Signs of Foundation Problems in New Braunfels

What cracks, sticking doors and sloping floors usually mean, and why the ground under New Braunfels makes them more common.

Get a price from a local pro

Free to use
One local company, not a list
No obligation to hire

Referral website, not the contractor. How it works

The most common signs of foundation problems in New Braunfels are sticking doors, diagonal drywall cracks, stair-step cracks in brick, sloping floors and gaps between the soil and the slab. To have a local company look, send a request with the form.

New Braunfels Foundation Co. is a referral website, not a foundation repair company. We send your request to one independent local foundation repair company. You never pay us; companies we refer you to may pay us for referrals.

No single crack proves a foundation has failed. What matters is the pattern: several signs in the same part of the house, or signs that get worse over weeks and months.

The building official's warning signs

In a 2023 Community Impact story, KC Collins, a building official for the City of New Braunfels, listed signs of possible foundation issues:

uneven flooring
gaps between the ground and the foundation
broken tiles
cracks in the soil, the exterior foundation or interior walls

Signs inside the house

What you notice	What it often means
Doors that stick, won't latch, or swing on their own	The door frame has racked out of square as the floor moved
Diagonal cracks from the corners of doors and windows	Stress concentrating at openings as walls shift
Gaps where walls meet the ceiling, or trim pulling away	One part of the house moving relative to another
Cracked or popped floor tile	The slab beneath has cracked or flexed
Floors that slope, dip or feel bouncy	Settled slab, or (pier and beam) failed piers or beams
Windows that bind	Same racking as doors

Signs outside the house

Stair-step cracks in brick or mortar. Brick can't flex, so movement shows up along the mortar joints.
Cracks in the exposed slab edge, especially near corners.
A gap between the soil and the foundation. A New Braunfels landscaper told Community Impact that if you see a gap between your dirt and your foundation, "you're too dry" and need to get water around the foundation.
Soil cracks. USDA says Houston Black clay can crack half an inch to 4 inches wide in dry periods.
Water that pools against the house after rain.

Which cracks are normal

This Old House notes that cracks in concrete slab foundations are common and don't always point to serious problems. HomeAdvisor says cracks wider than 1/8 inch are cause for concern and may mean a structural problem.

A simple way to tell if a crack is growing: mark both ends with a pencil, write the date beside it, and photograph it next to a ruler. Check again in a month or two. Growing cracks, and new cracks appearing nearby, are reasons to call.

East side vs. west side: why the ground matters

New Braunfels is split by the Balcones Escarpment. The Texas State Historical Association describes the escarpment as a fault zone several miles wide that separates the Edwards Plateau from the coastal plains, and says Comal County sits "on the divide between the Blackland Prairies and the Balcones Escarpment."

East of the escarpment. TSHA describes Comal County's eastern quarter as Blackland Prairie with clay subsoils. Texas Parks and Wildlife describes Blackland soils as dark alkaline clays "often referred to as 'black gumbo.'" USDA lists Houston Black, a typical Blackland clay, as having "high shrink-swell potential." This is the ground that swells after rain and shrinks in drought, and it's where a local foundation company told Community Impact it sees the most demand.

West of the escarpment and around Canyon Lake. Texas Parks and Wildlife says Edwards Plateau soils are "usually shallow" and "underlain by limestone." There's less clay to swell, but slopes, uneven rock and fill pads can still leave part of a house unevenly supported.

The city's building official summed it up: New Braunfels soils range "from rocky and stiff soils to clay and highly expansive soils." To see the mapped soil under your own lot, look up your address on USDA's Web Soil Survey.

What makes the signs show up

Drought. The building official said the drought that "started in October of 2021" brought record foundation repairs to Central Texas in 2022.
Heavy rain after a dry spell. Dry clay swells as it takes water back, often unevenly.
Plumbing leaks. A New Braunfels plumber explained that a leak under the house wets the soil and can lead to shifting.
Hard freezes. During the February 2021 winter storm, the National Weather Service recorded 5.5 inches of snow in New Braunfels. Freezes and drought can both shift soil and break pipes, according to the plumber quoted by Community Impact.

What time of year is best for foundation repair?

None of our sources names a best season. HomeAdvisor warns that the longer foundation damage goes unrepaired, the worse and costlier it gets, so waiting for a particular month while a crack grows has a cost. If you have a choice, get the house evaluated when you first notice the signs, and ask the company whether current soil conditions affect its plan or timing.

What you can do now

Photograph and date every crack, with a ruler for scale.
Note which doors stick and when it started.
Keep moisture around the slab steady. New Braunfels Utilities currently allows foundation watering for up to two hours on any day, during allowed hours, by handheld hose or by soaker hose or drip line within 24 inches of the foundation. Check NBU's current stage first.
Make sure gutters discharge away from the house.
If you suspect a leak, call a plumber.
Have the foundation evaluated. Our foundation inspection page explains the options.

Where to go next

Concrete slab with cracks: slab foundation repair
Crawl space and sagging floors: pier and beam foundation repair
What it might cost: the foundation repair cost guide

Sources (10)

Last updated 2026-10-23