山中製作所 Company Profile

The APS ventilation method is a ventilation construction technique for wooden houses that uses a special dimpled sheet, GEO500, instead of battens to secure the ventilation layer, making it easy for anyone to install a lath and mortar exterior wall.

Notice of Suspension of Air Passage Sheet Production We have received positive feedback regarding the APM method; however, we have decided to suspend the production of the "Air Passage Sheet," which has waterproof and moisture-permeable properties. The main raw material for the Air Passage Sheet, non-woven fabric originating from the EU, has been affected by an unexpectedly rapid depreciation of the yen (against the euro), rising import transportation costs, and increasing domestic manufacturing expenses. While we would like to pass these costs onto the product, we find ourselves in a position where we must request a price increase that exceeds the added value. Therefore, after much deliberation, we have made the difficult decision to suspend production. We are currently considering alternative non-woven fabrics that meet the specifications and costs, both domestically and internationally, but we do not have a timeline for resuming production. We sincerely apologize for the inconvenience this may cause to those who have been using our products, and we ask for your understanding. Please note that we will continue to sell other products, such as Metal Rib Type 1 (high corrosion-resistant lath) and alkali-resistant glass fiber mesh, aside from the APM method sheets. Additionally, for ventilation methods in wooden houses, we kindly ask you to use the lath-based substrate ventilation method (single-layer substrate ventilation method).

The "APM Method" received the Excellent Product and Technology Award (2021) from the Japan Building Materials Association at KENTEN 2021, as well as the Excellent Award (from the Osaka Prefectural Association of Architects). This award is the only one in Japan recognized by the Ministry of Economy, Trade and Industry and the Ministry of Land, Infrastructure, Transport and Tourism for building materials and housing equipment. It is awarded based on a comprehensive evaluation by the Excellent Product and Technology Award Selection Committee, which assesses whether the product or technology contributes to the realization of a safe and comfortable living environment, the renewal and maintenance of safe and high-quality housing and building stock, and the maintenance and enhancement of regional attractiveness, considering factors such as novelty, originality, design, marketability, functionality, safety, practicality, and relevance to the times.