Do you know about the hidden drainage?
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- Опубликовано: 16 фев 2022
- Hidden drainage system with the slot drainage of ULMA.
The slot drainage in either single or double centre slot, or lateral slot, that stands out mainly for its aesthetics, since it integrates perfectly in the pavement, totally blending in with the urban landscape.
More information: www.ulmaarchitectural.com/en-... 
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![How to Build a French Drain Full Tutorial in Less than 10 Minutes [ Veteran Contractor Explains ]](http://i.ytimg.com/vi/wPkMB7qlUSo/mqdefault.jpg)
Yes,they are very bad.😂😂😂😂😂😂😂😂