Hello!
I am Yamanaka from Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior painting, and exterior renovation located in Aoba-ku, Yokohama, Kanagawa Prefecture!
This is a case study of a roof renovation project in Minami-ku, Yokohama, Kanagawa Prefecture.
The work involved a roof overlay (cover method) (Super Galtect) project!
We implemented measures against leaks through the roof overlay!
Thank you very much for choosing Kakeru Koumuten Co., Ltd. from among many contractors.
Roof Overlay (Cover Method) Construction Procedure
1. Demolition of Existing Ridge and Snow Guards
We will only dismantle the ridge flashing and snow guards that may obstruct the overlay work.
2. Laying of Roofing (Waterproof Sheet)
The roofing material used this time is modified asphalt. It is expected to have double the durability of asphalt roofing!
3. Custom Fabrication (Karakusa and Keraba)
We will process and install the keraba and karakusa.
4. Main Construction
Once the main roofing is completed, we will install the purlins at the ridge and wall edges. This time, we used cedar purlins, but there are also resin purlins that are resistant to corrosion.
5. Ridge Cap Fabrication
We will process and install the ridge cap. We will firmly apply sealing on the inside of the joints.
At the wall edges, we will process and install a component called a rain stop metal.
6. Cleaning
The construction is complete!
The roofing material used is the Super Galtect from Aijii Industry.
The Super Galtect comes with a manufacturer warranty of 15 years for the coating and 25 years for perforation.
Our company also provides a 10-year construction warranty!
Made of galvalume steel, it is resistant to rust.
Insulation material is tightly applied from edge to edge of the roofing material, creating a metal sheet that integrates the steel plate and insulation.
When installed, insulation is applied even to the parts where the roofing materials overlap, and the surface is coated with a high heat-reflective paint, allowing for a cool summer and warm winter.
Additionally, it has soundproofing properties, reducing the sound of rain.
Being lighter than other roofing materials, it reduces the sway during earthquakes, making it a good earthquake countermeasure.
It excels in finish, durability, insulation, soundproofing, and wind resistance, and among our construction achievements, Aijii Industry’s Super Galtect is the most popular and highly regarded!
Color
■Shade Black
■Shade Brown
■Shade Blue
■Shade Moss Green
■Shade Charcoal
You can choose from these 5 colors!
This time, the cover work with Shade Black turned out exceptionally well!
Thank you for your request!!
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 laid over, it is also referred to as “overlapping 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 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 roof replacement.
In 2004, regulations regarding the concentration of asbestos in raw materials were changed (for details, please refer to 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 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 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 you have, please feel free to consult with us.
Additionally, we can complete the work in a shorter time frame compared to painting or re-roofing. A shorter construction period means lower labor costs, which in turn makes the expenses more affordable.
This also reduces the psychological anxiety of having to live in an environment that is different from usual.
When scaffolding is set up, there may be inconveniences such as difficulty in entering and exiting or trouble opening windows. Being able to return to normal life in a short period is certainly a significant advantage.
Our company specializes in exterior renovation work, and the roof overlay (cover method) is the most frequently performed service we offer. We are very grateful that we are continuously able to carry out roof overlay (cover method) projects without interruption.
Trust Kakeru Koumuten Co., Ltd. for Roof Renovations in Minami-ku, Yokohama!
Since our company is based in Yokohama, we have a wealth of experience in roof renovations in Minami-ku, Yokohama.
We are happy to assist with roof overlay work, roof re-roofing, and even partial roof repairs such as leak repairs.
If you have any questions or concerns, such as “I just want to know the estimate for a roof renovation” or “I want to know about roofing materials,” please feel free to contact us!
Community-Focused Service
As an exterior renovation company in Aoba-ku, Yokohama, we have handled many roof renovations within Yokohama and have a deep understanding of the needs of local customers.
“I want it to last a long time with just one renovation”
“I want to keep costs as low as possible”
“I want to improve insulation performance because the indoors are hot”
We provide optimal solutions for specific requests like these.
Long-Term Reliability
All roofing materials we use come with long-term warranties and are highly reliable products. For example, the Super Galtect we are using this time comes with a 15-year coating warranty and a 25-year hole warranty from the manufacturer. We also provide a 10-year construction warranty, allowing you to use it with peace of mind for a long time after just one renovation.
Galtect is a lightweight roofing material that excels in durability and cost performance, but we also offer roofing materials with even higher durability and better insulation properties.
Conclusion
We are happy to assist with roof overlay work, roof re-roofing, and even partial roof repairs such as leak repairs.
Estimates and inspections are, of course, free! If you have any concerns regarding roofs, rain gutters, exterior walls, or exterior structures, please consult Kakeru Koumuten Co., Ltd. in Aoba-ku, Yokohama!
Kakeru Koumuten Co., Ltd. is a renovation company strong in exterior renovations, and we carry out complete in-house construction from scaffolding to roofing and exterior painting.
We are confident that in terms of “cost, quality, and efficiency,” we do not fall behind compared to other companies!
We are confident in our exterior renovations, so we welcome competitive estimates!
With comprehensive construction warranties and aftercare maintenance, we have received positive feedback for our appropriate proposals that align with cost performance and our customers’ future life plans!
“I’m glad I asked them!” We take every request seriously to ensure you feel this way.
We have also published 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!
・Minami Ward, Yokohama | We removed the skylight and performed a roof overlay!
・Minami Ward, Yokohama | We performed a roof overlay using Super Gartets!
・Aoba-ku, Yokohama | Kakeru Koumuten | Roof inspection using a drone!
・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 construction and how to choose a contractor.
・Latest! Grants and subsidies available for renovations, and reduction systems!
・How much does it cost for roof work? We introduce the cost range!
・What is the cost range for rain gutter repair and cleaning? Tips on timing, fire insurance, and choosing a contractor!
・Renovation 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!
