Hello!
I am Yamanaka from Kakeru Koumuten Co., Ltd., a specialist in roofing, exterior wall painting, and exterior renovations located in Aoba-ku, Yokohama!
This is a case study of an exterior renovation project in Aoba-ku, Yokohama.
There are several types of exterior renovations, and this project involves roof overlay (cover method) and exterior wall covering (siding)!
We also received requests for exterior wall painting and waterproofing work!
We have also uploaded case studies for exterior wall painting and waterproofing, so please take a look if you’re interested!
On this page, I will explain the actual results of the work done by Kakeru Koumuten!
Thank you very much for choosing Kakeru Koumuten!
Roof: Asbestos-containing colonial – Nichiha/Alma
Exterior wall: Tile – Kaimu/Harubanjan (metal siding)
Roof Overlay (Cover Method) Construction Procedure
1. Dismantling Existing Ridge Flashing
2. Roofing Installation (Waterproof Sheet)
This material is a delayed-type adhesive modified asphalt roofing, which is said to have double the durability of regular asphalt roofing.
With a solid roofing layer serving as the primary waterproofing, there will be no leaks!
We will securely adhere it to prevent it from blowing away.
3. Custom Fabrication (Curlicue, Eaves, Skylight Metalwork)
This time, the eaves are processed with flat metal sheets. The materials used are Galvalume steel sheets.
The skylight (top light) metalwork will also be processed from flat sheets.
4. Main Construction (Nichiha/Alma)
Once the roofing is completed up to the ridge, we will install necessary materials called “kanbari” to secure the ridge metalwork. There are types of kanbari made from cedar and resin, and this time we used a resin kanbari! The overhang of the dormer will also be covered with flat metal sheets.
5. Ridge Metalwork & Sealing at Various Locations
We will process and install the
At the wall edge, we will process and install a component called rain gutter flashing.
We use stainless steel nails and screws that are resistant to rust!
6. Cleaning
We will clean up any debris that has fallen onto the balcony and rain gutters. We will conduct a thorough cleaning to prevent injuries from nails and metal scraps. [/chat]
About Roofing Materials
The roofing material used is Nichiha’s Alma.
Alma comes with a 10-year manufacturer warranty.
Since it uses natural stone that is baked on the surface, it is a roofing material that does not require painting, thus reducing maintenance costs!
With fine natural stones on the surface, you won’t be troubled by rain noise.
Additionally, it is a lightweight roofing material, making it strong against earthquakes and providing seismic resistance.
For details on each warranty, please click here!
Colors of Alma
■ Black AR
■Gray AR
■Green AR
■Brown AR
■Camel AR
This time, the roof work with Gray AR 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 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 installed in layers, it is also referred to as “layered roofing.”
Advantages of the Overlay Method
Since a “new roof” is placed over the “current roof,” there is almost no need for demolition work, meaning very little waste is generated.
This is the biggest feature and leads to various advantages.
The only part that requires demolition and waste disposal is the ridge cap, making it more cost-effective compared to full 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 website).
Some building materials used in constructions completed before 2004 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 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 on your home, please feel free to consult with us.
Additionally, we can complete the work in a shorter time frame than 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 opening windows. 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 are continuously able to carry out roof overlay (cover method) projects without interruption!
Siding Cover Work Construction Steps
1. New Sheathing Installation
2. Installation of Moisture-Permeable Waterproof Sheet & Battens
After finishing the installation of the moisture-permeable waterproof sheet, we will attach battens to the exterior wall.
An air layer will be created between the battens.
Even if moisture penetrates behind the metal siding, the air layer allows rainwater to be expelled, preventing it from entering the interior of the wall.
Prevents leaks.
Enhances insulation effectiveness.
Improves soundproofing.
Prevents condensation inside the walls (making the building less prone to damage).
3. Installation of Accessories (Base Flashing, Starter, Trim)
We insert the siding into these trims and secure the metal siding.
4. Metal Siding Installation
The direction of this installation is horizontal.
It is also called horizontal siding!
Additionally, there is vertical siding that is installed vertically!
5. Installation of Corner Accessories
We will attach finishing materials (caps) called corner accessories to this part.
The cats seemed curious about the construction process! (laugh)
That’s all!
Our customers were very pleased!
Thank you very much!
| Roof Material |
|
|---|---|
| Manufacturer Warranty | 10 years |
| Color Used This Time |
Gray AR
|
| Siding | KMEW/Haru Ichiban (Metal Siding) |
|---|---|
| Warranty | 10 years |
| Pattern/Color | Diagonal Stone Pattern/Gran Gray |
| Material | Galvalume Steel |
| Coating | Heat-Reflective Fluororesin Baked Finish |
Leave Your Roof Renovation in Aoba-ku, Yokohama to Kakeru Koumuten!
Our company is based in Aoba-ku, so we have extensive experience in roof renovations in the area.
We are happy to assist with roof overlay work, roof replacement, and even partial roof repairs such as leak fixes.
If you have any questions like “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 a home exterior renovation company in Aoba-ku, Yokohama, we have handled many roof renovations and deeply understand the needs of local customers. Whether you want “to make it last long with one renovation,” “to keep costs down,” or “to improve insulation because the indoors are hot,” we provide optimal solutions for your specific requests.
Long-Term Reliability
All the roofing materials we use come from reliable products that offer long-term warranties. For example, the roofing material we used this time is Nichiha’s Alma.
Alma comes with a 10-year manufacturer warranty, allowing you to use it with peace of mind for a long time after just one renovation.
Summary
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 conduct everything from temporary scaffolding work to roofing and exterior painting completely in-house.
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, and 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 also have information on roofing costs and pricing plans for roof overlay methods, so please take a look if you’re interested!
We look forward to your inquiries. Thank you very much.
Useful information about exterior renovations can be found here!
・Aoba-ku, Yokohama | Roof Overlay Method | We performed the overlay method using Super Galtect!
・Aoba-ku, Yokohama | Roofing | We performed roof replacement using Super Galtect!
・Miyamae-ku, Kawasaki | We performed a roof overlay method using Hilanbee 220!
・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 are the average costs for roof remodeling? Types of construction and how to choose a contractor.
・Subsidies | Information on subsidies and grants available for remodeling!
・How much does it cost for roofing work? We will introduce the average costs!
・What is the price range for rain gutter repair and cleaning? Tips on timing, fire insurance, and choosing a contractor!!
・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!
