Drainage Slopes

BEFORE THE ARCHITECT – CUSTOM HOME DESIGNING BACKGROUND – HOUSE DESIGN ARTICLES

ALL ABOUT HOUSE FOUNDATION PROBLEMS and YOUR HOME DESIGN FOUNDATION PLAN CONCRETE DRAINAGE SLOPES

YOU MAY FREELY QUOTE THE AG WITH PROPER ATTRIBUTION

When is it overprepared? When the collective of home designers/home builders since the ‘60s and clients run out of stuff to worry about, while holding a full bag of experience – vicarious and real – strategies, and tactics to deal with what they didn’t know that they didn’t know. Before The Architect

QUESTION: WHASSUP WITH HOUSE FOUNDATION PROBLEMS?

ANSWER: PRETTY NEAR NOTHING WITH A GOOD HOME FOUNDATION PLAN.

What About Home Foundation Concrete Drainage Slopes?

Comment: Home foundation concrete drainage slope for runoff and below-grade water pose primary concern for lots of folks. Loss of property and health get involved. This subject is fundamental to the safety of a home’s occupants and, to an extent, their property. These drainage slope guides present aspects for your consideration.

Drainage slope for exterior finished grade level by foundation walls and columns

2 linear feet per 10 linear feet

	Evenly, uninterruptedly, and overall down and away from foundation structures
	To not less than 10 linear feet from such structure, then

1-2 linear feet per 10 linear feet

	Evenly, uninterruptedly, and overall down an away from foundation structures
	To not less than 20 linear feet from such structure

In all, drainage slope from the house structure need not exceed 20 linear feet in all directions in most instances

Drainage slope for exterior slabs-on-grade slope (including covered porches, screened porches, exterior steps, open porches, patios, etc.)

	1/4 linear inch per linear foot
	Evenly, uninterruptedly, and overall down and away from exterior walls

Drainage slope for garage floor

	1/8 linear inch per 1 linear foot
	Evenly, without interruption, and overall downward toward a floor drain or
	Evenly, without interruption, and overall downward from garage head to foot, toward the exterior

Drainage slope for laundry room floor slope (if it suits you)

	¼ linear each per 1 linear foot
	Evenly, without interruption, and overall downward toward a floor drain

Drainage slope for tiled baths

	¼ linear inch to ½ linear inch per 1 linear foot
	Evenly, without interruption, and overall downward toward a floor drain

Drainage slope for driveway

	Not less than ¼ linear inch per 1 linear foot
	Evenly, without interruption, and overall from driveway head, i.e., throughout a driveway’s run
	Possibly requiring a drain sump – passive or mechanical – along the way
	Possibly requiring a crown
	Possibly requiring a full-width tilt once away from the driveway head not less than 20 linear feet
	Possibly requiring slope on width rather than on length along the way

Drainage slope for brick paver deck and walkway slope (and walkways in general)

	1/8-1/4 linear inch per 1 linear foot
	Evenly, without interruption, and overall downward and away from structure

Drainage slope for mud shower floor slope

¼ linear inch per 1 linear foot

Evenly, without interruption, and overall toward a floor drain

	Receptor preferred
	No ponding water

A foundation top of face, including piers, stem walls, and similar, shall not be less than 6 linear inches over finish grade

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