Watering a Foundation Through a Fort Bend Drought

Most of the ground around Sugar Land is clay that grows when wet and shrinks when dry. Brazoria clay, on the Brazos River bottom, reads 17 on the USDA's shrink-swell scale. Lake Charles clay, on the prairie, reads 13.6 and cracks up to 2 inches wide in a dry spell.

When one side of a house dries out faster than the other, that side of the slab can drop. The Foundation Performance Association, a Houston-area group of engineers and repair firms, sums up the fix in four words: "Uniformity is the key." The ASCE Texas guidelines agree that keeping the moisture near even on all sides "may be beneficial." They add a caution against watering too much.

On the Katy terrace, around Katy and Cinco Ranch, the soil is sandier on top and moves less. Even moisture still helps there, but leaks and drainage usually matter more.

There's no set schedule that fits every house, and no source we trust gives one. Watch the ground instead. The Foundation Performance Association advises watering only in dry periods, when the lawn and plants start to wilt.

The weather gives you a rough calendar. At all 11 NOAA stations we checked around Sugar Land, July gets less rain than both June and August. July and August are also the hottest months, with average highs near 94°F at the Sugar Land station. That stretch is when clay dries fastest. Winter is the driest season by rainfall, but the heat is gone, so the soil loses less to the sun.

The Houston engineers' maintenance guide is specific about method:

• Water a foot or two out. Apply water at least 1 to 2 feet from the slab, and lightly, so tree roots aren't drawn toward the house.
• Don't fill the gap. If the soil cracks and pulls away from the slab in a long dry spell, don't pour water straight into the gap.
• Keep sprinklers off the house. Spray shouldn't hit the walls.
• Cover the ground. Use mulch or another ground cover reaching at least 5 feet out from the foundation.
• Don't trap water. Avoid metal edging or anything that dams water within 5 feet of the slab.
• Move roof water away. Downspouts should carry water at least 5 to 10 feet from the house.

The ASCE Texas guidelines add a slope rule: the ground should fall at least 6 inches over the first 10 feet out from the house.

Soaker hoses and drip lines

The same group weighs the tools. Soaker hoses put water down more slowly than sprinklers and are the easiest to install.

But they can cause uneven, excessive moisture, wear out early, and draw roots toward the foundation if laid around it. Burying them cuts evaporation. For drip systems, it recommends a moisture meter. Because water can be rationed in a drought, it also suggests a soil moisture sensor with automatic controls.

A mature shade tree can draw the moisture out of the clay under a corner of the house. The Houston maintenance guide suggests keeping broadleaf trees, such as oak, ash or pecan, no closer to the foundation than the tree's height. It recommends pruning every 2 to 3 years to hold the canopy in check.

Removing a big tree has its own risk. The ASCE Texas guidelines warn that the soil can swell back once the tree is gone, especially if the tree is older than the house. Trimming the canopy is often gentler than cutting the tree down. The guidelines point homeowners to an experienced arborist for that call.

This is the part people miss. Your rules come from whoever supplies your water, and that's often not your city. Fort Bend County says it doesn't provide water at all and sends residents to their water bill. Katy says its rules cover City of Katy customers only. Many homes around Sugar Land are served by a municipal utility district, or MUD, with its own plan.

So the first step is simple: look at your water bill and find the supplier's name. The rules below belong to that supplier, not to the town on your mailing address. Regional water authorities and the Fort Bend Subsidence District set no household watering days.

In Fulshear's Stage 2, foundations may be watered only on your designated day, outside 9 a.m. to 7 p.m. Allowed tools then are an attended hand-held hose, or a soaker hose or drip line laid inside 24 inches of the slab with no spray above ground. The plan doesn't say whether Stage 3 allows it.

In these plans, a foundation is treated like any other part of the yard, and the strictest stages ban outdoor watering:

• Missouri City (2025): hand watering on your designated days in Stages 2 and 3; Stage 4 bans lawn and garden watering.
• Rosenberg: hand watering any time in Stage 2, on your days and hours in Stages 3 and 4, and not at all in Stage 5.
• Manvel: hand watering any time in Stages 1 and 2, on your days and hours in Stages 3 and 4, and banned in Stage 5. This covers city water customers only.
• Iowa Colony: the city's posted 2024 plan allows hand watering any time in Stage 2 and bans lawn and garden watering from Stage 4.
• Pecan Grove MUD (2013): no hand-held exception; all outdoor use is limited to two days in Stage II and banned in Stage III.
• Fort Bend County MUD 81, Weston Lakes (2019): no hand-held exception; outdoor use is limited to two days a week from the first stage, with 6 to 10 a.m. and 6 to 10 p.m. banned, and stopped entirely in the severe stage.
• Cinco MUDs 7 and 12: a voluntary mild stage starts every June 1, so a summer notice is routine. Hand watering is allowed any time in the moderate stage, then limited, then banned in an emergency.
• North Mission Glen MUD (2024): hand-held hose only in the moderate stage; all outdoor use banned in the severe stage.

If your supplier follows a plan like these, the time to keep the soil even is early in a drought, on your allowed days, before the top stage arrives.

We couldn't find posted drought rules for Stafford, Meadows Place, Arcola, Needville, the utility districts around Fresno and Cumings, or the Sienna utility districts. Pearland's current full plan wasn't online either. In 2023 the city asked residents not to let foundation watering run into the street. If you live in one of these places, call the supplier on your bill.