I want to build a building (plan right now is 16x24) on the side of my house and it will be basically built over top the lowest point of the area (which already slightly holds water after a rain). Originally, I was thinking I'd make a french drain first and the intake grate would be under the building after it was built. However, my guy who is going to help build it wants to built a form from wood, fill with sand, then gravel, then some kind of granite powder over the gravel he says will make the pad almost like concrete, so in that case I can't really do the french drain idea since the water won't really be able to drain "under" the building as it would have if it was just built on skids with no raised pad.
If done this way, the raised gravel pad would be higher than the surrounding ground and then of course the building would be on skids on-top the gravel, so the building would not be at risk of flooding, but the water would all drain towards the the permanent wood form that outlines the pad and probably eventually rot it, not to mention if water got under it and kept the dirt below the pad soft/wet all the time?
I need someone who either can tell me someone, or is that someone themselves to come out for a fee and use instruments to figure the slopes, etc. and tell me exactly how best to approach this BEFORE I ever break any ground. What kind of person do I need to guarantee they know what they are talking about? Engineer, landscaper, grader?
Thanks fellas!
If done this way, the raised gravel pad would be higher than the surrounding ground and then of course the building would be on skids on-top the gravel, so the building would not be at risk of flooding, but the water would all drain towards the the permanent wood form that outlines the pad and probably eventually rot it, not to mention if water got under it and kept the dirt below the pad soft/wet all the time?
I need someone who either can tell me someone, or is that someone themselves to come out for a fee and use instruments to figure the slopes, etc. and tell me exactly how best to approach this BEFORE I ever break any ground. What kind of person do I need to guarantee they know what they are talking about? Engineer, landscaper, grader?
Thanks fellas!