The Montgomery Concrete Calculator helps homeowners, contractors, and builders estimate cubic yards, bag count, and ready-mix costs for any concrete project in Montgomery, AL. Montgomery pricing typically runs $97–$109/yd for ready-mix delivered — among the most affordable in the Southeast due to Alabama's lower labor and materials costs. Montgomery's key concrete considerations are hot humid summers, expansive red clay soils, occasional winter freezes, and heavy rainfall that demand proper drainage, subbase prep, and adequate mix strength for long-term durability. Enter your dimensions below for instant, Montgomery-accurate results. Explore more free tools at Concrete Toolkit.
🏛️ Montgomery Concrete Calculator
🏛️ Montgomery AL Pricing · CLSB Licensed · Montgomery County
Enter your project dimensions to calculate volume, bags needed, and estimated Montgomery AL material cost.
Residential driveway: 4 in. min, 3,000–3,500 PSI. No air entrainment required. Montgomery County permit required for new construction.
Sidewalk 4 in · Driveway 4–5 in · Patio 4 in · Foundation 6–8 in
Cubic Yards Required
—
Including waste factor
📋 Project Summary
💵 Montgomery AL Cost Estimate
📐 Montgomery AL Driveway Cross-Section — Standard Layers
Broom Finish — Montgomery AL Standard
Concrete — 4–5 in. (Montgomery AL Driveway) 3,000–3,500 PSI · Wire Mesh or Rebar · Low Slump Recommended in Summer Heat
⬛ Wire Mesh / Rebar — Required Over Montgomery Expansive Red Clay Soils
🪨 4–6 in. Compacted Gravel / Crushed Stone Base (Critical for AL Clay Subgrade)
Compacted Subgrade — Montgomery Red Clay / Expansive Alabama Soil
27
Cu ft per cubic yard
45
80 lb bags per cu yd
$103
Avg Montgomery ready-mix / yd
Concrete SlabRebar / MeshGravel BaseClay Subgrade
Montgomery Concrete Calculator — What You Need to Know
Montgomery is the capital of Alabama and sits in the heart of the state's humid subtropical climate zone. Unlike northern cities, Montgomery has a very shallow frost depth of only about 16 inches, so foundation depth requirements are much less demanding than in the Midwest or Northeast. However, Montgomery's expansive red clay soils, heavy summer rain, and high temperatures regularly reaching 97°F create unique challenges for concrete longevity. The Alabama Contractors Licensing Board (CLSB) licenses all general and specialty contractors in the state — verify any contractor at gencontracts.alabama.gov. Montgomery City-County permits concrete work through the Building Inspection Department at (334) 625-2115.
🔵 Montgomery AL Minimum Concrete Requirements
Driveways & Flatwork: 3,000–3,500 PSI min, no air entrainment required · Foundations: 3,000 PSI min per IBC, footings must extend below 16 in. frost depth · W/C ratio: Keep w/c ≤ 0.50 for exterior exposed concrete · Clay Subbase: Always use a 4–6 in. compacted gravel base over Montgomery's expansive red clay — skipping this is the #1 cause of cracked slabs in Alabama · Summer pours: Schedule before 9 AM; use a retarder for pours over 5 yards in summer heat. Always confirm requirements with the City of Montgomery Building Inspection at (334) 625-2115.
🚗 Montgomery Driveway Concrete
Montgomery driveways use 4–5 inches at 3,000–3,500 PSI — thinner requirements than cold-climate cities since no freeze-thaw damage occurs. A standard 20×20 ft driveway needs approximately 5 cubic yards. Montgomery's lower labor costs make installed driveway prices among the most affordable in the Southeast — typically $1,600–$3,200 all-in. Stamped and exposed aggregate finishes are increasingly popular across Montgomery's growing suburban neighborhoods like EastChase, Prattville, and Pike Road.
