[Aoba-ku, Yokohama] A Detailed Guide to the Basics of Leak Repair and How to Choose a Contractor!

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

This time, I would like to explain in detail the basic knowledge of leak repairs and how to choose a contractor!

Some may think that leak repairs are simply about sealing the holes, but it cannot be handled without specialized knowledge.

In this article, we explain the reasons why leak repairs are 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 estimates and how to choose a contractor when requesting leak repairs, so
please use this as a reference!

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

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

Leave Leak Repairs in Aoba-ku, Yokohama to the Professionals

When you request leak repairs from a contractor, of course, there will be a fee involved.

For this reason, while laying a blue sheet on the roof or applying waterproof tape and caulking can reduce material costs, 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 may get injured if you fall from the roof

 

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

Three Causes That Require Leak Repairs

There are many reasons why leak repairs are necessary, but primarily, they must be addressed 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 cause rust or the ridge to lift, leading to water infiltration.

Both of these can only be checked by climbing onto the roof, which poses a risk of falling, so it is advisable to ask a contractor for assistance.

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 can be attributed to the following four factors.

 

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

 

It can be 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 it’s important to do this regularly.

Water Infiltration from the Balcony

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

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

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

How to Identify the Location of Water Leakage Repairs

There are three methods to identify the location of water leakage repairs.

 

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

 

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

However, if it is difficult to determine 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 whether the fasteners are 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 identify the source of the leak.

Since water may leak indoors during this process, it is advisable to place a bucket inside 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 in conjunction with the water spraying inspection.

A thermal imaging camera visually captures temperature using colors, 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 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.

 

• 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 the roof material is causing leaks, replacing the affected parts can prevent further leaks.

However, if the damage to the roof 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 large-scale repairs.

Skylight Repair Methods

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, large-scale 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

A drain refers to the piping and cover that collects rainwater in one place, removes leaves and debris, and directs it to the sewer.

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

In this case, the piping is generally replaced, but if there is damage 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.

Four Secondary Damages That May Occur If Roof Leaks Are Not Repaired

If roof leaks are not repaired, be aware that the following four secondary damages may occur.

 

• Wood Decay
• Termite Damage
• Health Issues Due to Mold
• Electrical Circuit Short

 

Once secondary damage occurs, repair costs will increase, so we recommend addressing the issue early to keep repair costs down.

Wood Decay

If there is a roof leak, be cautious as the internal wood may be decaying.

While wood decay cannot be confirmed from the outside, if water is seeping in, the wood will be wet, creating a high humidity situation.

Additionally, the interior of the house does not receive direct sunlight, making it difficult for the wood to dry.

Therefore, if there is a roof leak, the wood is prone to decay, which may lead to high costs for repairs.

If there is a roof leak, there is a possibility that the wood is decaying, so let’s address it promptly.

Termite Damage

Termite damage, like wood decay, cannot be directly confirmed from the surface, so caution is necessary.

Termites prefer humid environments, so if the wood is wet, pillars and beams may be eaten away.

Thus, if there is a roof leak, prompt action is necessary to avoid secondary damage from termites.

Health Issues Due to Mold

When the interior of the house becomes wet due to roof leaks and humidity increases, mold is likely to develop.

Mold can be toxic and may trigger bronchial asthma or allergic rhinitis.

Additionally, there is a possibility of developing sick house syndrome, which can lead to symptoms such as headaches, fatigue, and pain in the eyes and throat.

Water leaks not only cause damage to the home but can also harm the health of the residents, making prompt repairs essential.

Short Circuit in Electrical Wiring

It’s not just the wood that gets wet from water leaks; electrical equipment can also become wet, posing a risk of short circuits in the electrical wiring.

A short circuit can lead to not only the failure of electrical appliances but, in the worst-case scenario, could result in a fire, making it dangerous.

To prevent short circuits, it is crucial to promptly request repairs from a contractor if there is a water leak.

Cost Estimates for Water Leak Repairs in Hodogaya-ku, Yokohama

When requesting water leak repairs in Hodogaya-ku, Yokohama, the cost estimates vary depending on the type of repair, as shown in the table below.

Repair Type	Cost Estimate
Partial Replacement of Roofing Material	¥10,000 – ¥20,000
Roof Replacement (Re-roofing)	From ¥500,000
Roof Overlay (Cover Method)	From ¥400,000
Replacement/Repair of Ridge Cap Flashing	From ¥10,000
Skylight Repair	From ¥10,000
Exterior Wall Repair	From 10,000 yen
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, thereby reducing repair costs.

However, if you postpone leak repairs, you may end up needing to repair areas beyond the leak, which could lead to higher repair costs.

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

There are many contractors for leak repairs in Hodogaya-ku, and you may be unsure which company to choose.

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

 

• Extensive experience in 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 Leak Repairs

Repair contractors often have websites where they showcase their work history.

Their work history may include the following items, so check if they have performed repairs similar to yours.

 

• Repair Details
• Background of the Repair
• Materials Used
• Repair Costs
• Repair Duration, etc.

 

Additionally, having a detailed explanation of the repair work with photos provides peace of mind, as it can serve as a reference when you actually request repairs.

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

Check for Warranty Availability

When selecting a contractor for leak repairs, be sure to check for warranty availability.

Leak repairs can potentially recur even after being fixed once, so if you have to request repairs every time a leak reoccurs, it can lead to significant expenses.

For this reason, if you choose a contractor that offers a warranty period, there may be cases where repairs are 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 service separate from the warranty, so be sure to check whether the contractor you are considering for leak repairs provides a warranty or after-sales service.

Obtain Estimates from Multiple Contractors

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

Even for the same repair costs, the repair details may differ between contractors, as well as the warranty and after-sales service.

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

To request your desired repair contractor at the lowest possible price, obtaining estimates from multiple contractors is essential.

If you are looking for leak repair contractors in Hodogaya-ku, Yokohama, please contact Kakeru Koumuten Co., Ltd.

There are various causes of leaks, and only specialized contractors can accurately identify the specific causes.

The repair details vary depending on the cause, but generally, we recommend requesting 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 leak, the wooden materials inside the house may be damaged, which requires a specialized contractor to address.

We do not intend to cause anxiety, but delaying repairs because the leak seems minor can lead to potential issues such as termite damage or health hazards from mold, so prompt action is necessary.

 

If you are looking for leak repair contractors in Yokohama, please do not hesitate to contact Kakeru Koumuten Co., Ltd.

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

Summary

Our company specializes in exterior renovations such as exterior wall painting and roof overlay work!
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 work and exterior wall painting completely in-house.
We are confident that our costs, quality, and efficiency in exterior work are unmatched compared to other companies!
We welcome competitive estimates with confidence!

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

Here is useful information about exterior renovations!

Consultations via LINE 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!