[Naka-ku, Yokohama] Detailed Explanation of Basic Knowledge for Leak Repair and How to Choose a Contractor!

Hello! This is Kakeru Koumuten Co., Ltd.!

This time, we would like to explain the basics of leak repair and how to choose a contractor in detail!

Some may think that leak repair is simply sealing the holes, but it cannot be handled without specialized knowledge.

In this article, we explain the reasons why leak repair is necessary, how to identify the causes,
repair methods, and the secondary damage that can occur if repairs are not made.

We also introduce the cost range and how to choose a contractor when hiring a leak repair service, so please
use this as a reference!

If you are unsure which contractor to choose, our company, “Kakeru Koumuten Co., Ltd.” also accepts leak repairs!

Since prompt action is necessary for leak repairs, please feel free to contact us from the page below!

Leave leak repairs in Naka-ku, Yokohama to the professionals

When you hire a contractor for leak repairs, of course, there will be costs involved.

For this reason, while you can save on material costs by laying blue sheets on the roof or applying waterproof tape and caulking yourself, we do not recommend it for the following three reasons.

 

• It is difficult for amateurs to identify the cause of leaks.
• There is a possibility of worsening the condition instead.
• You could get injured if you fall from the roof.

 

For the reasons above, if you lack knowledge about leaks or feel even slightly uneasy about working at heights, please hire a repair contractor.

Three Causes That Require Leak Repairs

There are many reasons why leak repairs may be necessary, but primarily, repairs must be made for the following three reasons.

 

• Water infiltration from the roof
• Water infiltration from the exterior walls
• Water infiltration from the balcony

 

Understanding the main reasons for needing leak repairs will help you check for any abnormalities in the building.

Water Infiltration from the Roof

There are two main types of water infiltration from the roof.

 

• Damage or deterioration of roofing materials
• Damage or deterioration of the parts that secure the ridge of the roof

 

Roofing materials include the materials that cover the roof and waterproof sheets, and if they shift or have holes, they can cause water infiltration.

Additionally, the ridge of the roof refers to the part where the roof meets in a peak shape, and deterioration of the nails or screws that secure the ridge can lead to rust or the ridge lifting, causing water infiltration.

Both of these issues cannot be checked without climbing onto the roof, but since there is a risk of falling, it is best to ask a contractor for help.

Water Infiltration from the Exterior Walls

While you might think that leaks occur from gaps in the roof, it is also necessary to check for water infiltration from the exterior walls.

Currently, many homes use siding, and the main causes of water infiltration from the exterior walls are considered to be the following four:

 

• Deformation of siding
• Deterioration of caulking
• Rust or deterioration of metal
• Damage to siding

 

It is difficult to find small damages or issues on the second floor, but you can visually check the condition of the exterior walls on the first floor, so be sure to check regularly.

Water Infiltration from the Balcony

If the balcony is part of your home, be aware that deterioration of the balcony can also lead to water infiltration.

Balconies are generally equipped with drainage systems, and if they become clogged for any reason, water can accumulate, leading to deterioration of the floor and window frames.

Therefore, it is also important to regularly check if the balcony drainage is clogged, as regular inspections are essential.

How to Identify the Location of Water Leakage Repair

There are three methods to identify the location of water leakage repair:

 

• Identify visually
• Identify by sprinkling water
• Identify using a thermal imaging camera

 

When you request a repair contractor, they can usually identify the cause visually.

However, if it is difficult to identify the cause visually, they will use water sprinkling and infrared cameras to pinpoint the issue.

Identify Visually

When identifying the cause of water leakage visually, check the following two points:

 

• Location of water leakage indoors
• Roof or exterior wall near the water leakage

 

When checking the roof and exterior wall materials, look for any cracks or peeling in the material, as well as gaps or cracks in the joints.

It is also necessary to check for corrosion on metal parts and ensure that fasteners are not loose.

