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Grade slope toward house help

Posted by adaman04 none (My Page) on
Wed, Apr 30, 14 at 12:19

I have a grading fix question I'm hoping the hive can help me with. I will try to be as brief and as thorough as possible.

First is a picture of the front of my home from a year and a half ago before the final grading was done. As you can see the brick ledge on the area of brick to the left was really put lower than it should have been. In this picture, everything below the red line is foundation wall behind the brick, there is not wood wall behind the brick below this line which is good for my predicament. My lot slopes two directions. Away from the house front toward the street and right to left as shown in the picture. The yellow line indicates an "ideal" grade slope right to left and is just for reference.

When the final grading was done and everything settled a little, the grade near the house sloped slightly toward the house. Obviously with a basement this is not ideal, so last fall and again this spring I've started building the grade up to slope away from the house. The issue is if I continue the slope all the way to the house, it will put the dirt against the brick which isn't good (it will block the weeps and put lateral pressure against the brick veneer, right?) So I have stopped the grade build-up about a foot away from the house temporarily as shown in the first detail. This has created a "trech" of sorts right near the house, but it is better than 4'-0" of negative grade pushing water toward the basement IMO.

Detail 2 shows an idea that I thought up this morning. Essentially I'm thinking a mini retaining wall to hold the grade back and backfilling the small remaining gap with (likely rubber) mulch when I do the landscaping.

Cutting the grade down isn't an option with the amount of slope to the street; the issue stems from the brick ledge being too low as mentioned.

Questions:

1) Any thoughts on how to best address this?
2) I had considered some type of trench drain to carry the brick weep drainage and brick surface runoff from left to right in the picture. Perhaps some sort of trench drain/gutter below the weeps? Any recommendation on what to use for that?

Thanks so much for your time, I really appreciate it.

Adam

This post was edited by adaman04 on Wed, Apr 30, 14 at 12:29


Follow-Up Postings:

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RE: Grade slope toward house help

Detail 1

This post was edited by adaman04 on Wed, Apr 30, 14 at 12:25


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RE: Grade slope toward house help

Detail 2


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RE: Grade slope toward house help

Current pic at front of house


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RE: Grade slope toward house help

And one last pic showing the view looking up the "trench"...


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RE: Grade slope toward house help

What you don't want is moisture to seep into the wall and get close to wood inside. I would first establish where the grade should be (disregarding that part of the wall is brick). Mark it out with a chalk line. Extend the bituminous waterproofing (such as what has already been applied to the concrete) to that line, including the brick that will be buried. Backfill and establish a proper grade. I wouldn't worry that a small amount of waterproofing will be above grade in the end. It will be covered by plantings.

The scheme of filling a trench with rubber mulch will not work because it, too, will hold moisture which will eventually work its way into the wall. It is waterproofing DIRECTLY ON THE WALL that you need. Forget all the landscape fabric, plastic, etc. This stuff will not do the job of waterproofing. Ultimately, it will be in the way -- probably fairly early on -- and will get torn up, at which point it will become a mess.


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RE: Grade slope toward house help

Thanks for the response yardvaark. My concerns with putting the brick veneer below grade were lateral pressure from the soil pushing on the veneer and possibly cracking it and clogging my brick weeps which are at the very bottom of the veneer where it bears on the brick ledge. Any thoughts on that?


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RE: Grade slope toward house help

I don't think you would have problems with pressure from such a shallow buildup. I forgot about the weeps. It doesn't sound like something you'd want to cover. A ventilated channel/cavity would be better than one filled with rubber mulch. Could your create the retaining arrangement and securely cover an unfilled channel with some type of home-made light duty grate (so that some child's leg doesn't fall in)?


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