[Detached House Survey] Top Concern During Rainy Season: 'Cracks' on Exterior Walls and Roofs. Even When Noticing Signs of Deterioration, About 31% Say 'Wait and See'

■Survey on Deterioration Signs of Homes During the Rainy Season and Awareness of Exterior Wall Maintenance

The rainy season arrives every year.

As damp, rainy days continue, you might notice a crack on the exterior wall or dirt on the roof. What action would you take?

For homeowners, the rainy season is a time when the deterioration of their home becomes easily visible.

However, isn't it common for many people to put off action, thinking 'let's just wait and see for now,' even when they are concerned?

Therefore, this time, in collaboration with Glad Inc., we conducted a survey on 'Deterioration Signs of Homes During the Rainy Season and Awareness of Exterior Wall Maintenance' targeting 300 men and women nationwide who responded in a preliminary survey that they 'currently live in a detached house they own.'

*When citing the content of this press release, please comply with the following:

- State that the source is 'a survey by NEXER Inc. and Paint Replacement Shop'
- Place a link to Paint Replacement Shop (https://glad-nagoya.jp/)

Survey Overview: 'Survey on Deterioration Signs of Homes During the Rainy Season and Awareness of Exterior Wall Maintenance'

Survey Method: Internet questionnaire

Survey Period: May 18, 2026 to May 25, 2026

Survey Subjects: Men and women nationwide who responded in a preliminary survey that they 'currently live in a detached house they own'

Valid Responses: 300 samples

Survey Questions:

Question 1: During the rainy season, have you ever noticed or felt any concerning symptoms on your home's exterior walls, roof, balcony, etc.?

Question 2: What symptoms were you concerned about? (Multiple answers allowed)

Question 3: If you notice signs of deterioration on your exterior walls or roof during the rainy season, what action do you take?

Question 4: Please tell us the reason. *For 'Other,' please also tell us what action you take when you notice signs of deterioration on exterior walls or roof during the rainy season.

Question 5: Are you aware that neglecting deterioration of exterior walls and roofs can lead to leaks and affect the lifespan of the home?

Question 6: Would you like to use a 'free diagnosis by a specialist' before or after the rainy season?

Question 7: Please tell us the reason.

*Percentages are rounded to the second decimal place, so totals may not equal 100%.

■31.3% Respond 'Wait and See'

First, we asked if they had ever noticed or felt any concerning symptoms on their home's exterior walls, roof, balcony, etc., during the rainy season.

7.7% said 'often,' and 23.3% said 'sometimes,' meaning a total of 31.0% have experienced some abnormality during the rainy season.

On the other hand, 25.7% said 'not very often,' and 43.3% said 'not at all,' meaning 69.0% have not noticed any symptoms.

Next, we asked those who had noticed symptoms what specific symptoms concerned them.

The most common was 'cracks' at 40.9%, a standout figure, followed by 'moss and mold' at 37.6%, 'rain streak stains' at 28.0%, and 'water stains' and 'fading' tied at 26.9%.

This reveals that visible changes to the exterior wall are a major point of concern for many people.

■31.3% Say 'Wait and See': The Reality That People Cannot Act Immediately Even When Noticing Deterioration Signs

Next, we asked everyone what action they take when they notice signs of deterioration on exterior walls or roofs during the rainy season.

The most common response was 'wait and see for a while' at 31.3%.

This was followed by 'consult with family' at 15.3%, 'notice but leave it' at 14.7%, 'immediately consult a contractor' at 12.0%, 'search for the cause online' at 11.7%, 'do emergency repairs myself' at 9.7%, and 'other' at 5.3%.

While only about 10% immediately consult a contractor, a combined 46% who chose 'wait and see' or 'leave it' are postponing action.

We also asked for their specific thoughts, and introduce some of them here.

Responses from those who chose 'wait and see for a while':

- Because I want to make a proper judgment. (Female, 20s)
- Because even if I spend money on repairs each time, there's a high chance of further deterioration, so I want to do all the repairs at once. (Female, 30s)
- Because I can't judge if it's a big problem. (Male, 30s)

Responses from those who chose 'consult with family':

- Because it's not something I can decide on my own. (Female, 20s)
- Rather than deciding alone, I first consult with my family and think together. (Female, 30s)
- Because I have a family member who is good at DIY. (Female, 40s)

Responses from those who chose 'notice but leave it':

- Because I'm lazy. (Male, 20s)
- Because it seems like it will cost a lot of money and I'm scared. (Male, 30s)
- Because it costs money and is troublesome. (Female, 40s)

Many reasons for choosing 'wait and see' were 'want to be careful because of the cost' and 'can't judge if immediate treatment is necessary.'

On the other hand, some people have a planned perspective, wanting to 'do all repairs at once.' The situation suggests that financial concerns and lack of judgment lead to postponing action.

Knowing that 'leaving it will make it worse' but not knowing where to start is a common concern for homeowners.

■69.7% Respond 'Know' the Risks of Neglecting Deterioration

Next, we asked if they were aware that neglecting deterioration of exterior walls and roofs can lead to leaks and affect the lifespan of the home.

20.7% said 'know well,' and 49.0% said 'know vaguely,' meaning a total of 69.7% have some awareness of this fact.

On the other hand, 30.3% said 'did not know,' meaning one in three people are still unaware of this information.

Since the presence or absence of knowledge directly affects the speed of noticing deterioration signs and responding, it is important to spread accurate information widely.

■42.0% Show Interest in Free Diagnosis, But Concerns About 'High-Pressure Sales' and 'Scams'

Next, we asked if they would like to use a 'free diagnosis by a specialist' before or after the rainy season.

7.7% said 'very much want to use,' and 34.3% said 'somewhat want to use,' meaning a total of 42.0% showed interest.

On the other hand, 33.3% said 'not very interested,' and 24.7% said 'not at all interested,' with 58.0% showing a negative attitude.

What reasons lie behind this divided opinion? We also asked for their thoughts and introduce some of them here.

Responses from those who chose 'very much want to use' or 'somewhat want to use':

- Because I want to solve my concerns. (Female, 20s)
- Because it's interesting if it's free. (Female, 20s)
- Because I'd like to ask for help when I'm in trouble if it's free. (Female, 30s)
- Because I want to get professional knowledge from an expert to know how many years is the appropriate time for replacement. (Female, 30s)
- Because there might be hidden aging phenomena that are not visible. (Female, 30s)

Responses from those who chose 'not very interested'