03/10/2017
Grading and Drainage
One of the most important aspects of maintaining foundations in north Texas is the control of water. Nowhere is proper lot drainage more important than areas such as in north Texas, where homes are constructed on expansive clay soils. Proper foundation performance demands that soil moisture be controlled and moisture equilibrium be maintained under and around not only slab-on-grade foundations but also with pier-and-beam foundations.
When our soils absorb water, they increase in volume. And the soil’s volume decreases with drying. Expansions and contractions of 10 to 25% are not uncommon. This change in volume, can exert enough force on the foundation can cause significant and costly damage.
Grading
The first step in controlling water is to have and maintain proper slope around your home. Grading should be no less than 6 inches for 10 feet & Always away from the home .
Some common problem areas include flower beds. Flower beds cut in below the original grade or flower beds with solid brick or stone borders can capture and retain runoff.
Some homes are lots are lower than adjoining residences. Drainage in these areas can present additional challenges some of which can only be resolved by surface drainage systems which include surface drains or receptors. These underground systems do require some maintenance to keep the receptor grates clear
Gutters
Gutters are highly recommended for the entire home. Even on homes which have sufficient grading, gutters control large amounts of runoff from the roof and they reduce erosion around the home.
Many homes have no gutters or partial gutter systems. A properly designed and installed gutter system is essential.
The most common issue with gutter systems is the downspouts discharging at the foundation. Gutters must be installed to drain away from the home. Ideally, they should discharge 5 feet from the foundation.
Although it is not the best option some people prefer to use a splash block to effectively absorb impact and spread out water drainage. The splash block prevents the water from eroding deep crevices in the ground upon impact and spreads the water flow. If using splash blocks it is important they be properly sized and placed in a position that catches all drainage and directs it away from the home in a manner which will prevent erosion.
Provided by the CCAR Inspector Committee helping fulfill our Mission to provide professional, informative and dedicated services and support to CCAR by creating a successful partnership with the REALTORS and associates, coordinated leadership, training, and respect for each other.