🏗️ Montgomery Clay Soil Foundation Warning
Montgomery's expansive red clay soils are the biggest threat to concrete in the area. Alabama's Piedmont clay expands when wet and contracts when dry, exerting powerful lateral and uplift forces on concrete slabs. Without a proper compacted gravel base of at least 4–6 inches, even well-mixed concrete will crack within 3–5 years. A geotechnical soil test is strongly recommended before any new foundation or large slab pour in Montgomery — especially in newer subdivisions where topsoil may have been stripped during grading.
🌧️ Montgomery Rainfall & Drainage
Montgomery averages 54 inches of rainfall per year — well above the US average — and heavy summer thunderstorms are common. Proper slope (minimum 1/8 in. per foot away from structures) and control joints every 8–10 feet are critical for outdoor concrete in Montgomery. Ponding water on flat slabs accelerates surface scaling and promotes moss and algae growth on patios in Alabama's warm, humid climate. Always ensure your concrete contractor plans drainage before any pour.
How to Use the Montgomery Concrete Calculator
Using the Montgomery Concrete Calculator is straightforward. Measure your length and width in feet and depth in inches. Multiply length × width × (depth ÷ 12) to get cubic feet, then divide by 27 for cubic yards. Always add a 10% waste factor — in Montgomery's summer heat, concrete sets faster than expected, and calling a second partial truck typically adds $100–$220 in short-load fees. For large pours from June through September, schedule early morning delivery and always request a Type B retarding admixture when temperatures are forecast above 85°F.
Example: 20 ft × 20 ft Montgomery driveway × 4 in = 133.3 cu ft = 4.94 cu yd → Order 5.5 cu yd
⚠️ Montgomery Red Clay Soil Warning
Montgomery's expansive red clay is the leading cause of concrete slab failure in central Alabama. When clay soil absorbs moisture during Alabama's frequent heavy rains, it swells and pushes upward against the slab. When it dries during summer drought, it shrinks and creates voids beneath the slab, causing it to crack and settle. Never pour concrete directly on undisturbed clay in Montgomery — always excavate and replace with 4–6 inches of compacted #57 crushed stone or dense-graded aggregate. This single step will dramatically extend the life of any Montgomery concrete slab.
Montgomery Concrete Cost by Project Type
Montgomery AL offers some of the most affordable concrete pricing in the Southeast. Ready-mix delivery runs $97–$109 per cubic yard, with delivery fees of $100–$220 per truck. All-in installed costs below include materials, labor, forming, and finishing at current Montgomery market rates.
Project Type
Typical Size
Thickness
Cu Yards
Material Cost (Montgomery)
Installed Cost
PSI Grade
Driveway
20×20 ft
4–5 in
~5.0 yd
$486–$546
$1,600–$3,200
3,000–3,500 PSI
Patio / Slab
12×16 ft
4 in
~2.9 yd
$283–$316
$900–$2,200
3,000 PSI
Sidewalk
4×40 ft
4 in
~2.0 yd
$195–$218
$600–$1,400
3,000 PSI
Foundation Slab
1,200 sq ft
6–8 in
~22–30 yd
$2,143–$3,270
$6,000–$14,000
3,500–4,000 PSI
Footings
10 LF × 12×12 in
12 in (below 16 in. frost)
~0.6 yd
$58–$65
$280–$650
3,000 PSI
Garage Slab
24×24 ft
4–5 in
~7.1–8.9 yd
$690–$970
$2,400–$5,000
3,000–3,500 PSI
Commercial Slab
5,000 sq ft
6 in
~93 yd
$9,051–$10,137
$22,000–$50,000
3,500–4,000 PSI
🚗 Driveway — 20×20 ft
Thickness4–5 in
Cubic Yards~5.0 yd
Material (Montgomery)$486–$546
Installed Cost$1,600–$3,200
PSI3,000–3,500 PSI
🛤️ Patio / Slab — 12×16 ft
Thickness4 in
Cubic Yards~2.9 yd
Material (Montgomery)$283–$316
Installed Cost$900–$2,200
PSI3,000 PSI
🏗️ Foundation Slab — 1,200 sq ft
Thickness6–8 in
Cubic Yards~22–30 yd
Material (Montgomery)$2,143–$3,270
Installed Cost$6,000–$14,000
PSI3,500–4,000 PSI
🏢 Garage Slab — 24×24 ft
Thickness4–5 in
Cubic Yards~7.1–8.9 yd
Material (Montgomery)$690–$970
Installed Cost$2,400–$5,000
PSI3,000–3,500 PSI
Montgomery Concrete Costs vs. Alabama Cities
Montgomery offers some of the lowest ready-mix prices in Alabama. Prices rise slightly in larger metros like Birmingham and Huntsville due to higher demand and longer haul distances. Use this comparison to benchmark your Montgomery project against the broader Alabama market.
