This text has been translated by auto-translation. There may be a slight difference between the original text and the translation. (Original Language: 日本語)

Open now5:15 left before closing time 18:00
Sunday Closed
Monday 8:00-18:00
Tuesday 8:00-18:00
Wednesday 8:00-18:00
Thursday 8:00-18:00
Friday 8:00-18:00
Saturday 8:00-18:00

五月女防水

We build one building at a time with honesty and humility ! We are a waterproofing company that prevents leaks. Please feel free to call us ! Site survey&Estimate is free of charge. Our company specializing in FRP waterproofing prevents leaks on balconies ・ balconies ・ rooftops, etc. ! Please contact us for any other problems you may have.

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Our strengths
After your inquiry, Representative will visit you
We have no sales person. I am the representative of the company and I always feel the temperature and distance with the customers. After you contact us, we will visit your home directly and discuss your problems with you.
High quality, low price
Because we communicate directly with the client, we are able to provide the best service. No intermediate costs !
We will discuss your budget with you.
Waterproofing Construction
Here are our construction photos. In recent years, waterproofing is the mainstream for balconies and balconies of detached houses, and FRP waterproofing is the most common, which is light and strong and requires a short construction period.
We mainly use FRP waterproofing .
No intermediate costs High quality and we will discuss your budget with you.
Please consider waterproofing if any of the following apply to you.
  • Faded surface
  • Fine cracks on the surface.
  • Moss and mold are present throughout.
  • It has been 10 years since new construction and needs to be looked at.
    (Warranty for waterproofing is 10 years after new construction is built)
Kamogawa City T Residence
Balcony Crack Waterproofing
Kisarazu City S Residence
Re-waterproofing of balcony
O's Residence in Chiba City
Balcony repainting waterproofing
Kisarazu M Residence
Balcony Re-Waterproofing
Kisarazu City T Residence
Balcony Re-Waterproofing
Kisarazu K. Residence
Sealing and waterproofing around house windows
If you have any concerns, please feel free to call us regardless of whether or not you are going to have waterproofing work done.
We offer free consultation and site survey !
Maintenance Time
Age-related deterioration phenomenon
UV rays and other causes cause surface The topcoat may crack or the substrate may become visible. If this is the case, it is time to perform maintenance. If this condition is left unattended, the cracks will reach the waterproof layer, causing leaks and further deterioration. Note that failure to make repairs at the appropriate time may increase the cost more than necessary.
The consequences of leaving leaks
This photo was taken when we found the waterproof layer on the side of the balcony had deteriorated during an inspection.
The wood of the balcony itself will decay.
Water rots wood ! If you really don't know this, you are in big trouble !
Routine maintenance
In addition to the effects of sunlight, ultraviolet rays, and rainwater, the waterproofing layer will certainly deteriorate
due to friction caused by walking.
Please contact us before deterioration leads to leaks !
Our Strengths
Technical expertise

FRP waterproofing Our company specializing in balcony ・ balcony ・ prevents leaks on roof tops, etc. !
Please contact us for other problems.

Price for reference
Balcony ・ Veranda ・ Rooftop FRP topcoat only
¥ 65000 ~

Balcony ・ Veranda
FRP re-waterproofing work (varies depending on waterproof layer)
¥ 120000 ~

Interior and exterior
Sealant waterproofing
¥ ¥800 ~


Please feel free to contact us if you have any concerns regardless of whether or not to do the construction !

Major waterproofing projects
・ Verandas and balconies
・ Bathrooms ・ Washroom area ・ Exterior walls and interior sealing work
・ FRP and urethane waterproofing


On-site survey&Free estimate
We will not make any unreasonable proposal or pushy sales, so please feel free to contact us! !
Mayume Waterproof
2888-63 Kuraha, Sodegaura, Chiba 299-0243

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