing a new roof on top of it, effectively covering it.
Literally, it is a method of covering a roof with another roof. Therefore, the roof becomes double-layered. Since we overlap the roofing, it is also referred to as “overlapping roofing.”
Advantages of the Overlay Method
Since we place a “new roof” over the “current roof,” demolition work is almost unnecessary, meaning that very little waste material is generated.
This is the biggest feature and leads to various advantages.
The only parts that require demolition and waste disposal are the ridge cap, making it more cost-effective compared to complete re-roofing.
In 2004, regulations regarding the concentration of asbestos in raw materials were changed (please refer to the Ministry of Health, Labour and Welfare’s website for details).
Some building materials used in structures built before 2004 contain asbestos. Asbestos-containing materials are difficult to dismantle due to their high environmental impact, and the costs for demolition and waste disposal are also high. The overlay method, which generates almost no waste, is ideal for such roofs.
You may be wondering, “Is it safe to live in a building that uses asbestos-containing materials?” Rest assured. As long as there is no destruction or crushing, it will not disperse into the air.
If you are unsure about the type of roof on your home, please feel free to consult with us.
Additionally, the construction can be completed in a shorter time frame compared to painting or complete re-roofing. A shorter construction period means lower labor costs, which in turn makes the overall cost lower.
This also reduces the psychological anxiety of having to live in an unusual environment.
When scaffolding is set up, there may be inconveniences such as difficulty entering and exiting or opening windows. Being able to return to normal life in a short period is a significant advantage.
Our company specializes in roofing work, and the roof overlay method is the most frequently performed type of work we undertake. We are very grateful that we have been continuously engaged in roof overlay projects without interruption.
The Importance and Methods of Roof Repair
◇Types of Roofs and Their Characteristics
There are various types of roofs, each with its own characteristics, advantages, and disadvantages.
For example, “slate roofs” come in both decorative slate and natural slate, and their appeal lies in low cost and diverse designs. However, considerations regarding fragility and maintenance needs must be taken into account.
“Galvalume steel roofs (metal roofs)” excel in durability, lightweight, and earthquake resistance. “Ceramic tiles” are characterized by traditional beauty and durability, making them a suitable choice for Japan’s climate.
Selecting the appropriate roofing material contributes to preventing leaks throughout the house. Let’s choose roofing materials that suit your home while also considering expert opinions.
◇Steps and Precautions for Roof Repair
First, the steps for roof repair are as follows.
- Situation Confirmation: A specialist will thoroughly check the current condition of the roof and identify the extent of the damage and the cause of any leaks.
- Repair Plan Development: Based on the findings, we will propose necessary repair methods, processes, and costs.
- Construction: We will carry out the construction based on the repair plan. After completion, we will check again for any leaks.
Points to note include the following.
- Accurately understand the type of roofing material and choose the appropriate repair method.
- If the damage to the roof progresses, repair costs can become high, so prompt action is necessary.
- DIY repairs can be dangerous, so it is advisable to hire a professional.
It is important to carry out roof repairs with an understanding of the procedures and precautions.
| Roofing Material |
|
|---|---|
| Manufacturer Warranty | 30-Year Warranty |
| Expected Durability | About 45 Years |
| Color Used This Time |
Café |
Leave Your Roof Renovation in Nishi-ku, Yokohama to Kakeru Koumuten!
Our company has extensive experience in roof renovations in Nishi-ku, Yokohama.
We are happy to assist with partial roof repairs such as roof overlay work, roof replacement work, and leak repairs.
If you have any questions or concerns, such as “I just want to know the estimate for roof renovation” or “I want to know about roofing materials,” please feel free to contact us!
Community-Focused Service
We are an exterior renovation company located in Aoba-ku, Yokohama, and we receive many inquiries and requests from Nishi-ku, Yokohama as well.
In case of sudden roof leaks or repairs needed due to typhoons and wind damage, we can respond quickly!
Summary
These are our roofing renovation achievements in Nishi-ku, Yokohama!
This time, we used the roof overlay (cover method) for a steep roof!
For steep roofs, we recommend ensuring longevity with a single renovation since scaffolding is required.
Partial repairs for steep roofs also necessitate scaffolding, so it is essential to choose roofing materials with high wind resistance that can withstand strong winds from typhoons.
Our company will provide proposals tailored to your needs, considering location, structure, and future life plans!
Estimates and inspections are, of course, free! If you have any concerns regarding roofs, rain gutters, exterior walls, or exteriors, please consult Kakeru Koumuten Co., Ltd. in Aoba-ku, Yokohama!
Kakeru Koumuten is a renovation company strong in exterior renovations, and we perform complete in-house construction from temporary scaffolding to roofing and exterior painting.
We are confident that our “cost, quality, and efficiency” in exterior renovation work are unmatched compared to other companies!
We are confident in our exterior renovations, so we welcome competitive estimates!
We offer comprehensive construction guarantees and aftercare maintenance, providing excellent cost performance and appropriate proposals that align with our customers’ future life plans!
“I’m glad I asked them!” We take every request seriously to ensure you feel this way.
We also have information on roofing costs and pricing plans for the roof overlay (cover method), so please take a look if you’re interested!
We look forward to your inquiries. Thank you very much.
Helpful information about exterior renovations can be found here!
・Nishi Ward, Yokohama | Roofing | We performed a roof replacement with Ridgeway!
・Nishi Ward, Yokohama | Roofing | We performed a roof overlay with Super Galtect!
・Nishi Ward, Yokohama | Roof Repair | We replaced the ridge cap and eaves gutter!
・DIY Painting Plan! A must-see for those who want to try painting the roof and exterior walls themselves! We will only set up the scaffolding!
・What are the average costs for roof remodeling? Types of work and how to choose a contractor.
・Latest! Subsidies and grants available for renovations, and reduction systems!
・How much does roofing work cost? We will introduce the average costs!
・Exterior wall cleaning plan that does not require temporary scaffolding!
・Renovation Store in Kanagawa Prefecture, Yokohama | What is Roof Overlay (Roof Cover Method)?
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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!
