Hello!
This is 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 an exterior renovation project we undertook in Hanyu City, Saitama Prefecture, commissioned by Company A.
There are several types of exterior renovations, and the work we performed this time was a roof overlay (cover method) project!
We implemented measures against leaks caused by the roofing work!
On this page, we will explain the actual results of the work carried out by Kakeru Koumuten!
Thank you very much for choosing Kakeru Koumuten Co., Ltd. from among many contractors.
目次
Procedure for Joint Replacement Work
1. Removal of Existing Sealing Material
2. Preparation (Masking Tape Application)
3. Primer Application
4. Filling with Sealant
Auton Exceed has approximately three times the durability of standard caulking materials (such as urethane and modified silicone). The expected durability is about 30 years. The cost will be about 50,000 to 100,000 yen higher for a building with a total floor area of 30 tsubo.
5. Finishing with a Trowel
6. Removal of Masking Tape
That concludes the process.
Once again, we were able to finish beautifully!
Roof Replacement Construction Procedure
1. Roofing Installation (Waterproof Sheet)
The roofing used by
2. Custom Fabrication (Curlicue, Eaves, Valley)
Before the main roofing work, we will fabricate and install custom pieces such as eaves and curlicue!
The materials used for the custom pieces are galvalume steel. [/chat]
3. Main Construction (Inagaki Shouji/Hiranbee)
After the custom fabrication, we will install the Hiranbee roofing up to the ridge!
Once the roofing is completed up to the ridge, we will install necessary materials called “nuki” to secure the ridge cap. There are types of nuki made from cedar and resin, and this time we used cedar! [/chat]
4. Ridge Cap Processing and Sealing
We use stainless steel nails and screws that are resistant to rust!
5. Cleaning
About the Roofing Material
The roofing material used is Hiranbi 220 from Inagaki Shouji.
Hiranbi 220 comes with a manufacturer warranty of 15 years for the coating and 25 years for perforation.
For re-roofing and overlaying, we also provide a 10-year construction warranty!
If there are any leaks within 10 years, we will make repairs free of charge.
It is made of Galvalume steel, which is resistant to rust.
The formed panels have been treated with iris folds and wave processing to prevent distortion and enhance strength, as well as improve rain drainage and aesthetic effects.
Additionally, it excels in finish, durability, sound insulation, and wind resistance, and is lightweight compared to other roofing materials, which reduces the sway during earthquakes, making it a good earthquake countermeasure.
In this overlay (cover) construction, the roof becomes double-layered, which increases the weight, but Hiranbi is a lightweight roofing material, making it suitable for overlay (cover) construction.
Colors
Extreme – MAX Type
■ Gray Silver
■ Silver Black
■ Sepia
■ Moss Green
■ Bamboo Green
■ Midnight Blue
■ Jet Black
■ Dark Brown
■ Bright Red
General Type
■ Steel Black
■ Maroon Brown
■ J Silver
You can choose from these options!
This time, the cover work with Jet Black turned out exceptionally well!
Thank you for your request!!
Please take a look at 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 laid over another, it is also referred to as “重ね葺き” (kasane-buki).
Benefits of the Roof Overlay Method
Since we place a “new roof” over the “current roof,” demolition work is almost unnecessary, meaning that very little waste is generated.
This is the biggest feature and leads to various benefits.
The only parts that require demolition and waste disposal are the ridge cap, so compared to roof replacement, the cost is lower.
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).
Building materials used in structures constructed before 2004 may contain asbestos. Asbestos-containing materials are difficult to demolish due to their high environmental impact, and the costs for demolition and waste disposal are also high. The roof 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. Unless they are destroyed or crushed, they 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 time frame compared to painting or 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 set up, you may experience inconveniences such as difficulty entering and exiting or being unable to open windows. Being able to return to your normal life in a short period is a significant advantage.
Our company specializes in roofing work, but the roof overlay method is the most frequently performed type of work we undertake. We are very grateful that we have been able to continuously carry out roof overlay projects without interruption.
| Roof Material | Inagaki Shoji / Hiranbi 220
|
|---|---|
| Manufacturer Warranty | Coating 15 years; Perforation 25 years |
| Expected Durability | About 35 years |
| Color Used This Time | Jet Black
|
Estimates and inspections are, of course, free! If you have any concerns regarding roofs, rain gutters, exterior walls, or exterior work, please consult Kakeru Koumuten Co., Ltd.!
We carry out everything from temporary scaffolding work to roof construction and exterior painting completely in-house. We are confident that our costs, quality, and organization are unmatched compared to other companies!
We welcome competitive estimates with confidence!
You’ll be glad you asked! We take every request seriously to ensure you feel satisfied with our service.
We look forward to your inquiries. Thank you very much!
Helpful information about exterior renovations can be found here!
・The Necessity and Timing of Exterior Wall Painting…
・Limited to Kanagawa and Tokyo｜For those who want to try DIY exterior wall and roof painting! Scaffolding only! Roof and Exterior Wall Painting DIY Plan!
・Introducing Roof Materials That Cannot Be Painted or Recommended!
・What is the Cost Range for Roof Remodeling? Types of Work and How to Choose a Contractor
・Introducing Current Roof Materials and Remodeling Methods!・Roof Remodeling | What is Roofing? Introducing the important building material, roofing sheets!
・What are the market prices for rain gutter repair and cleaning? Tips on timing, fire insurance, and choosing contractors!
・Renovation store in Yokohama, Kanagawa Prefecture | 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!
