Hello!
This is Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior wall painting, and exterior renovations located in Aoba-ku, Yokohama, Kanagawa Prefecture!
Here is a case study of exterior renovations in Setagaya-ku, Tokyo.
The work this time involves a roof overlay (cover method) using Diplomat Star!
We performed a cover method from a slate roof to Diplomat Star!
On this page, we will explain the actual achievements carried out by Kakeru Koumuten!
Thank you very much for choosing Kakeru Koumuten Co., Ltd. from among many contractors.
Construction Data for Setagaya-ku, Tokyo
| Construction Location |
| Setagaya-ku, Tokyo |
| Construction Details |
| Installation of temporary scaffolding Roof overlay (cover method) |
| Background to the Construction |
|
・Inquiry Details ・Proposal Details After obtaining estimates from four companies, you entrusted the construction to us with our Diplomat Star plan! |
| New Materials Used |
| Roof: Diplomat Star |
| Price Range |
| 600,000〜700,000 |
| Construction Period |
| About 1 week |
| Completion Month |
| October 2024 |
Roof Construction (Roof Overlay) Procedure
1. Dismantling Existing Roof Ridge Flashing
We will dismantle unnecessary parts (ridge flashing and snow stops) for the
2. Installing Roofing (Waterproof Sheet)
This underlayment boasts the highest quality, unmatched in both waterproofing and durability. By sandwiching a modified asphalt layer between non-woven fabric and base paper, it fully demonstrates the inherent performance of modified asphalt.
The expected durability is about 30 years!
3. Fabrication of Accessories (Karakusa and Keraba)
This time, since it will be a “Uniform Accessory Specification”, we will also process the waste keraba and dedicated ridge base.
4. Main Construction (D’s Roofing/Diplomat Star)
This time, since it will be a “Uniform 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 does not crack, making it highly recommended!
Our original integrated waste board made of Galvalume steel plate for the ridge base is highly durable with strong fixation and excellent wind resistance! Even if rainwater enters from the ridge, it has a mechanism to discharge rainwater to the outside, thus demonstrating high waterproofing performance!
5. Ridge Flashing and Sealing at Various Locations
For the wall edge, we will process and install a component called rain stop metal.
The screws used for fixing are made of rust-resistant stainless steel with waterproof washers!
Unlike nails, screws with washers are less likely to come loose and securely fix the ridge metal to the purlin!
Although it is not visible after construction, installing a face plate on the inside of the ridge metal enhances waterproofing!
It firmly protects the ridge, which is a critical point of the roof.
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 uses zinc-aluminum steel, which has the same composition as rust-resistant Galvalume steel.
Deez Roofing has a low thermal conductivity value 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 ensures a sufficient air layer between the roofing material and the roof substrate.
Additionally, the unevenness of the surface stone granules disperses raindrops, causing them to hit the surface smaller than they would on 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 also 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 60m/s, as well as outstanding fire resistance and waterproofing.
Color
■Onyx
■Cafe
■Terracotta
■Evergreen
You can choose from these 4 colors!
This time, the cover work was done with Terracotta, and it turned out very well!
The customer was very satisfied, and I was also very happy!
Thank you very much!
Please check out other roofing work examples from here!
What is the Roof Overlay (Cover 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 the roof is layered, it is also referred to as “layered roofing.”
Advantages of the Overlay Method
Since a “new roof” is placed over the “current roof,” demolition work is almost unnecessary, meaning that very little waste is generated.
This is its most significant feature, leading to various advantages.
The only part that requires demolition and waste disposal is the ridge cap, so compared to complete roof replacement, the cost is lower.
In 2004, regulations regarding the concentration of asbestos in raw materials were changed (for more details, please refer to the Ministry of Health, Labour and Welfare website).
Building materials used in structures constructed before 2004 may contain asbestos. Asbestos-containing materials are challenging 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.
Some of you may wonder, “Is it safe to live in a building that uses asbestos-containing materials?” but 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 us.
Additionally, we can complete the work in a shorter period than painting or re-roofing. A shorter construction period means lower labor costs, which in turn makes the expenses more affordable.
The psychological anxiety of having to live in an unusual environment is also reduced.
When scaffolding is set up, there may be inconveniences such as difficulty entering and exiting or windows being hard to open. Being able to return to normal life in a short period is certainly a significant advantage.
Our company specializes in roofing work, but roof overlay (cover method) projects are the most frequently executed jobs we handle. We are very grateful that we have been continuously engaged in roof overlay (cover method) projects without interruption.
| Roof Material |
|
|---|---|
| Manufacturer Warranty | 30-Year Warranty |
| Expected Durability | Approximately 45 Years |
| Color Used This Time |
Terracotta |
For Roofing Work in Setagaya-ku, Tokyo, Trust Kakeru Koumuten!
Our company is based in Aoba-ku, Yokohama, and we have handled numerous exterior wall and roof repairs in nearby Setagaya-ku, Tokyo.
We are happy to assist with partial repairs such as exterior wall painting, roofing work, waterproofing, and other projects.
“I just want to know the estimate for now” or “I want to know about the paint suitable for my home”—if you have any questions or concerns, please feel free to contact us!
Summary
This concludes our track record of roof overlay (cover method) projects in Setagaya-ku, Tokyo.
In roof overlay (cover method) projects, not only the roofing material but also “roofing sheets” and “ridge base materials” are important auxiliary materials.
It is essential to check what kind of roofing sheets are used and whether they are compatible with existing roofing materials or new roofing materials before making a decision.
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 Co., Ltd. is a remodeling company strong in exterior renovations, and we carry out everything from temporary scaffolding work to roof work and exterior painting completely in-house.
When it comes to exterior renovation work, we are confident that we will not be outdone by other companies in terms of “cost, quality, and efficiency”!
We are confident in our exterior renovations, so we welcome competitive estimates!
We also offer comprehensive construction guarantees and aftercare maintenance, and we have received positive feedback for our cost performance and appropriate proposals that align with our customers’ future life plans!
We want you to think, “I’m glad I asked them!” Therefore, we take every request seriously and work diligently on it.
We look forward to your inquiries. Thank you very much.
Helpful information about exterior renovations can be found here!
・Exterior wall cleaning plan that does not require temporary scaffolding!
・DIY painting plan! Perfect for those who want to try painting their roof and exterior walls themselves! We will only set up the scaffolding!
・About the costs of roof overlay | Kakeru Koumuten’s roofing plan!
・About the costs of exterior painting | Kakeru Koumuten’s exterior painting plan!
・About the costs of leak repairs | Kakeru Koumuten’s leak repair plan!
・About the costs of ridge cap replacement and surface plaster | Kakeru Koumuten’s construction plan!
・Latest information on subsidies and reduction systems available for renovations!
・What is a kasagi? Detailed explanation of the role and repair methods of kasagi!
・Renovation store in Yokohama, Kanagawa Prefecture | What is roof overlay (roof cover method)?
・[Setagaya-ku, Tokyo] | Foundation repair | We performed basic mortar repair and foundation painting!
・[Setagaya-ku, Tokyo] Leak repair | We carried out roof cover work and skylight removal!
・【Setagaya-ku, Tokyo】｜We have completed the roof replacement from tile roofing to Super Galtect!
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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!
