| 摘要 |
The method involves interconnecting channels (20). A hollow space forming system is attaching on an upper side of an underground by the channels before applying a substratum (14) on the underground such that areas that lie between the channels are opened to the underground. The channels are opened at a lower side. Passage openings are provided in walls of the channels for discharging water and/or water vapor accumulating in the substratum in channel-systems. An independent claim is also included for a laminar ventilating and/or drainage material for implementing a method for manufacturing drained and/or ventilated substratum from pourable or free-flowing and/or malleable materials on a stable underground for a floor covering. |
