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Discussing Integral Cove Base

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Geym

Mar. 07, 2024
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February 16, 2022

I wanted to get a better understanding for cove base, specifically integral cove base, so I sat down with Dur-A-Flex Regional Manager – South, Kevin Stephens, and Northeast / Mid-Atlantic Regional Technical Manager, Rob Pacheco Jr.

Watch the video to hear our full conversation or read on for a synopsis of what I learned.

Cove Base vs Integral Cove Base

Traditional cove base is the piece of trim installed around the base of a room to create a transition between the floor and the wall — typically to hide an unsightly seam. Integral cove base is actually a seamless transition from the vertical wall to the horizontal floor. This transition is also watertight.

With traditional cove base there’s a seam or a gap which could allow water to get underneath it or behind it and support the growth of bacteria. An integral cove base has a rounded transition to the floor, which allows the use of a squeegee to clean it properly and remove the water. This prevents the growth of bacteria or other bad actors.

Industries Using Coving

Cove base is typically installed in any industry that requires a hygienic floor, such as pharmaceutical or healthcare facilities, veterinary offices, grocery stores, labs, clean rooms, etc. — typically any area areas that have to be sanitized and have a lot of water on the floor. Integral cove base creates a bathtub effect, so you can keep everything from going to the wall, and it’s easy to clean.

Standards for Cove Base Height

According to Stephens, four to six inches is pretty standard. He shared that anything above that seems unnecessary as it can be very costly and time consuming. “The cove base is hand troweled— it’s very labor intensive. So the higher you go up the wall, the more labor and the more material that’s required.”

If the walls are a concern Stephens recommends tying in a wall system instead. The wall system can be installed behind the cove base which creates a seamless environment all the way up the wall. This method is common in environments with wet walls such as the walls behind sinks, toilets, and showers.

The Radius and Its Purpose

The radius is the curve of the transition from the wall down to the floor and it directly impacts the cleanability of the surface. Pacheco Jr. explained that a three quarter or one inch radius is what is typically specified in the U.S. Traditionally the cove base is installed first and then the floor. Some of the base radius is lost in this process and there’s been a trend to increase the radius to make up for this loss and also further address the ease of cleaning. Stephens added that a three quarter inch radius can quickly turn into a ninety degree radius with a thicker flooring system.

3/4″ Radius Cove Detail

He also commented on the move to larger radii explaining that the resinous flooring industry is seeing a move toward a two inch radius in pharmaceutical and healthcare environments to address issues with standing water and cleanability as it is much easier for a squeegee to get into a larger radius to pull the water away.

Stephens went on to explain that the larger radius goes beyond initial needs of cleanability. “In pharmaceutical facilities a lot of times the floors are installed over top of existing floors. So as you build floors on top of floors in those facilities, the radius becomes less and less. So starting out with a large radius allows you to build and maintain that cleanability for the future.”

Defining Cant Cove

Cant is a cove base that has a forty five degree angle instead of a rounded radius. The transition from the wall down to the floor resembles a small ramp, and it’s usually specified in areas that use carts. The cove works as a curb to prevent carts from damaging walls. These are common use in food and beverage processing plants for that reason and for use in freezers with metal walls. Pacheco Jr explained the metal walls and the concrete move at different and the cant cove helps prevent movement or deflection of the cove base from that metal wall. “If there’s enough movement, the cove will separate at the top of the cant cove versus our traditional cove which will spider crack on the face of the cove. So it makes it a little bit easier to maintain, and if there is a repair needed it’s much easier to do.”

Cant Cove Detail

Recommendations for Installing Cove

As mentioned before, the best practice is to install the cove before the floor just because it is a labor intensive process and it requires having the proper tools:

  • Lighting  “Lighting provides a back light and acts essentially as a glossy top coat, and it’ll show any potential imperfections such as trowel marks, waves in the cove, or even rough sections. That’s ultimately what you’re trying to capture and eliminate are those trowel marks and rough sections.” Halogen lights work best, they should be on the floor, aimed down the wall. 
  • Cove trowels Pacheco Jr. recommends having both four and six-inch trowels, a flat trowel and a margin trowel for detail work, “all of the trowels, if you will.” He reminded us of the need to take care of the trowels as any types of burls or snags will catch and create drags or defects in the cove.
  • Solvents When it comes to solvents xylene works as the best lubricant because it is an epoxy thinner. It is useful for fixing imperfections with a simple chip brush. If a contractor doesn’t like using Xylene, Pacheco Jr. recommended the use of acetone or alcohol as a lesser but suitable alternative. If solvents can’t be used he recommended the use of soapy water such as a one to ten mixture of simple green and water. Be mindful to use just enough lubricant to smooth and close the base, too much will interrupt the cure or cause staining.

