Heavy-Duty Use Parking Lot: 6-inch thick hot mix asphalt layer on . Parking Lot Paving: Guide to Proper Thickness for Asphalt Parking Lots. Consistency, quality, and moisture conditions all play a factor in rating the substrate. Parking lots for passenger vehicles normally have an asphalt thickness of four to six inches over an aggregate base that is between three and six inches deep. Standard commercial lots should be made with an 8.0-inch dense aggregate base layer to provide a stable sub-base foundation. Where as if compression is mentioned in the same line or before the thickness of the aspahlt than likely post-compactions thicknesses are given. For asphalt parking lots, the type of asphalt that is widely used for this project is porous asphalt. 40mm HL3-HL4 Base Course with a 40mm HL3F-HL3 Surface Course - for very light duty use (cars and small trucks only), 50mm HL4-HL8 Base Course with a 40mm HL3 Surface Course - for larger lots which may see some heavy traffic. When we are consulting with a company, they will oftentimes ask, How thick is parking lot asphalt? Several factors go into that answer, so lets take a look at how we determine parking lot thickness, which begins by understanding the layers used to comprise asphalt. A main part of asphalt installation is ensuring proper asphalt parking lot thickness and that your asphalt parking lot is installed properly. Whether an apartment complex, office building, or HOA community, the parking lot is one of the first areas people see when they check out your property. For your driveway, you should be using between 6-8 of properly compacted granular base aggregate on top of the subgrade. a full-depth light-duty parking lot is recommended to have a compacted layer of about 4 inches of hot mix asphalt to be laid on top of the subgrade. [How to Stabilize Sand & Prevent Erosion], Does Dog Urine Stain Stone Pavers [How To Remove It], Is Stamped Asphalt Good For Driveways? MS-2 Mix Design Methods for Asphalt Concrete and Other Hot-Mix Types. For heavy-duty lots, there should be 3 . Specifying pre-compaction laid thickness leaves more wiggle room in the post-compaction thickness. There is certainly a science to how thick an asphalt layer should be used for a project. Most often larger parking lots are paved in 2 layers, this is because there is a maximum thickness of aspahlt than can be properly compressed with a certain size of roller, it also allows different grades of aspahlt to be used depending on the function of the layer. Sometimes, a business owner may already have a concrete parking lot that they wish to upgrade with asphalt pavement. Unlike concrete which requires thickness to provide strength and weight resistance, asphalt is dependent on the layers on which it is built. When you buy through links on this page we may get a small commission. How Is Asphalt Priced? Continue to keep the lot clean and free of weeds. There are 3 most often seen thickness specifications: You do not need to have an engineering firm tell you what thicknesses of aspahlt you should request on your quote, O'Brien Paving Inc. are very experienced with all things aspahlt and would be happy to consult with you and help you make the best choices in regards to your project. If so, give DC Construction Services a call today. It is also a very cost-effective solution and can last for more than 20 years, with a probability of a few minor patches here and there. The thing is asphalt driveways should always be built to accommodate . After paving, the two layers are compacted to a thickness of 4 to form the final thickness. . (720) 410-5374. Professional concrete parking lot designers use the ACI 330R-08, Guide for Design and Construction of Concrete Parking Lots. One of the most important aspects of a successful asphalt paving project is the thickness of the asphalt itself. Call for a free estimate on asphalt parking lot installation. Proper drainage is the last essential element in making this determination, which we will discuss in our final piece of this series. a full-depth heavy-duty parking lot is recommended to have about a 7.5-inch thick layer of hot mix asphalt to be applied on the subgrade. Presumably, you know well the vehicles that frequent your lot. Is it considered good, moderate, or poor? To protect asphalt from the climate, homeowners should fill cracks annually and apply a protective sealant every 3-5 years costs range from $0.20 to $0.50 per square foot plus labor. It helps keep your asphalt parking lot in its best possible shape. Over the 15-20 year life of a blacktop driveway, repairs and maintenance cost $800-$1000 .. "/> Aurora Asphalt & Sealcoating . An asphalt parking lot that regularly holds light-duty traffic from, let's say, shoppers in mid-sized sedans will undoubtedly experience less stress than one that carries tractor trailers daily. It also primarily carries passenger vehicles with less than 5% single-unit trucks and 3% of combination trucks. The thickness should be about two . Contractors paving private asphalt road. Call for a free estimate on asphalt parking lot installation., . Asphalt thickness is also based on the volume and type of traffic that is expected to use the facility. It should be spread and compacted to the thickness indicated on the plans. For starters, asphalt pavement is characterized by layers of different materials with specific strengths and functions. The exact measurements vary based on site conditions and the amount of traffic you can expect on your lot. A proper 2 inch compacted layer of aspahlt on a good base can easily