The 2-Minute Rule for hole tray
You will find strip drains that lay against the outside edge of the footing. Some double as stay-in-put formwork with the footing. A person example of That is Variety-A-Drain which contains a double channel, 1 to work with as the foundation drain and another for radon mitigation or other air flow, if desired. Brittleness in chilly weather and defor