City
Ready-Mix Range (per yd)
Labor (per sq ft)
Driveway Installed
Frost Depth
Notes
Montgomery
$97–$109
$3.50–$6.50
$1,600–$3,200
16 in.
State capital
Birmingham
$102–$118
$4.00–$7.50
$1,800–$3,600
18 in.
Largest AL market
Huntsville
$104–$120
$4.00–$7.50
$1,900–$3,800
20 in.
North AL / NASA
Mobile
$100–$114
$3.50–$6.50
$1,650–$3,300
10 in.
Gulf Coast market
Tuscaloosa
$99–$112
$3.50–$6.50
$1,600–$3,200
16 in.
University city
Auburn / Opelika
$98–$111
$3.50–$6.50
$1,600–$3,200
16 in.
East AL market
Montgomery
Ready-Mix$97–$109/yd
Driveway Installed$1,600–$3,200
Frost Depth16 in.
MarketState Capital
Birmingham
Ready-Mix$102–$118/yd
Driveway Installed$1,800–$3,600
Frost Depth18 in.
MarketLargest AL
Huntsville
Ready-Mix$104–$120/yd
Driveway Installed$1,900–$3,800
Frost Depth20 in.
MarketNorth AL
Mobile
Ready-Mix$100–$114/yd
Driveway Installed$1,650–$3,300
Frost Depth10 in.
MarketGulf Coast
Montgomery Concrete Tips — Save Money & Avoid Failures
Always verify your contractor's Alabama CLSB license before signing — visit gencontracts.alabama.gov to check license status, bond, and any disciplinary actions on file.
Never skip the gravel base on Montgomery projects — placing concrete directly on red clay is the single biggest mistake made by homeowners and budget contractors; always require 4–6 in. of compacted crushed stone beneath every slab.
Schedule summer pours before 9 AM — Montgomery's July and August heat index regularly exceeds 100°F; concrete placed in peak afternoon heat can stiffen too fast to finish properly, causing surface defects and reduced strength.
Install control joints every 8–10 feet on all outdoor slabs — Montgomery's wet-dry cycle and clay soil movement make crack control joints essential; without them, random cracking is nearly guaranteed within 2–3 years.
Use a vapor barrier under all interior slabs — Montgomery's humidity and occasional flooding make moisture vapor transmission a real concern for garage and basement floors; a 10-mil poly barrier prevents efflorescence and mold.
Get at least 3 written bids from CLSB-licensed Montgomery contractors — Alabama's competitive labor market means you can often save 15–25% on driveways and patios by getting multiple quotes.
Order 10% extra on every Montgomery project — short-load fees from local suppliers run $100–$220 per partial truck, always more expensive than the cost of a little extra concrete ordered upfront.
Pull a City of Montgomery building permit for driveways, foundations, and any structural concrete — unpermitted work can create problems during home sales and refinancing inspections.
✅ Montgomery Bag Concrete vs. Ready-Mix Guide
For small Montgomery projects under 0.75 cubic yards — fence posts, mailbox pads, small repairs, or step patches — bagged 80 lb concrete from local Home Depot, Lowe's, or Menards runs $6–$8 per bag and is a practical DIY choice. Above 1 cubic yard, ready-mix from Montgomery-area suppliers like Vulcan Materials or Argos Concrete delivers consistent 3,000 PSI strength, saves significant mixing labor, and is the only practical option for driveways, slabs, and any permitted work. For any Montgomery project over 2–3 yards, ready-mix is always the smarter and more cost-effective solution.
