Grading

[Big T]

10% is alot same as a 10% grade on a mountain road. 10' in 100'. 2% is more normal

My math was wrong. 10% of 10’ (120”) is one foot or 12”. That is a lot and it would be impossible to pull off here. Distance from house to fence is 10’. Best drop I can achieve is 4” to 5” from house to fence.

 

[Will L.]

What is this water? Did you drain your pool?

Yeah when you can’t get the slope enough, thats where french drain comes into play.

 

[Big T]

What is this water? Did you drain your pool?

Yeah when you can’t get the slope enough, thats where french drain comes into play.

No French drains. They clog and roots grow in them.

 

[ak diesel driver]

Just make sure you factor in the bottom of the slope will need to have a slope lengthwise as well. Need to get that water to go somewhere.....

 

[Big T]

Just make sure you factor in the bottom of the slope will need to have a slope lengthwise as well. Need to get that water to go somewhere.....

Understood. I have a laser for that and property has a natural downward slope front-to-back.

 

[schiker]

Yeah, I guess that is a bit much. I was mistaken.

The 2018 IBC suggests.

"The ground immediately adjacent to the foundation shall be sloped away from the building at a slope of not less than one unit vertical in 20 units horizontal (5-percent slope) for a minimum distance of 10 feet (3048 mm) measured perpendicular to the face of the wall.

I think it may be suppose to help insure minimum elevations to prevent ponding penetration?
Seems 1/4" per foot - 1 unit vertical to 48 units horizontal ~ 2% disappears in grass and landscaping.

I have had a few grade problems that a drain pipe and/or dry river bed rock path have helped with runoff control. Roof runoff can be a problem. Especially when roof next door is also draining towards your roof runoff. Throw in an impervious driveway or any hard scape and uh-oh.

 

[Big T]

Yeah, I guess that is a bit much. I was mistaken.

The 2018 IBC suggests.

"The ground immediately adjacent to the foundation shall be sloped away from the building at a slope of not less than one unit vertical in 20 units horizontal (5-percent slope) for a minimum distance of 10 feet (3048 mm) measured perpendicular to the face of the wall.

I think it may be suppose to help insure minimum elevations to prevent ponding penetration?
Seems 1/4" per foot - 1 unit vertical to 48 units horizontal ~ 2% disappears in grass and landscaping.

I have had a few grade problems that a drain pipe and/or dry river bed rock path have helped with runoff control. Roof runoff can be a problem. Especially when roof next door is also draining towards your roof runoff. Throw in an impervious driveway or any hard scape and uh-oh.

5% means 6” across the 10’ width. I can get close to that.