Sakai Kagaku Kogyo has announced two new products to strengthen airtightness and moisture protection around residential foundations and is seeking construction monitors to provide feedback from the field.
Sakai Kagaku Kogyo, which has developed the House Barrier Sheet moisture-proof airtight sheet for residential use, has developed two new products: House Barrier Rail, which seals gaps between the foundation and sill, and House Barrier Ground, which suppresses the movement of water vapor from the ground into the foundation concrete. The products support higher airtightness and insulation performance around foundations and are scheduled to be unveiled at the Japan Home Show & Building Show 2026 exhibition.
As part of a campaign, the company is seeking construction monitors and will provide both products free of charge, in quantities sufficient for one house each, to 3 groups per day, or 9 groups in total over 3 days. Monitors will be asked to provide photos taken during construction and complete a questionnaire about their experience using the products. The feedback will be used for future product improvements and new product development.
House Barrier Rail seals gaps at the joint between the foundation concrete and sill with an airtight component and EPDM rubber, improving its ability to follow uneven surfaces and its ease of installation. House Barrier Ground is a 0.2 mm-thick moisture-proof sheet designed to suppress the movement of water vapor by being laid beneath the slab of a slab-on-grade foundation, while reducing the risk of damage during construction and ensuring durability.
The event, organized by the Japan Management Association, will be held from 18 to 20 November 2026 at Tokyo Big Sight's West Exhibition Hall.