last for 20+ years, we often see driveways we paved 30 years prior still in excellent shape. Life expectancy for a new driveway or parking lot is between 15-20 years with proper maintenance. The thickness of an overlay will usually range 1.5 to 2. Concrete Parking Lot - #2. Asphalt Thickness: Residential -. This information is necessary to know in order for your contractor to know the right thickness to set on your parking lot. A heavy-duty parking lot on a poor subgrade needs to be 10 to 12 inches thick. Permeable pavers like those produced by TRUEGRID are a far superior alternative to a concrete or asphalt parking lot. If these structural problems are found, the old asphalt will need to be removed to dig out the soft spot of the subgrade and refill it with 2-inches of rock and aggregate. Bradley Asphalt Services offers services at the best value for asphalt repairs, driveway installation, sealcoating and parking lot paving and repair for residential and commercial projects. Are you curious about the thickness of asphalt your parking lot would need? Asphalt overlay thickness varies and is specific to use, load and surface traffic and volume. Asphalt Parking Lot - #1 - Most Ongoing Maintenance. If you are considering construction for a light-duty parking lot, the standard thickness for an asphalt layer is 2-3 inches, depending on the vehicle volume it will receive. When the parking lot access opening is limited to less than thirty feet (30) in width a separate entrance and exit should be used. It doesn't matter how great the base is, if the asphalt is laid at an insufficient thickness the parking lot likely won't last much longer than 10 years. General Considerations Asphalt Materials Thickness Design for Parking Lots Traffic Considerations Subgrade Considerations Construction Drainage Parking Stall . Paving your parking lot to the proper thickness is essential to maintain its durability and longevity. For heavy duty traffic like, trucks, loading docks, or roadways . Can You Spray Paver Sealer? An asphalt overlay will probably be between two and three inches. You can expect the asphalt thickness to fall under the range specified above, if the underlying soil has good drainage. However, you can use the above-mentioned formula or an asphalt calculator to find out the amount of asphalt needed for any project. A parking lot is often built upon a foundation of soil subgrade and aggregate layer to create a load-carrying structure to your parking lot. Research Topics. Areas frequently used by trucks (like dumpster sites or loading areas) will require thicker pavement to accommodate the heavier vehicles. This page gives some general guidance when designing at-grade parking lot pavements. A full-depth asphalt light-duty commercial parking lot will need a layer about 4 inches thick of asphalt on a solid and practical subgrade. The suggested asphalt parking lot thickness will differ if your parking lot has an aggregate base layer. . For very weak . [And For Patios], Types Of Asphalt [And How To Choose For Your Driveway Or Walkway]. You can paint parking lot areas that are outdoors or in covered spaces with either solvent-based or water-based paints. However, 24-foot aisles are commonly used throughout. 1 Inch is common on parking lots, some are 1.5" subdivisions commonly put down 3/4" for the first year or two, then ass a second lift at making a total of 1.5" asphalt. Compaction of this asphalt base is one . Because asphalt tends to absorb heat more than concrete does, the addition of trees or shrubbery around can slightly cool the area by offering shade. The thickness of an asphalt driveway is a crucial feature in having a solid and durable driveway that will last for years. An excessively thick asphalt may not be compacted properly and over time, cracks and depressions will appear and deteriorate the paving. asphalt thickness and strength in parking lots Asphalt overlay is a good option to repair and restore an asphalt parking lot, road and driveways that is not too damaged and just needs a facelift. Keeping it safe and appealing is necessary for curb appeal. From as little as four inches to 12 or more inches, the exact thickness will depend on your location, your traffic and local climate considerations. Manuals. The cost per ton is $40 to $80 and per square foot is $0.75 to $2.00. A good driveway starts with the ground (the subgrade), which must be smooth, firm, and evenly contoured. Will the area have light, moderate, or heavy traffic? You can rely on us to help you with all your parking lot needs. Asphalt can be offered in several different types to meet different specifications and can be good solution to correct certain surface deficiencies. Most of Lakewood CO, on the other hand, requires 6 inches for their roadways. It starts off with a soil subgrade on the very bottom, followed by an aggregate layer, an asphalt base layer, and an asphalt surface layer. For full-depth, light-duty commercial parking lots, Murphy recommends 4.5 inches compacted thickness of hot mix asphalt on the subgrade. Heavier use parking lots will need 6 to 8 inches of asphalt. Subgrade preparations, base application and thickness, as well as asphalt thickness are extremely important in ensuring you are getting a good quality pavement with a long life. For heavy duty traffic like, trucks, loading docks, or roadways, we recommend a 2 binder layer. In this process, a machine is used to plane the pavement . Get in touch with Infrastructure @ +1 (416) 514 0809 to discuss the asphalt paving thickness.. Toronto, L5T 1M4, ON, CANADA +1 (416) 514 0809 hello@maininfrastructure.com. On rare occasions, a parking lot might only need 4 concrete. What is the thickness of Asphalt? This is because asphalt is built in layers so making it too thick beyond its recommendation may cause irreparable damage. 