Proper grading and drainage is very important to home maintenance. Many homes that I see have improper grading and drainage that can sometimes result in foundation and other issues. The top 3 issues I see and comment on are:
1) Improper drainage from foundation and not a decline at all locations away from the slab and/or a 6 inch decline at 10 feet away or less than a 5 % slope to swale when barrier prevents 6 in/10ft. When this is correct it is called a protective slope.
Q;You may ask what does this mean?
A; text book calls for above but in most homes you do not have this, however we must attempt to have any slope away from the slab at all locations.
A; so as you are doing yard work this spring please look for this and address those locations.
2) Erosion or ponding next to the foundation;
Q; Why not what does this hurt?
A; again as mentioned above this can result in foundation problems not to mention cause other insect, mosquito concerns etc. EX. if the dog or other animal digs a hole, the downspout erodes a hole, the runoff of water from the above roof valley digs a hole or shrubs cause- please fill it in as long as you still have good slab coverage it will save your home.
3)Inadequate grading clearance (high soil) to exterior wall surface;
Q; why and what does this matter?
A; many reasons-high soil can cause foundation problems, high soil to brick, cement based or wood based siding is a big cause of termite and other insect damage and is always a conducive condition, high soil results in wood rot, covers weep holes so cannot drain properly etc. Also watch and monitor the mulch by your slab. I see mulch piled up high by the slab every day and it’s not good. Think about this, you may hire the yard guy or if your the yard guy you pile another yard around the beds every year or two and after several years its past the slab.
A; IRC code states that Stucco requires a min of 4 inch to earth, 2 inch above paving, brick requires 4 inch from finished ground and all other siding requires 6 inch from ground. Wow, eyeopening because MOST of us do not have this perfect house or yard, however we must maintain our home, repair these issues when noticed to preserve our home.
This is one of the categories overlooked by homeowners and some builders most often and again its diffuciult to have a perfect home/yard to what the codes require, however please attempt to have some reasonableslab showing, a decline away from the slab, no ponding of water (do not overlook underneath a porch or a pier an beam house) because water should not pond there either.
Call if you would like to discuss or have questions or better yet employee a drainage specialist, (if you know you have this problem) to design a plan for your house to properly take water away from these unwanted areas by way of french/corrugated, or underground drainage etc.
Happy St. Patrick’s Day and Happy Spring Break