Hello!
I am Yamanaka from Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior painting, and exterior renovations located in Aoba-ku, Yokohama, Kanagawa Prefecture!
This is a case study of a roof renovation in Aoba-ku, Yokohama, Kanagawa Prefecture.
The work involved a roof overlay (cover method)!
We implemented leak prevention measures through the roof overlay!
We received this request from our long-time partner, D Construction Company!
Thank you very much for choosing Kakeru Koumuten Co., Ltd. from among many contractors.
目次
Roof Overlay (Cover Method) Construction Steps
1. Demolition of Existing Ridge and Snow Stops
We will only dismantle the ridge flashing and snow stops that would obstruct the overlay work.
2. Installation of Sheathing
We will process and attach the sheathing.
3. Underlayment Installation
4. Air Gap Sheet Installation
The air gap sheet is a ventilation and waterproof underlayment material specifically for metal roofs.
It enhances “insulation performance,” “condensation prevention and durability,” and “soundproofing performance.”
5. Custom Fabrication (Karakusa, Keraba, Valley)
We process and install keraba, karakusa, and valley metal sheets.
6. Main Construction
Once the main body is installed, we place the purlin at the ridge and wall edges. This time, we used cedar purlins, but there are also resin purlins that are resistant to corrosion.
7. Ridge Cap Fabrication
We process and install the ridge cap. We firmly apply sealing on the inside of the joints.
At the wall edges, we process and install a component called rain stop metal.
8. Cleaning
We remove footprints and debris that inevitably fall around the house and inside the rain gutters, and we do a thorough cleaning.
We strive to leave the site cleaner after the work than it was before!
That concludes our work!
The finished product pleased our customers!
The roofing material used this time is Nichiha Corporation’s Yokodan Roof αS.
Yokodan Roof αS comes with a manufacturer warranty of 15 years for the coating, 20 years for red rust, and 25 years for perforation.
It is a high-performance metal insulated roof made of metal steel plates (high-durability coated Galvalume steel plates), insulation (rigid polyurethane foam), and aluminum laminated backing material, all molded together.
It is lightweight and earthquake-resistant, demonstrating excellent insulation performance throughout the year, achieving long maintenance due to its high durability.
You can choose from four colors: K Black S, K Brown S, K Green S, and K Kinglo S.
The cover work with K Green S turned out exceptionally well!
Our customer was very satisfied, and I was also very happy!
Thank you very much!
What is the Roof Overlay Method?
The roof overlay method involves leaving the current roof almost intact and placing a new roof on top of it, effectively covering it.
As the name suggests, it is a method of covering a roof with another roof. Therefore, the roof becomes double-layered. Since the roof is installed in layers, it is also referred to as “layered roofing.”
Advantages of the Overlay Method
By placing a “new roof” 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 a complete roof replacement, the cost is lower.
In 2004, regulations regarding the concentration of asbestos in raw materials were changed (for details, please visit the Ministry of Health, Labour and Welfare’s website).
Some building materials used in structures built before 2004 contain asbestos. Asbestos-containing materials are difficult to demolish due to their high environmental impact, resulting in high costs for both demolition and waste disposal. The roof 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?” 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 with us.
Additionally, we can complete the work in a shorter time frame compared to painting or a full roof replacement. A shorter construction period means lower labor costs, which in turn makes the overall cost lower.
The psychological anxiety of having to live in an unusual environment is also reduced.
When scaffolding is erected, you may experience inconveniences such as difficulty entering and exiting or opening windows. Being able to return to your 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 service we provide. We are very grateful that we consistently have ongoing projects for roof overlay work.
Leave your roof renovation in Aoba-ku, Yokohama to Kakeru Koumuten Co., Ltd.!
Since our company is based in Aoba-ku, we have extensive experience in roof renovations in the area.
We are happy to assist with roof overlay work, roof replacements, leak repairs, and even partial roof repairs.
If you have any questions or concerns, such as “I just want to know the estimate for the roof renovation” or “I want to know about roofing materials,” please feel free to contact us!
Community-Focused Service
As a home exterior renovation company in Aoba-ku, Yokohama, we handle many roof renovations and have a deep understanding of the needs of local customers. Whether you want to “make it last long with a single renovation,” “keep costs down as much as possible,” or “improve insulation performance because the indoors are hot,” we provide optimal solutions for your specific requests.
Long-Term Reliability
All roofing materials we use come with reliable long-term warranties. For example, the Yokodana Roof αS used this time has a 15-year warranty for the coating, 20 years for red rust, and 25 years for perforation, allowing you to use it with peace of mind for a long time after a single renovation.
Conclusion
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 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 we receive seriously.
We also have information on roof construction costs and pricing plans for roof overlay (cover method), so please feel free to take a look!
We look forward to your inquiries. Thank you very much.
Helpful information about exterior renovations can be found here!
・Aoba-ku, Yokohama | We performed roof overlay (cover method) with Galtect and exterior painting work!
・Aoba-ku, Yokohama | We performed cover work with Colonial NEO ~ Super Galtect!
・Aoba-ku, Yokohama | We performed cover work with Urbani ~ Super Galtect!
・Painting DIY Plan! A must-see for those who want to try DIY roof and exterior wall painting! We will only set up the scaffolding!
・What is the cost range for roof remodeling? Types of work and how to choose a contractor
・Latest | Grants and subsidies available for remodeling, and reduction systems!
・How much does it cost for roof work? We will introduce the cost range!
・What is the cost range for rain gutter repair and cleaning? Tips on timing, fire insurance, and choosing a contractor!
・Remodeling store in Kanagawa Prefecture, Yokohama | What is roof layering (roof overlay 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!
