Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Related Articles


Repair and overlay existing asphalt parking lot

Repair and overlay existing asphalt parking lot

Repair and overlay existing asphalt parking lot

Good afternoon. I have a few existing parking lots that have a asphalt buildup varying between 2.25" to 4.5"+ and then one lot with an unknown thickness. The parking lots do have some cracks, but not too excessive. Areas that appear to be in failure will be receiving full depth repair. I have 2 questions. What is the thinnest I can mill in the areas that are 2.25" without leaving the remaining asphalt to thin to be damaged prior to resurfacing? 2nd question would be, if I was to just place a tack coat and an 1.5" overlay, how should the existing cracks be repaired? Would placing tack coat and a 1/4" leveling course fill the cracks prior to the 1.5" overlay? I've read that it is not recommended to crack seal prior to an asphalt overlay. These are in northeast Ohio. Thanks.

RE: Repair and overlay existing asphalt parking lot

You can mill your 2.25t thickness to 1 inch without difficulty. This will allow you a reasonable overlay. No need to repair cracks before overlaying. Use a crack relief layer or a synthetic grid instead. I would not recommend a thin leveling course....It is better to used controlled milling than to use a leveling course.

RE: Repair and overlay existing asphalt parking lot

Ron - thanks for the reply. Leaving only 1" of asphalt after milling, will that hold up under the weight of the pavers and asphalt trucks?
Unfortunately, the use of a crack relief layer or a synthetic grid is not feasible due to cost. We only have enough funds to place a 1.25" to 1.5" overlay, so I don't want to place a grid with that thin of an overlay, I've seen issues with placing thin overlay and using fabric/grid.

RE: Repair and overlay existing asphalt parking lot

gcb.... Yes, 1" will hold up fine under paver and truck weights for reconstruction. I live in the land of thin asphalt and even thinner overlays! It's done routinely here.

If you can do grid or crack relief, then fill all cracks before overlaying.

RE: Repair and overlay existing asphalt parking lot

Thank you.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Research Report: State of IoT Adoption in Product Development 2019
This research report, based on a survey of 234 product development professionals, examines the current state of Internet of Things (IoT) adoption by product design teams, its perceived importance, and what features and capabilities teams consider important when making decision about adding IoT functionality to their products. Download Now
Research Report: Augmented Reality for Maintenance, Repair and Overhaul (MRO)
The term Industry 4.0 denotes a cluster of technologies that’s poised to fundamentally reshape manufacturing and bring about a new industrial revolution. These include 3D printing (AM), the Industrial Internet of Things (IIoT), artificial intelligence (AI) and mixed reality technologies, more commonly known as virtual reality (VR) and augmented reality (AR). Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close