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 in Funabashi City, Chiba Prefecture, requested by Company A.
There are several types of exterior renovations, and this project involves a roof overlay (cover method) construction!
We implemented measures against leaks due to the roofing work!
On this page, I will explain the actual results of the work done by Kakeru Koumuten!
Thank you very much for choosing Kakeru Koumuten Co., Ltd. from among many contractors.
目次
- 1 Roof Overlay (Cover Method) Construction Procedure
- 1.1 1. Dismantling of Existing Roof Ridge Flashing
- 1.2 2. Installing Roofing (Waterproof Sheet)
- 1.3 3. Fabrication of Accessories (Eaves, Decorative Metal, Valley)
- 1.4 4. Main Construction (Asahi Fiberglass/Ridgeway)
- 1.5 5. Processing of Ridge Board and Sealing at Various Locations
- 1.6 6. Cleaning
- 1.7 Colors
- 2 What is the roof overlay (cover method)?
Roof Overlay (Cover Method) Construction Procedure
1. Dismantling of Existing Roof Ridge Flashing
We will dismantle the existing roofing materials (ridge cap, snow guards) that are unnecessary for the
2. Installing Roofing (Waterproof Sheet)
The roofing used is Nisshin Kogyo/Kappa 23!
It is made of modified asphalt roofing, which is said to have double the lifespan of regular asphalt roofing.
As a primary waterproofing measure, if the roofing is properly installed, there will be no leaks!
We will ensure it is firmly attached to prevent it from blowing away.[/chat]
3. Fabrication of Accessories (Eaves, Decorative Metal, Valley)
Before the main roofing work, we will process and install accessories such as eaves and decorative metal!
The accessories used are made of galvalume steel. [/chat]
4. Main Construction (Asahi Fiberglass/Ridgeway)
After processing the
Once we have installed up to the ridge, we will set up the necessary materials to secure the ridge board called “kanban.” There are two types of kanban: cedar and resin, and this time we used resin!
The resin type is expected to have three times the durability of the cedar type!
5. Processing of Ridge Board and Sealing at Various Locations
After processing the
Once we have installed up to the ridge, we will set up the necessary materials to secure the ridge board called “kanban.” There are two types of kanban: cedar and resin, and this time we used cedar! Next, we will process and install the ridge board. We will ensure that sealing is properly applied to the inside of the joints.
6. Cleaning
We will clean up the debris that has fallen onto the balcony and rain gutters. We will thoroughly carry out the cleaning as nails and metal fragments can lead to injuries. [/chat]
The roofing material used is Ridgeway from Asahi Fiberglass.
Ridgeway comes with a 10-year manufacturer’s warranty.
Since it uses natural stone that is baked onto the surface, it is a roofing material that does not require painting, thus reducing maintenance costs!
Additionally, because it uses fine natural stones on the surface, you won’t be troubled by rain noise.
Moreover, it is a lightweight roofing material, making it strong against earthquakes and providing seismic resistance.
Colors
■ Dual Black
■ Harvard Slate
■ Vintage Green
■ Dual Brown
■ Earthen Cedar
This time, we completed the roofing work on the Earston Cedar very well!
The customer was extremely satisfied, and I was very happy as well!
Thank you very much!
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 the existing one, 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 is generated.
This is the biggest feature and leads to various advantages.
The only parts that require demolition and waste disposal are the ridge caps, 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’s website).
Building materials used in constructions completed 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 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, the construction can be completed in a shorter time frame compared to painting or complete replacement. A shorter construction period means lower labor costs, which in turn makes the overall cost lower.
This also reduces the psychological anxiety of having to live in an unusual environment.
If scaffolding is erected, there may be inconveniences such as difficulty entering and exiting or opening windows. Being able to return to 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 do. We are very grateful that we have been continuously carrying out roof overlay projects without interruption.
| Roofing Material |
|
|---|---|
| Manufacturer Warranty | 10 years |
| Expected Durability | 25 to 30 years |
| Color Used This Time |
Earthen Cedar
|
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.!
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 surpass those of other companies in exterior work!
We welcome competitive estimates with confidence!
You’ll be glad you chose us! We take every request seriously to ensure your satisfaction.
We also have information on roofing costs and pricing plans for 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!
・The Necessity and Timing of Exterior Wall Painting…
・Introducing Roof Materials That Cannot Be Painted or Recommended!!
・What Are the Average Costs for Roof Remodeling? Types of Work and How to Choose a Contractor
・Introducing Current Roofing Materials and Remodeling Methods!!
・Roof Remodeling | What is Roofing? Introducing the Important Roofing Material, Roofing Sheets!
・What Are the Average Costs for Rain Gutter Repair and Cleaning? Tips on Timing, Fire Insurance, and Choosing a Contractor!!
・Renovation Store in Kanagawa Prefecture, Yokohama | What is Roof Overlay (Roof Cover Method)?
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!
