Concrete Questions and Answers for Waco, TX Property Owners

Ready-mix is sold by type and by strength. Typical Central Texas prices for 2026 run from all-purpose concrete at $120 to $165 a cubic yard through shotcrete, high-strength, modern and self-consolidating mixes to limecrete at $195 to $205. By strength, typical Waco 2025 prices are listed for 3,000, 4,000 and 5,000 psi concrete. TxDOT sorts its concrete into classes: Class A, the general class it uses for curb, gutter, sidewalks and driveways, is designed for at least 3,000 psi, and Class P is its pavement concrete.

Under a house, yes. Waco's residential permit rules put a 6-inch sand base under a house slab, topped by a 6 mil polyethylene vapor barrier, and NRMCA's recommendation for interior slabs is a vapor retarder 10 mils thick or more. Outdoors it's different: NRMCA says vapor retarders generally aren't needed under exterior slabs on grade, and the 2015 International Residential Code doesn't require one for garages, utility buildings and other unheated accessory structures.

A compacted base on firm ground, at least 4 inches of base and subbase together. ACI 302's recommendation is a granular material that compacts, with 10 to 30% fines and free of clay, silt and organic matter. Where the soil is expansive, like the clayey upland soils that cover about 26 percent of McLennan County, one published guide calls for 2 to 8 inches of crushed rock as subgrade, depending on how expansive it is, with soft spots dug out and replaced. At the curb, the City's residential approach detail puts 4 inches of base material under the concrete.

Control joints, also called contraction joints, are cut or tooled grooves that give the slab a place to crack. NRMCA's minimum groove depth is a quarter of the slab thickness, and never under 1 inch, with the panels between them close to square and never longer than 1.5 times their width. Isolation or expansion joints run the full depth instead and separate a driveway or patio from sidewalks, garage slabs, stairs, light poles and other fixed points, so each part can move on its own. Wire mesh doesn't prevent cracking, NRMCA adds; what it does is help hold cracks and joints closed.

Inside the city, a driveway, patio or other flatwork on private property doesn't, but anything in the right-of-way does: a drive approach, public sidewalk or curb needs its own Engineering Department permit, apart from any building permit. Inspection Services adds a few cases that involve concrete. A retaining wall over 48 inches must be engineered and needs a Foundation permit, anything over 200 square feet built as an accessory structure takes a Residential Accessory Structure permit, and decks and covered porches count as Residential Additions. Our guide to Waco driveway, approach and sidewalk permits walks through the right-of-way rules.

Some do and some don't, so go by the city your address is in. Lacy-Lakeview names driveways and sidewalks on its list of projects needing a permit. Robinson's permit page names pools deeper than 24 inches, decks over 200 square feet or 30 inches high, and fences and retaining walls, with engineered plans for walls over four feet, but not driveways, sidewalks or flatwork, though a stand-alone drive approach permit and inspection there costs $75.00. Woodway's fee schedule, effective October 1, 2026, charges $100.00 per drive approach, and Bellmead's right-of-way permit for a driveway, sidewalk, curb or street construction is $50. Waco Elite Concrete checks which city's rules apply at the free estimate.

In infill areas, it can. The City's code requires a sidewalk when an infill lot next to an existing sidewalk is developed, and it makes the developer, owner or builder repair or replace an existing infill sidewalk that's in disrepair, which the code describes as "excessive cracking or significant vertical displacement at joints or cracks". New walks must be at least 6 feet wide along arterial streets and 5 feet along collector streets, each with a 4-foot planting strip. Our page on concrete sidewalks and walkways covers the rest of the City's sidewalk details.

It depends on what the damage is doing. A spall that stays in the top third to half of the slab without exposing steel can take a partial-depth patch, but no partial-depth repair fixes a crack running through the full slab. A slab that has sunk can be raised by slabjacking, though if a cause such as roots or a leaking pipe washing out the ground underneath is found, replacing the slab may be the only fix. Deep or wide cracks with one side higher than the other can signal settlement and unstable ground rather than a surface problem, and once a driveway passes about 30 years, full replacement is usually the better choice. Waco Elite Concrete looks at the slab and the ground under it before recommending concrete repair, leveling or a new pour.

For outdoor flatwork, one published guide says yes: a high-quality sealer every few years helps keep moisture out. The American Society of Concrete Contractors treats decorative sealer as a sacrificial coat, and its rule of thumb is a fresh coat every 2 to 3 years where traffic and sun are heavy and every 4 to 5 years on lighter-use and indoor areas. Heat matters here: ASCC's window for water-based sealers is 45°F and rising, up to 90°F, for both the air and the concrete, and Waco's normal July high is 96.7°F. National 2025 figures put cleaning and sealing at $1 to $3 per square foot. Our page on concrete resurfacing and sealing covers sealer types and overlays.

Not right away. Most manufacturers recommend applying the final sealer several weeks after stamping, after a light surface cleaning, and the American Society of Concrete Contractors' sealer guide counts leftover release on the surface as "one of the biggest reported sealer problems". After that, plan on resealing every two to three years; typical Central Texas figures (2026) put each round at roughly $1.20 to $2.50 per square foot. Our stamped concrete page covers patterns, colors and upkeep.

With care, decades. One published guide puts a concrete patio at 30+ years and a sidewalk at 20 to 40 years, and says an interior concrete floor can last indefinitely when it's properly installed and sealed. The ground is the variable in Waco: for soils the USDA survey rates "Very limited", such as Houston Black clay, it expects poor performance and high maintenance unless special design or installation overcomes the limits.