ADU FOUNDATIONS

SERVICE OVERVIEW


M&M Concrete Inc. provides expert ADU excavation, site preparation, concrete foundation, and slab services for homeowners, builders, general contractors, and developers. If you are planning an Accessory Dwelling Unit, we deliver the essential groundwork needed to prepare the property and create a strong, stable base for construction.


We perform professional ADU site work including excavation, grading, foundation preparation, concrete foundations, slab pouring, and flatwork for a wide range of residential projects. From detached ADUs and backyard units to guest houses, granny flats, and in-law suites, our team focuses on precision, durability, and dependable project execution every step of the way.


At M&M Concrete Inc., we understand that every successful ADU project starts with proper site preparation and quality concrete construction. That is why we are committed to providing trusted ADU concrete contractor services that help support lasting results, improve project efficiency, and give clients confidence in the foundation of their new living space.

Our ADU Excavation, Foundation & Slab Services Include:

  • Site preparation for Accessory Dwelling Unit (ADU) projects
  • Residential excavation and grading for ADU construction
  • Concrete foundation work for detached ADUs and backyard units
  • ADU slab installation with reinforced concrete and proper preparation
  • Reliable sitework services for homeowners, builders, and general contractors

Whether you're building a detached ADU, backyard unit, guest house, or in-law suite, MM Concrete Inc. provides dependable site preparation, excavation, grading, concrete foundation, and slab installation services designed to help your project start on solid ground.


Serving San Bernardino and surrounding areas, we work with homeowners, general contractors, builders, and developers to deliver quality ADU foundation services with durability, precision, and reliable workmanship. Our team is committed to completing the groundwork and concrete phases of your Accessory Dwelling Unit project with attention to detail and long-lasting results.



Contact us today to learn more about our ADU excavation, sitework, concrete foundation, and slab services and see how MM Concrete Inc. can help prepare your property for a successful ADU build.

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POPULAR QUESTIONS


  • Are you licensed and insured?

    Yes, M&M Concrete is fully licensed and insured. We understand the importance of ensuring your concrete project is handled by a professional team you can trust. As a licensed concrete contractor, M&M Concrete meets all local regulatory requirements and adheres to industry standards, guaranteeing safe and reliable service. Our comprehensive insurance coverage protects both our team and your property, giving you peace of mind throughout the duration of the project. Choose M&M Concrete for your next concrete installation or repair and know that you're working with a fully licensed, insured, and trusted concrete contractor.

  • What does an ADU foundation actually include?

    Concrete work requires knowledge and skill. There are fundamental skills that the average homeowner does not have. Some basic skills that are required are using a hammer, chalk lines, and saws; however, more specialized skills include the use of straightedge, a concrete edger, a hand float and others.


    Besides the use of tools, other areas of expertise include site excavation, preparing the subgrade, putting in concrete form. These areas and the work of placing and finishing concrete is very difficult work. Also, concrete is quite heavy and the timing of the finishing of the project is critical. For all of these reasons and more, most homeowners feel that it is necessary to hire a concrete contractor to do their concrete project.

  • Do you work from the engineer's plans?

    The recommended time can be any time from three to seven days depending on the load that will be on it. Ask your concrete contractor for specific directions on when your driveway can be put back in service.

  • How long does an ADU foundation take?

    Can it be too hot or too cold to place concrete?


    Yes, both extreme heat and cold can significantly affect the quality and durability of concrete. At M&M Concrete, we take weather conditions seriously and adjust our procedures to ensure that your concrete installation is completed correctly, regardless of the temperature. Here's how temperature can impact your concrete project:


    1. High Temperatures (Hot Weather)

    In hot weather conditions (typically above 85°F or 29°C), concrete can set too quickly, leading to several potential issues:


    Faster Curing: Concrete may begin to cure and harden too quickly, which can result in weak concrete, reduced strength, and potential cracking.


    Uneven Finishing: The surface may dry too fast before finishing work can be completed, leading to imperfections and a less smooth surface.


    Crazing or Surface Cracking: Rapid evaporation can cause the surface to crack and create a condition known as crazing, which can negatively affect the look and longevity of the concrete.


    How We Manage Hot Weather:


    Use of Retarders: We may add chemical retarders to slow the curing process.


    Cooler Materials: Using cooled water or aggregates can help manage the temperature of the concrete mix.


    Frequent Watering: During the curing phase, we might apply a mist or water to keep the surface moist and prevent rapid evaporation.


    Time of Day: Pouring concrete during cooler parts of the day, such as early mornings or evenings, can help mitigate the effects of high temperatures.


    2. Low Temperatures (Cold Weather)

    When the temperature falls below 40°F (4°C), concrete curing is slowed significantly, which can lead to several issues:


    Delayed Strength Gain: Cold temperatures slow down the chemical reaction that hardens the concrete, which means it may take longer to reach its full strength.


    Risk of Freezing: If the concrete freezes before it has properly cured, it can cause permanent damage to the mix, leading to weakened concrete and potential cracking.


    Surface Damage: Frost or ice on the surface can result in scaling or deterioration.


    How We Manage Cold Weather:


    Heated Materials: We may use heated water or aggregates to prevent the mix from getting too cold.


    Insulation and Blankets: After pouring, we use insulating blankets or other methods to keep the concrete warm and protected from freezing.


    Curing Accelerators: Special additives can be used to speed up the curing process and help the concrete gain strength more quickly in cold weather.


    Post-Pour Care: We may take extra care in covering and protecting the concrete during the curing phase to ensure it doesn't freeze.


    Best Temperature Range for Concrete

    Ideally, concrete should be poured when the temperature is between 50°F (10°C) and 85°F (29°C). Within this range, the concrete will cure at the right rate, achieving optimal strength and durability.


    At M&M Concrete, we monitor weather conditions closely and adjust our techniques to ensure that your concrete project is completed with the highest standards of quality, regardless of the season.

  • Do you handle the excavation and grading too, or just the concrete?

    At M&M Concrete, we understand the importance of preserving your property during the demolition phase of any concrete project. While demolition is a necessary part of many concrete jobs, we take every precaution to minimize damage to your existing landscaping, structures, and surroundings.


    Our experienced team uses professional equipment and techniques to carefully remove old concrete without causing unnecessary harm. In many cases, we can target specific areas for removal while leaving adjacent surfaces intact. We also take steps to protect your lawn, plants, and any nearby structures with barriers and protective materials.


    That being said, some minor disturbance or wear may occur, especially in areas where the existing concrete is tightly integrated with landscaping or other features. We will discuss potential risks with you before starting the demolition and work with you to minimize any impact.


    We take pride in our clean-up efforts and strive to leave your property as neat and damage-free as possible. If you're concerned about potential damage, we're happy to provide guidance and take extra measures to ensure the best possible outcome.

  • Do I need a permit and inspections for an ADU foundation?

    Yes on both. An ADU is habitable space, so it is permitted construction everywhere in California and the foundation gets inspected before you pour - typically the footing trench and the rebar, sometimes the vapor barrier too. Your designer or engineer normally pulls the building permit as part of the ADU package. We build to the approved plans, call for the inspections, and are on site to meet the inspector so nothing gets red-tagged over a detail we could have handled.