A retaining wall has to resist immense pressure from the weight of the soil, but what many people fail to consider is the added force of water accumulation, also called hydrostatic pressure.

“Hydrostatic pressure buildup behind a retaining ... Montgomery County requires a permit and professional design for any retaining wall more than four feet high. And if the soil being retained ...

Poor sub-soil drainage is not just a nuisance – it is a serious structural hazard. In water-rich regions like Durban, where ...