5-7 Years. Parking lot mix types: Below are some recommendations on mix types that will help enhance the overall performance of the parking lots. 1. However, more often than not when a specification is not provided, the contractor will provide the quote in pre-compaction thicknesses, this is done for a variety of reasons: A good rule of thumb for asphalt thickness specification on a quotation or contract is that if compression is mentioned after the thickness, than they thickness given is likely pre-compaction. This is reserved for seasonal locations or parking lots that don't get a ton of traffic. Asphalt - How Thick Should It Be? People purposely avoid terrible parking conditions, so you'll attract more customers with a professional appearance. Most often for residential driveways and smaller light duty parking lots we will use pre-compaction thicknesses, which for 99% of all driveways and about 75% of light duty parking lots is 2.5 inches, or once compressed sufficenlty the thickness will be approximately 2 inches. An overlay is then introduced consisting of a 1 " - 2" compacted mat of asphalt with either 3/8" stone or 1/4" stone. When asphalt parking lots or driveways become too deteriorated, heavily oxidized and require base sub-grade repair then a . A minimum of 1" is used for an overlay. Lighter use parking lots usually are a thickness of 4 inches. Paver Parking Lot - #3 - Least Ongoing Maintenance. Complete service guarantees. Once the thickness is known for each section of the parking lot, the . What type of vehicles are expected to use the area? During the preparation phase, leveling and contouring is very . Properly fill any cracks before seal coating your asphalt parking lot. A. All else being equal the big determining factor for longevity of the standard 2 inches of aspahlt is that heavy vehicles like garbage trucks, buses, or other 5+ ton vehicles are very rarely driven over or parked in the parking lot. Full-depth heavy-duty lots should contain around 2 - 3 inches of hot mix asphalt on the subgrade. How Is Asphalt Priced? Will the area have light, moderate, or heavy traffic? Often, but not always, larger parking lots (greater than 10,000 sqft) are quoted post-compaction. Because you want your parking lot to be long-lasting, DC Construction Services considers all of these factors when determining asphalt thickness. Parking lots need to have a 6-inch granular base aggregate while commercial driveways need to have 8 inches. Actual asphalt thickness is largely determined by the quality of the underlying soil and the volume and composition of expected traffic. Paving an asphalt parking lot costs $3 to $7 per square foot, not including marking, striping, curbing, or permits.Paving a 10-car asphalt parking lot costs $9,000 to $21,000 on average or $900 to $2,100 per space of 300 square feet.. Asphalt curbing. There are different variations as to how thick an asphalt parking lot should be. No one wants their expensive asset to breakdown within a few years, when generally an asphalt surface is expected to last 20 to 25 years. A conventional overlay is at least 1.5 inches thick, while a thin overlay is less than 1.5 inches thick. The first article provided an overview of the basics associated with these pavements. For heavy-duty lots, the newer standard specifies four inches of asphalt over 12 inches of base vs. 6.5 inches of concrete applied directly over a compacted earth base. For full-depth, heavy-duty parking lots, he recommends 7.5 inches of hot mix asphalt on subgrade. Asphalt is comprised of several layers of different materials. What is the Cost Difference Between Installed Concrete and Asphalt Parking Lots? As we discussed in our previous blog, there are three essential structural elements of pavement that we will review in our, When discussing these three elements we are going to speak in terms of residential asphalt pavement vs. commercial asphalt pavement in other words, your driveways vs. your parking lot. Lexington, KY. Our full service concrete repair and pavement services range from complete installation to minor maintenance projects and everything in between. If you are in this situation you might be wondering if it is possible to pave asphalt over concrete, then the answer is yes. Most engineering plans will call for a specified post-compaction thickness, if the contract is written to provide work based on an engineered specification then most likey the quoted thicknesses will be in post-compaction to match the specifications provided. Layers of Asphalt Most parking lots are built with a foundation of native substrate soils, which vary in thickness. Data collected about the soil plays an important role in asphalt thickness. a light-duty parking lot with an aggregate base on the other hand, requires a 3-inch thick hot mix asphalt to be laid on top of 6 inches of aggregate base. If you'd like to learn more, we've compiled the information you might need when considering the thickness of your parking lot. An asphalt parking lot requires the most frequent amount of ongoing maintenance when comparing to to other hard surface parking lots. Compression is mentioned in the post-compaction thickness element in making this determination, which must be smooth firm! 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