Build, reinforce, and protect your property with reliable CMU construction
Concrete Masonry Units, or CMUs, are one of the most trusted building materials for homes and businesses across Texas. Known for their strength and flexibility, CMUs are used in everything from block walls to foundations. Whether you’re building new, repairing damage, or upgrading existing structures, CMU delivers lasting performance. Harsh weather, settling, and age can wear down masonry, but with the right team, your investment will stand the test of time.
Southern Texas Group Construction provides expert CMU construction, repair, and restoration services across Austin and surrounding areas. With over a decade of masonry experience, our crew brings precision, consistency, and strong workmanship to every project. From simple retaining walls to structural block systems, we make sure your CMU work is built to last.
Building with CMU requires more than just stacking blocks, it takes careful planning and skilled workmanship to ensure your structure lasts. Every project is unique, and we adjust our methods to meet the specific needs of your property. Here’s how we approach CMU installation and repair to create results that stand the test of time:
Detailed Evaluation
Our process begins with a detailed site inspection, checking soil, drainage, and existing blockwork. For repairs, we look for cracks or weak mortar to design a plan that prevents future issues.
Prep and Demolition
For repairs, our team removes damaged blocks and mortar with precision, protecting the rest of the structure. For new builds, we prepare the ground and footing to provide a strong base for the CMU walls. A clean and level foundation is critical to ensuring the structure remains stable over time.
Block Installation
We install each block carefully, maintaining proper alignment and mortar joints for both strength and appearance. Using high-quality mortar and proven laying techniques, we build walls that can handle heavy loads and hold up in Texas weather conditions.
Reinforcement and Grouting
Where structural support is needed, we reinforce CMU walls with steel rebar and grout the cores for added stability. This is essential for retaining walls, foundations, and load-bearing structures that need long-term durability.
Finishing and Detailing
To complete the process, we apply sealants and protective finishes where required. Proper detailing ensures that moisture stays out, the surface remains attractive, and your CMU work is built to last.
CMU offers more than just strength, it’s a smart solution for long-term building needs. Here’s why property owners rely on CMU construction:
Dependable Strength: CMU blocks handle heavy loads and stand up to tough Texas conditions.
Fire Resistance: Non-combustible blocks add an extra layer of safety to your property.
Sound Control: Block walls help reduce outside noise, creating more comfortable interiors.
Energy Efficiency: CMU provides thermal mass that helps regulate indoor temperatures and lower energy costs.
Low Maintenance: With minimal upkeep, CMU structures remain durable for decades.
Design Flexibility: CMU works for foundations, walls, retaining structures, and decorative features.
Not every project requires brand-new construction. We help you decide the right solution based on your property’s needs and long-term goals:
Repairs and Restorations: Ideal for cracks, spalling, or water-damaged block walls.
Retaining Wall Construction: Build strong, durable retaining walls that protect landscapes and prevent erosion.
Foundations and Load-Bearing Walls: Create solid structural support for new builds or additions.
Custom Designs: Add decorative patterns or finishes for a unique architectural touch.
New CMU Installations: Perfect for ground-up construction or major renovations.
Our team explains each option clearly so you can make an informed choice. We focus on durable, cost-effective solutions that add value to your property.
CMU is one of the most dependable building materials available, but like any system, it can break down over time if not maintained or installed correctly. Over the years, we’ve seen these common issues affect block walls and foundations:
Water Penetration
Without proper sealing or drainage, moisture can seep into blocks, leading to staining, mold growth, or interior wall problems.
Foundation Movement
When the soil beneath shifts or settles, it puts pressure on CMU walls. This often shows up as stair-step cracks or bulging sections that indicate structural stress.
Impact Damage
Even though CMU is durable, it can chip or break when struck by vehicles, heavy equipment, or repeated pressure. These damaged areas create weak spots that spread over time.
Weak Mortar Joints
Mortar is the glue that holds CMU together. If it’s mixed incorrectly or deteriorates with age, the entire wall loses stability, allowing moisture and pests to enter.
Improper Installation
Blocks that aren’t aligned, reinforced, or bonded properly are more likely to crack and fail. We’ve repaired many structures where shortcuts during installation led to early breakdown.
