[Aoba-ku, Yokohama] A Detailed Guide on 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 as simple as sealing the hole, 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 secondary damage if repairs are not performed.

We also introduce the cost range and how to choose a contractor when requesting a leak repair, 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 if you are in need!

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

When you hire a contractor for roof leak repairs, there will naturally be costs involved.

For this reason, laying a blue tarp on your roof or applying waterproof tape and caulking can help reduce expenses to just material costs, but we do not recommend this for the following three reasons.

 

• It is difficult for amateurs to identify the cause of the leak
• 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, it is best to hire a repair contractor.

Three Causes That Necessitate Roof Leak Repairs

There are many reasons why roof leak repairs may be necessary, but primarily, you need to repair due to 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 roof leak repairs will help you check for any abnormalities in your 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

 

Roof materials include the materials that cover the roof and waterproof sheets, and if they become misaligned or develop 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, which can also cause water infiltration.

Both of these issues can only be confirmed by climbing onto the roof, but since there is a risk of falling, it is advisable to ask a professional.

Water Infiltration from the Exterior Walls

While you might think that water leaks come from gaps in the roof, they can also infiltrate from the exterior walls, so it is necessary to check.

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 the siding
• Deterioration of the caulking
• Rust or deterioration of metal
• Damage to the 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 be sure to check regularly.

Water Infiltration from the Balcony

If you have a balcony at 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 whether the balcony drainage is clogged, as regular inspections are essential.

Methods to Identify the Location of Water Leak Repairs

There are three methods to identify the location of water leak repairs:

 

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

 

When you request a repair service, in most cases, they can 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 a leak visually, we check the following two points.

 

• Location of the leak inside the building
• Roof or exterior wall near the leak

 

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

Additionally, it is necessary to check for corrosion on metal parts and whether the fasteners are loose.

Identifying by Water Spraying

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

We actually spray water from the bottom to the top on the roof and exterior walls to pinpoint the location of the leak.

At this time, since water may leak into the interior, it is advisable to place a bucket inside to prevent any mess.

Also, 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 changes in color, allowing us to identify areas where water is leaking as they will show lower temperatures.

However, due to insulation materials, it may be difficult to detect temperature changes, 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 many locations where leaks can be repaired, but primarily we perform repairs in the following four areas.

 

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

 

By understanding the repair methods for each area, you can determine whether the contractor is performing appropriate repairs when you request their services.

Roof Repair Methods

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

If the roof material is causing the leak, replacing the affected part can prevent further leaks.

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

Additionally, if the wooden supports of the roof are rotting, replacing the wood will also be required, 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 applying 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 or 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 to seep into the interior, without gutters, rainwater will 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 foreign objects, and directs it to the sewer.

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

In such cases, the piping is generally replaced, but if there is damage or deterioration around the drainage area, it may also be necessary to replace the eaves or the supporting wood of the building.

Therefore, it is important to regularly check to prevent the drainage from becoming clogged.

Four Secondary Damages That May Occur If Rain Leak Repairs Are Not Made

If rain leak repairs are not made, the following four secondary damages may occur, so caution is necessary.

 

• Wood Decay
• Termite Damage
• Health Hazards from Mold
• Electrical Circuit Short

 

If repairs are made after secondary damage occurs, the repair costs will increase further, so it is recommended to address the issue early to keep repair costs down.

Wood Decay

If there is a rain leak, be aware that the internal wood may be decaying.

While wood decay may not be visible from the outside, if it is soaked, the wood will be wet and in a high humidity situation.

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

For this reason, if there is a rain leak, the wood is likely to decay, and the costs for repairs may be high.

If there is a rain leak, there is a possibility that the wood is decaying, so it is important to address the issue promptly.

Termite Damage

Termite damage is not directly visible on the surface, similar to wood decay, so caution is necessary.

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

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

Health Hazards from Mold

When the interior of a house becomes wet due to leaks, humidity increases, making it easier for mold to grow.

Mold can be toxic and may cause 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.

Leaks not only damage the house but also pose health risks to the residents, making early repairs essential.

Short Circuits in Electrical Circuits

Not only wood gets wet due to leaks, but electrical equipment can also become wet, posing a risk of short circuits.

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

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

Cost Estimates for Leak Repairs in Izumi-ku, Yokohama

When requesting leak repairs in Izumi-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 yen
Replacement and repair of roof ridge metal	From 10,000 yen
Skylight repair	From 10,000 yen
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 needed.

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 repairs beyond just the leaking area, which could lead to higher repair costs.

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

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

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

 

• 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.

Experience in Rain Leak Repairs

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

The construction results may explain the following items, so check if similar repairs have been performed on 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 peace of mind 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 warranty availability

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

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

Therefore, if the contractor has a warranty period, there may be cases where repairs can be done for free within that warranty period.

Warranty periods vary by contractor, but it is common to have a range from 1 to 10 years.

Additionally, some contractors offer after-sales service separate from the warranty, so make 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 a leak contractor, be sure to obtain estimates from multiple contractors.

Even for the same repair costs, the details of the repairs may differ between contractors, as well as the warranties and after-sales services.

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

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

If you are looking for a leak repair contractor in Izumi-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 we generally recommend requesting a professional service.

While covering the roof with a blue tarp may be something a novice 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 specialist to address.

We do not want to cause you anxiety, but if you postpone repairs thinking that the leak is 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 leak repair service in Yokohama, please contact Kakeru Koumuten Co., Ltd.

Estimates are, of course, free! Feel free to reach out at any time from the page below!

Summary

Our company handles many roofing and exterior painting projects in Aoba-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 mountains and valleys, resulting in significant elevation differences. Because Kakeru Koumuten is well-acquainted with the terrain of Yokohama, we believe that residents of Aoba-ku can confidently rely on us. We are also familiar with the specific warranty conditions in Aoba-ku!

In urgent cases such as leak repairs, we may be able to provide emergency measures without scaffolding, so please consult with us!

For specific requests such as “I want a long-lasting renovation”, “I want to keep costs down”, or “I want to improve insulation because the indoors are hot”, we will provide the optimal solutions.

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, exterior walls, or exterior structures, please consult Kakeru Koumuten Co., Ltd.!
We carry out everything from temporary scaffolding work to roof construction and exterior painting entirely in-house.
We are confident that our costs, quality, and efficiency in exterior work surpass those of other companies!
We welcome competitive estimates with confidence!

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

Helpful information about exterior renovations can be found here!

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!