Identifying by Water Spraying

When identifying the cause of leaks by spraying water, the investigation can only be conducted on sunny days.

Water is sprayed from the bottom to the top of the roof and exterior walls to pinpoint the location of the leak.

Since water may leak indoors during this process, it is advisable to place a bucket indoors to prevent any mess.

Additionally, since water may leak after some time has passed, do not remove the bucket immediately after spraying.

Identifying with a Thermal Imaging Camera

Identifying the cause with a thermal imaging camera is conducted alongside the water spraying inspection.

A thermal imaging camera visually captures temperature differences in color, allowing for the identification of leak areas where the temperature is lower.

However, it may be difficult to detect temperature changes due to insulation materials, so using heating or cooling systems can make it easier for the thermal imaging camera to capture temperature variations.

Kakeru Koumuten Co., Ltd. owns a thermal imaging camera, so we can conduct inspections!

Methods for Repairing Leaks by Location

There are various locations where leaks can be repaired, but primarily, we focus on the following four areas for repairs.

 

• Roof Repair Methods
• Skylight Repair Methods
• Rain Gutter Repair Methods
• Drainage Repair Methods

 

Understanding the repair methods for each location allows you to determine whether the contractor is performing appropriate repairs when you request them.

Roof Repair Methods

Roof repairs are among the most common repairs due to leaks.

If rain leakage is caused by the roofing materials, replacing the affected parts can prevent further leaks.

However, if the roof damage is extensive, a complete roof replacement may be necessary.

Additionally, if the wood supporting the roof is rotting, it will also need to be replaced, which can increase repair costs.

For this reason, having a contractor regularly check the condition of your roof can help prevent leaks and avoid major repairs.

Skylight Repair Methods

Rain leaks from skylights occur due to the deterioration of caulking, so removing the old caulking and repairing it with new caulking can resolve the leaks.

Additionally, covering the caulking area with metal sheeting can also improve the situation.

However, if not only the caulking around the skylight but also the roofing materials and wood are damaged, extensive repairs may be necessary as explained above.

Rain Gutter Repair Methods

Rain gutters are materials used to collect and drain rainwater that falls on the roof.

While damage to the rain gutters does not cause water intrusion indoors, without gutters, rainwater can flow like a waterfall, creating noise.

Therefore, if the rain gutters are damaged, they should be replaced, and if they are clogged with sand or leaves, they should be disassembled and cleaned.

Drainage Repair Methods

Drains refer to the pipes and covers that collect rainwater in one place, remove leaves and foreign objects, and direct it to the sewage system.

Drains can leak due to deterioration at the collection point or pipe joints.

In this case, the pipes are generally replaced, but if there is damage or deterioration around the drainage area, it may also be necessary to replace the eaves or the wood supporting the building.

For this reason, let’s regularly check to ensure that the drain is not clogged.

Cost Estimates for Leak Repairs in Naka-ku, Yokohama

When requesting leak repairs in Naka-ku, Yokohama, the cost estimates vary depending on the repair details, as shown in the table below.

Repair Details	Cost Estimate
Partial replacement of roofing materials	¥10,000 – ¥20,000
Roof replacement (re-roofing)	From ¥500,000
Roof overlay (cover method)	From ¥400,000
Replacement and repair of ridge metal	From ¥10,000
Skylight repair	From ¥10,000
Exterior wall repair	From ¥10,000
Rain gutter replacement	From 10,000 yen

 

Additionally, if scaffolding is required, an extra 100,000 to 150,000 yen will be necessary.

By conducting repairs early, you can minimize the scope of repairs, which can also reduce repair costs.

However, if you delay rain leak repairs, you may end up needing to repair areas beyond the leak, which could result in higher repair costs.

How to Choose a Contractor for Rain Leak Repairs in Naka-ku, Yokohama

There are many contractors for rain leak repairs in Naka-ku, and it can be confusing to decide which company to choose.

Therefore, when requesting rain leak repairs, be sure to check the following three points.

