Your Guide To Different Types of Truncated Domes

In areas where accessibility and safety could be of concern to visually impaired pedestrians, you are required to install tactile paving, also known as Detectable Warning Systems, or truncated domes. These are designed to be felt underfoot or through a cane or mobility aid to let the individual know that a hazard is close. There are several types of tiles available, so let’s take a look at the differences.


Tactile paving tiles are usually available in two different forms; regular and radius. The regular form is rectangular and is used for installation along strain lines, such as the edge of a transit platform. Radial forms are curved to allow them to be installed around curves at curbs and walkways.


The truncated domes that make up tactile paving create a noticeable surface that feels unique to any other walking surface. The truncated domes must be within a specific height and diameter and be spaced at particular intervals to be compliant. They are usually laid out in a grid pattern, but radial patterns are also available. 


There are three main types of installation for truncated domes, each with its own associated advantages and disadvantages. These are as follows:

  • Cast-in-Place - These are a long-term option for tactile paving and are usually made from iron or a composite of fiberglass and carbon. The underside will feature ribs that embed into freshly poured concrete to secure the tile in place. The downside is that they can only be installed in fresh concrete and will need a complete demo to remove.
  • Surface Applied - These can be applied to existing concrete, making them useful where it is not feasible to replace the concrete. They are lightweight fiberglass which means in heavy traffic areas; they may need replacing more often than stronger cast-in-place concrete.
  • Replaceable Cast-in-Place - This option allows the top of the tile to be removed without demolishing the concrete underneath. They initially have to be installed in fresh concrete, but only the top part can be removed and replaced as required.

California Truncated Dome Company can help you to choose the most appropriate tactile paving to meet your needs. Call today at 415-813-9877 and book a compliance analysis for your property. Don’t wait for the ADA lawsuit; take action now.


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Our primary focus here at California Truncated Domes Company is handling all of your truncated dome needs. This is what we do. We are experts in this particular area of ADA construction and will make sure your truncated domes are in full compliance with ADA guidelines and the California Access Compliance Manual.

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