What is Waterproofing Work? Kakeru Koumuten Co., Ltd. Thoroughly Explains Its Meaning, Benefits, and Types of Construction Methods!

To protect buildings from rainwater and other elements, it is necessary to carry out waterproofing work.

That said,

“Does waterproofing work really matter?”

“What kind of construction methods are available?”

Many people may have such questions.

In this article, we will explain in detail the meaning, benefits, and methods of waterproofing work.

What is waterproofing work?

As explained at the beginning, waterproofing work is the construction done to prevent rainwater and other elements from entering the interior of a building.

If rainwater enters the interior of a building, it can affect the durability of the structure.

Japan has a rainy season, and typhoons occur during this time.

To maintain the durability of a building in such an environment, waterproofing work is essential.

What are the benefits of waterproofing work?

Next, let’s take a closer look at the benefits of carrying out waterproofing work.

Prevents deterioration of the building

When water seeps into the interior of a building,

・Columns
・Beams

can rot, and metal can rust.

When such troubles occur, the lifespan of the building shortens and aging progresses at an astonishing speed.

By carrying out waterproofing work, the durability of columns, beams, and metal can be maintained, making it easier to ensure the safety of the building.

Maintains a beautiful appearance

Regardless of whether it is wooden or concrete, rainwater can adversely affect various parts.

In some cases, the building itself may discolor, damaging its beautiful appearance.

By carrying out waterproofing work, you can maintain a beautiful appearance for a long time, allowing for a comfortable living environment.

Typical methods of waterproofing work

Next, let’s explain in detail the typical methods of waterproofing work.

Urethane waterproofing

Urethane waterproofing refers to the method of applying a liquid waterproofing material that has been mixed with curing agents such as polyols.

Urethane waterproofing is,

・Rooftop
・Balcony

There is an advantage in that it can be easily installed in various locations.

Since the cost is relatively low, it can be said to be ideal for those who want to keep construction costs down.

FRP Waterproofing

FRP stands for

“Fiber Reinforced Plastics”

and is also known as fiber-reinforced plastic.

FRP waterproofing is a method that involves applying liquid polyester resin while curing the surface,

with characteristics such as being resistant to:

・Heat
・Ultraviolet rays
・Chemicals

Additionally, the construction period is often around 1 to 2 days,

making it ideal for those who think, “I want it done as soon as possible.”

However, it is important to note that the price tends to be higher compared to other waterproofing methods.

PVC Sheet Waterproofing

PVC sheet waterproofing is a method that involves applying sheets made of polyvinyl chloride resin.

The advantages include:

・Durability
・Wear resistance

It also provides waterproofing effects at a low cost and in a short period, making it ideal for those seeking immediate results.

However, be aware of the following disadvantages:

・It cannot be applied neatly on complex shapes
・It is weak against impacts

Rubber Sheet Waterproofing

The method of applying synthetic rubber sheets to the substrate is called rubber sheet waterproofing.

・High workability
・Easily follows cracks

While there are advantages such as these,

・Not suitable for complex shapes
・Cannot be applied neatly on uneven surfaces

there are also disadvantages.

Asphalt Waterproofing

Asphalt waterproofing is a waterproofing method where high-temperature asphalt is applied over a waterproof sheet and then reinforced.

There are three methods of asphalt waterproofing:

・Hot method
・Torch method
・Cold method

Please check out Kakeru Koumuten’s painting and waterproofing project results here!

How much does waterproofing work cost?

The cost of waterproofing work varies depending on the method used,

 

Urethane Waterproofing	4,000 yen – 8,000 yen
Asphalt Waterproofing	6,000 yen – 8,000 yen
Sheet Waterproofing	5,000 yen – 8,000 yen
FRP Waterproofing	6,000 yen – 8,000 yen

（per 1㎡）

is often the case.

However, the amount may vary depending on the location of the work, so we recommend obtaining multiple estimates.

What to Consider When Choosing a Waterproofing Contractor?

When selecting a waterproofing contractor, it is important to pay attention to:

・After-sales support
・Track record
・Estimated cost

Missing even one of these can lead to unsatisfactory results, so caution is necessary.

Our company, Kakeru Koumuten Co., Ltd., also offers various waterproofing services, so if you are struggling to choose a contractor, please feel free to contact us.

Summary

Waterproofing work is an essential process for maintaining the durability and appearance of a building.

There are various types of waterproofing, each with different advantages and disadvantages.

If you are considering waterproofing work, try narrowing down the methods suitable for your installation location based on the information introduced this time.

“I want to consult about the method”

“I want to consult about the cost”

If you have any questions, please feel free to contact us!

For more helpful information on exterior renovations, click here!

We welcome inquiries via LINE as well◎

For roofing, guttering, and exterior work and repairs in Kanagawa, contact Kakerukoumuten Co., Ltd..

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!