 

• Extensive experience in rain leak repairs
• Check for warranties
• Obtain estimates from multiple contractors

 

By confirming the above three points, you will be able to choose a contractor that will respond properly.

Extensive experience in rain leak repairs

Repair contractors often have websites where they showcase their project achievements.

Project achievements may include the following items, so check if they have performed repairs similar to your home.

 

• Repair details
• History leading up to the repair
• Materials used
• Repair costs
• Repair duration, etc.

 

Additionally, if the repair details are explained in detail with photos, it provides reassurance as a reference when you actually request repairs.

If you are concerned about whether the contractor you are about to hire will respond properly, choose a contractor with extensive repair experience.

Check for warranties

When choosing a rain leak repair contractor, be sure to check for warranties.

Water leak repairs can recur even after a repair has been made, so if you request repairs every time a leak reappears, it can lead to significant expenses.

For this reason, if you choose a contractor that offers a warranty period, you may be able to get repairs done for free within that warranty period.

The warranty period varies by contractor, but it is generally set between 1 to 10 years.

Additionally, some contractors offer after-sales services separate from warranties, so it’s important to check whether the contractor you are considering for water leak repairs provides warranties or after-sales services.

Obtain estimates from multiple contractors

When requesting repairs from a water leak contractor, be sure to obtain estimates from multiple contractors.

Even if the repair costs are the same, the details of the repairs and the warranties or after-sales services may differ between contractors.

Furthermore, obtaining multiple estimates makes it easier to negotiate prices.

To request your preferred repair contractor at a lower price, obtaining estimates from multiple contractors is essential.

If you are looking for a water leak repair contractor in Naka-ku, Yokohama, please contact Kakeru Koumuten Co., Ltd.

The causes of water leaks are varied, and only specialized contractors can accurately identify the specific causes.

The content of the repairs will vary depending on the cause, but it is generally recommended to request a contractor’s assistance.

While covering the roof with a blue tarp may be something a layperson can do, it is dangerous due to the risk of falling.

Additionally, if there is a water leak, the wooden materials inside the house may be damaged, which requires the expertise of a specialized contractor to address.

We do not want to cause you anxiety, but if you delay repairs because the water leak seems minor, there is a possibility of termite damage or health issues due to mold, so prompt action is necessary.

 

If you are looking for a water leak repair contractor in Yokohama, please consider Kakeru Koumuten Co., Ltd.

Estimates are, of course, free! Please feel free to contact us anytime from the page below!

Summary

Our company handles many roofing and exterior painting projects in Naka-ku, Yokohama. We are happy to assist with partial roof repairs such as roof overlays, roof replacements, exterior painting, exterior cladding replacements, and leak repairs!

Yokohama is characterized by its many hills and valleys, resulting in significant elevation differences. Because Kakeru Koumuten is well-acquainted with the terrain of Yokohama, we believe that residents of Naka-ku can confidently entrust us with their projects.
Due to the proximity to the sea in certain areas of Naka-ku, the manufacturer’s warranty period may vary due to sea breezes.
It is necessary to confirm warranty conditions before construction.
Kakeru Koumuten is well-versed in the details of warranty conditions in Naka-ku!

“I want my renovation to last a long time”, “I want to keep costs as low as possible”, “I want to improve insulation because my room is hot”—we provide optimal solutions for specific requests.

Our company specializes in exterior renovations such as exterior painting and roof overlay work!
Estimates and inspections are, of course, free!

If you have any concerns regarding roofs, rain gutters, exteriors, or exterior structures, please consult Kakeru Koumuten Co., Ltd.!
We carry out everything from temporary scaffolding work to roofing and exterior painting completely in-house.
We are confident that our costs, quality, and organization for exterior work are unmatched!
We welcome competitive estimates!

We look forward to your inquiries. Thank you very much.

Click here for helpful information about exterior renovations!

LINE consultations are also very welcome◎

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!