Follow the steps below to build a dry-stacked concrete block wall using QUIKWALL.

    When working with cement-based products, always wear eye protection and waterproof gloves.

    1. Begin constructing a footing slab. Once the footing cures, dry-lay the first block row atop the footing and chalk mark block positions using a level and Mason’s line for precision.
    2. Remove the blocks and apply a 1/2-inch bed of prepared surface bonding cement on the footing to bond the first course and correct irregularities.
    3. Place the first row, embedding each block in the mortar bed to a 3/8-inch final thickness. Remove excess material.
    4. Check alignment and level after placing every three to four blocks.
    5. Continue dry-stacking the remaining blocks in a running bond pattern to the desired height.
    6. Add a cap block to the top course. For more strength, fill cavities with QUIKRETE® Sand/Topping or Concrete Mix.
    7. After misting, apply a 1/8-inch coating of surface bonding cement to wall sides, top, and exposed ends using a trowel. Texture as desired.
    8. Moist cure after eight hours by misting. Repeat daily for three days.

    To learn more, visit www.quikrete.com.


    Benefits of Concrete Block Walls

    Concrete block walls provide durable, sturdy material for home projects like foundations, retaining walls, garden walls, and DIY storm shelters. The interlocking blocks enable solid construction without complex framing. Blocks resist termites, rot, rust, and fire better than wood.

    Blocks made with gravel or stone have excellent thermal mass to insulate against temperature changes. Interior blocks also provide fire protection. In storm zones, concrete block walls meet ‌Federal Emergency Management Agency (FEMA) wind shelter standards.

    Installing block walls requires concrete footings but not advanced masonry skills. Blocks stack together without mortar and can withstand over 8,000 pounds per linear foot, exceeding common code. Wall height depends on footing size.


    Planning Concrete Block Wall Projects

    Careful planning makes sure block walls meet codes and support intended loads. Determine length and footing width based on the desired wall height.

    Today’s Homeowner Tips

    Map the layout before purchasing materials. Calculate blocks needed for total linear footage.

    Experienced DIYers estimate 28 blocks per 100 square feet. Include extra for trimming and waste.

    For load-bearing walls, make the footing depth half the wall height to distribute pressure. Use deeper footings on slopes or soft soils. Walls over 4 feet tall may require an engineer’s approval.


    Building a Concrete Block Retaining Wall

    Follow these steps to build a freestanding retaining wall under 3 feet

    1. Dig a 10–12-inch wide trench the length of the wall. Depth varies by soil. Slope the trench bottom away from the wall side.
    2. Fill with a 4-inch gravel base and 8 inches of concrete to make the footing. Level and allow to cure for 24 hours.
    3. Dry lay the first course tight to the footing. Shim to level and mark positions.
    4. Sweep debris and apply QUIKRETE® Surface Bonding Cement. Coat intersecting block ends.
    5. Set the first course, fully embedding blocks. Check alignment every few blocks.
    6. Stack each course in a running bond pattern. Backfill behind the first row before adding the second.
    7. Every 2–3 rows, reinforce with concrete in cores and rebar over 3 feet tall.
    8. Coat the top with QUIKRETE® Surface Bonding Cement, sloped 1/4 inch toward the wall’s rear.

    Finishing Concrete Block Walls

    Concrete block walls can be left exposed or finished with various decorative techniques. Here are some common options:

    Add pea gravel to a concrete cap pour. Pressure wash when cured to reveal aggregate.

    Adhere faux stone veneer panels with construction adhesive. Use fall protection over four feet high.

    Apply stucco with acrylic bonding additive and metal lath fastened to the wall.

    Masonry paint adds color. Use elastomeric paint for flexibility and prime first.

    Install wood boards horizontally along the wall length. Allow rear ventilation.

    For retaining walls, prevent freezing moisture damage with coatings or drainage. Get product recommendations from home centers.


    Is a Concrete Block Wall Right for Your Project?

    Concrete block walls like QUIKWALL allow DIYers to build walls with the strength of poured concrete without advanced masonry skills. The interlocking blocks that you install without mortar meet FEMA criteria for storm shelters.

    However, the modular block design has an industrial look suitable for foundations and some garden walls. For a refined appearance on highly visible walls, other finishes like stone veneer or stucco may be preferable. Homeowners who want long-lasting walls but maximum style flexibility in the future may wish to explore other options. Building codes also limit freestanding block wall height.

    Consider your project goals, wall location, and aesthetic tastes when deciding if a concrete block wall is the right choice. An experienced mason can also provide guidance.


    Get Your Estimate From a Professional Home Builder
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    FAQs About Concrete Block Walls

    Can concrete blocks be used for exterior house walls?

    Yes, properly supported blocks like QUIKWALL meet the code for exterior walls. Fully grout cores and install vertical steel at 48 inches on center. Finish over blocks with stucco, siding, etc.

     


    What are the best concrete blocks?

    Blocks with uniform architectural faces work best. Hollow-core blocks are lighter and better insulated than solid. Look for high 4,000+ PSI strength rated for retaining walls and foundations with integral water repellents.


    How long until concrete blocks fully cure?

    Blocks cure in 1–3 days. However, allow 28 days to reach maximum strength before backfilling retaining walls or foundations.


    Can you paint concrete blocks?

    Yes, blocks accept masonry paint. Smooth architectural faces need less coating than textured, split-face blocks. Include expansion joints in painted walls to control cracks.


    What is the best concrete block wall thickness?

    Single 8-inch width works for freestanding garden walls. Structural and retaining walls over 4 feet tall require a 10–inch minimum thickness per code. Stack double wythe with overlapping block joints.


    Editorial Contributors
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    Jonathon Jachura

    Contributor

    Jonathon Jachura is a two-time homeowner with hands-on experience with HVAC, gutters, plumbing, lawn care, pest control, and other aspects of owning a home. He is passionate about home maintenance and finding the best services. His main goal is to educate others with crisp, concise descriptions that any homeowner can use. Jon uses his strong technical background to create engaging, easy-to-read, and informative guides. He does most of his home and lawn projects himself but hires professional companies for the “big things.” He knows what goes into finding the best service providers and contractors. Jon studied mechanical engineering at Purdue University in Indiana and worked in the HVAC industry for 12 years. Between his various home improvement projects, he enjoys the outdoors, a good cup of coffee, and spending time with his family.

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    Casey Daniel

    Casey Daniel is a writer and editor with a passion for empowering readers to improve their homes and their lives. She has written and reviewed content across multiple topics, including home improvement, lawn and garden care, sustainability, and health and wellness. When she’s not reviewing articles, Casey is usually playing board games, repainting her bathroom, or quilting.

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