How much does concrete cost per yard in Montgomery, AL?
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Ready-mix concrete in Montgomery, AL ranges from $97 to $109 per cubic yard for standard 3,000 PSI mix with 3/4 inch crushed stone aggregate — making it one of the most affordable ready-mix markets in the Southeast. Higher PSI mixes (3,500–4,000 PSI) run slightly more. Delivery fees are typically $100–$220 per truck. For jobs under a full load (8–10 yards), short-load surcharges add $12–$25/yd to your effective cost. Montgomery's combination of low labor costs and proximity to Alabama's aggregate quarries keeps prices well below the national average.
Why does Montgomery concrete crack so much?
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The primary cause of concrete cracking in Montgomery is expansive red clay soil. Alabama's Piedmont clay absorbs moisture during heavy rain and swells upward, then shrinks during dry spells and creates voids beneath the slab. This constant movement cracks even properly mixed concrete. The solutions are: always use a compacted gravel base (4–6 in. of #57 stone), install control joints every 8–10 feet, use 3,500 PSI mix for better crack resistance, keep slabs properly sloped for drainage, and cure the concrete slowly with wet burlap or curing compound — rapid drying in Montgomery's summer heat also promotes plastic shrinkage cracking.
How deep do footings need to be in Montgomery, AL?
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Montgomery County's frost depth is only about 16 inches — one of the shallowest in the country due to Alabama's mild winters. Most residential footings in Montgomery are placed at 18–24 inches for safety margin. However, for clay soil sites, deeper footings placed on more stable soil may be recommended by a geotechnical engineer. The City of Montgomery Building Inspection at (334) 625-2115 can provide current code requirements — always verify footing depth requirements with your building permit before pouring.
Do I need a permit for concrete work in Montgomery?
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Yes — the City of Montgomery Building Inspection Department at (334) 625-2115 requires permits for new driveways, foundations, commercial slabs, and structural concrete work. Permits for simple residential patio replacements may not always be required, but it is best to confirm before starting. Montgomery County also has jurisdiction for work outside city limits. Permitting ensures your work is inspected and meets current IBC standards — this protects you from contractor shortcuts and helps at resale time.
What is the best time to pour concrete in Montgomery?
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Unlike northern cities, Montgomery can pour concrete year-round — the city rarely sees hard freezes. The best months are October through April when temperatures are between 50–75°F, humidity is lower, and afternoon thunderstorms are less frequent. Summer pours (June–September) are workable but require early-morning scheduling (delivery by 7–8 AM), Type B retarding admixture, and immediate surface protection from evaporation. Avoid pouring when rain is forecast within 24 hours — Alabama's heavy summer rains can wash cement paste from fresh concrete surfaces, weakening the slab significantly.
How do I find a licensed concrete contractor in Montgomery?
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All general and specialty contractors in Alabama must be licensed by the Alabama Contractors Licensing Board (CLSB). Verify any contractor's license, bond, insurance, and disciplinary history at gencontracts.alabama.gov before signing any contract. Alabama law requires written contracts for work over $10,000, but getting everything in writing regardless of project size is highly recommended. Always get at least 3 bids from licensed Montgomery contractors — pricing in the local market is very competitive, and you can often save 15–20% by comparing quotes.
Official references and trusted tools for your Montgomery concrete project
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City of Montgomery Building Inspection
Official Permits
Apply for residential and commercial concrete permits, verify inspection requirements, and download permit applications for driveways, foundations, patios, and slabs in Montgomery, AL. Call (334) 625-2115 or visit montgomeryal.gov.
Verify any Alabama contractor's license status, bond, insurance, and disciplinary history before hiring. All concrete contractors working in Montgomery must hold a current CLSB credential — always verify before signing any agreement.
ACI 305 governs hot-weather concrete placement in Montgomery and across Alabama. It covers mix design adjustments, retarding admixtures, curing requirements, and scheduling recommendations for summer pours when temperatures exceed 90°F.