Weathering
Texas heat, rain, and temperature swings can wear down block surfaces. Over years, this leads to crumbling mortar, fading finishes, and weakened joints that require repair.
CMU walls and foundations last for decades, but visible warning signs can signal problems that need immediate attention. Ignoring them often leads to bigger, more expensive repairs down the road. Here’s what to look out for:
Cracks or Fractures
Cracks along mortar joints, vertical splits, or stair-step fractures in blocks are signs of stress. Even small cracks allow water to seep in, weakening the structure over time.
Bulging or Leaning Walls
Walls that bow or lean outward indicate serious structural pressure from soil movement or load stress. These conditions need fast repair to avoid collapse.
Stains and Discoloration
Dark streaks, mold spots, or efflorescence (white powdery deposits) show that water is penetrating the wall. Left untreated, this can cause long-term structural damage.
Loose or Crumbling Mortar
If mortar flakes off or crumbles when touched, the wall has already started losing strength. Gaps between blocks open the door to more water intrusion.
Moisture or Musty Smells Indoors
Water damage in CMU walls can cause odors, damp drywall, or staining indoors. These interior signs often point to hidden block problems behind the surface.
Property owners often weigh CMU against other building materials before starting construction. While every material has its advantages, CMU offers a unique balance of affordability, durability, and flexibility that makes it a popular choice.
CMU vs. Stucco
Stucco is an exterior finish applied over a lath system. While it offers texture and style, it’s not structural. CMU, on the other hand, provides both structural strength and versatility, with stucco often applied over it as a finish layer.
CMU vs. Stone
Stone is a premium material known for natural beauty, but it’s expensive and time-consuming to install. CMU is more cost-effective and can be finished with veneers or coatings that mimic the look of stone at a fraction of the cost.
CMU vs. Wood Framing
Wood is lightweight and easier to install, but it’s vulnerable to termites, rot, and fire. CMU avoids these weaknesses, making it a safer and longer-lasting choice for structural walls.
CMU vs. Other Masonry
Compared to lighter masonry units, CMU offers greater load-bearing capacity, making it the better option for foundations, retaining walls, and high-traffic structures.
Not sure what material is best for your project? Our team walks you through each option, explaining the pros and cons so you can make a choice that matches your goals and budget.
The contractor you choose has a direct impact on the quality and longevity of your project. At Southern Texas Group Construction, we’ve built our reputation on delivering dependable craftsmanship for homeowners, businesses, and developers across Texas.
Our team installs traditional and modern stucco finishes that are durable, weather-resistant, and designed to complement any property.
We provide Exterior Insulation and Finish Systems that improve energy efficiency while giving your building a sleek, modern look.
From structural walls to decorative brickwork, we deliver strong, clean, and visually appealing results.
We create custom stonework for facades, walkways, columns, and accents that add natural strength and beauty.
We handle all forms of masonry, including flatwork, block features, and decorative designs tailored to your property.
We build office spaces, retail centers, warehouses, and other large-scale projects with precision and efficiency.
From block fences to full exterior upgrades, we deliver solutions that improve curb appeal, safety, and value for homeowners.
Our in-house team manages every phase of construction, avoiding delays from subcontractors and ensuring consistent quality. We proudly serve Austin, San Antonio, Dallas, Houston, and surrounding communities including Buda, Kyle, Round Rock, Cedar Park, Georgetown, Pflugerville, San Marcos, Leander, and Lakeway. Wherever your project is located, you can count on us for results that last.
With proper installation and care, CMU structures can last for many decades without major repairs.
Yes, blocks come in various styles and finishes, and we also offer custom design work to enhance curb appeal.
Absolutely, our team manages everything from small block repairs to full-scale commercial builds.
Most structural projects do require permits, and we’ll take care of that process for you.
Once the estimate is approved, most projects can begin within 2 to 3 weeks depending on material availability.
If your property needs reliable block construction, Southern Texas Group Construction is here to help. Our expert CMU team delivers solid structures, lasting protection, and unmatched quality.
Call us today or use our online form to schedule your free estimate. We’re proud to serve Austin and surrounding Texas cities with CMU solutions built for strength and performance.
Building Texas with precision, expertise, and unmatched dedication to quality.