Using Tape Lines and Cove Strips

To achieve a straight edge for the top of the cove base there are two main methods:

  • Tape Line Method With the tape line or chalk line method, a straight line is applied to the wall demarking the height of where to build the cove base to. This method is seamless.
  • Cove Strips Cove Strips made of metal, zinc or plastic are affixed to the wall and create a lip to build the cove base to. These are necessary when having the cove base meet a thicker material such as a fiberglass reinforced panel or tile. The lip does create a seam which should be caulked. 

Interestingly enough Stephens and Pacheco Jr differed in their preference for cove strips versus tape or chalk lines. They came to an agreement that there is a time and a place for both and it comes down to individual use and or preference for aesthetics. The max thickness for cove is an eighth inch — anything thicker and it could sag and crack as it cures, especially at a six inch height or higher. A cove strip will help installers maintain the eight inch max thickness throughout the cove base. If the cove needs to meet a wall surface over an eighth inch the area behind the cove should be built out with wood, cement board or backer board to fill any differences in thickness.

“Cove base is critical to make a seamless sanitary floor. So very, very important.”

Kevin Stephens, Dur-A-Flex Regional Sales Manager – South

Determining the Quality of Cove Base

The quality of the coving is determined visually by a consistent appearance in height and radius throughout the cove base, and how well the inside and outside corners are constructed. Pacheco shared that the smoothness of the surface of the cove is imperative as this is what impacts the cleanability. Any kind of rough spots, any kind of voids or lips, can trap dirt and harbor bacteria, etc. and could create issues down the line for the customer. A good way to make sure a cove base is smooth is the glove test. If the glove snags on anything it needs to be sanded further. Use the back light to fix issues while the cove is wet, when the cove is cured often it is too late to fix visible mistakes.

Stephens added, “when you walk into a room and you look over the flat floor, an okay floor can look really good, but a bad cove base looks really bad. That’s what the light reflects off of. So cove base is critical.” He advises that contractors have their best and most talented person install the cove base; noting that the quality of cove base is typically what an owner or an architect will have an issue with more so than the floor installation.

Installer performing glove test

Recommendations for Pricing Cove Base

Understanding how to price coving is important for every flooring contractor. It isn’t as simple as just taking linear footage. Pricing cove base involves understanding the space and looking at drawings to determine if you have long straight runs or a mix with inside and outside corners.

Stephens expanded, “are there a bunch of small rooms like bathrooms or kennels in an animal shelter with a lot of inside and outside corners? Those inside and outside corners are very time consuming and somewhat difficult to do. You can lose a lot of money if you do not price your cove base properly by understanding the rooms that it’s going into.”

Thoughts on Preformed Coves

The consensus on preformed coves are they’re not recommended or designed to be used with resinous flooring systems. Preformed coves are not seamless and typically are applied to the wall using a type of adhesive. Since many walls are not perfectly straight, the preformed cove can create gaps and spaces that need to be filled — essentially creating an unnecessary maintenance item.

The labor involved with cutting, fitting and caulking preformed cove negates any time or cost savings; more importantly, the cove base is not as strong or seamless as a troweled resinous cove.

Mastering the Craft

For any flooring contractors who would like to hone their cove base skills, Pacheco Jr. recommends attending an Applicator Training Program (ATP) with Dur-A-Flex. The ATP gives an introduction to Dur-A-Flex and best practices in terms of industry standards for installing resinous flooring projects. A section of the training is dedicated to installing cove base.

Pacheco Jr. recommends contractors continuing to practice at their own shops. “Honestly coving should be the first skill flooring contractors should learn because it forces them to pay attention to detail and really learn the craftsmanship it takes to install a good cove or good floor in general.”

Example of a cove base training station

Stephens agreed and explained that not every person on a crew is going to be able to do it extremely well. He admitted that he can tell someone how to install it perfectly, but he couldn’t install it perfectly himself. “It’s an art form and it’s a skill, that to Rob’s point, definitely requires practice to be really good at it.”

Learn More on Cove Base

Dur-A-Flex Territory Sales Managers are a great resource to learn more about integral cove base. Get in touch by email or fill out this form.

Contact Dur-A-Flex

Author: Jes Grant
Jes Grant is the content development manager for Dur-A-Flex. She has over 15 years of experience creating content for various technical industries, and has been featured in several publications for her writing and design work.


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Any architect who has worked on a hospital or healthcare facility knows the importance of choosing the right flooring and flooring accessories. A porous flooring surface or mis-installed accessory can create a hotbed for bacteria, endangering patients and the doctors and nurses who take care of them.

Here are the most common problems we’ve seen with flooring in healthcare facilities and tips for solving them.

Problems with Bacteria Growing On and Under the Floor

Hospitals are cleaned all the time, but that doesn’t mean that all bacteria can be stopped. Bacteria particularly thrives in places that are harder to reach, like seams and corners, or even under the flooring if there’s space between the visible flooring and the surface beneath it.

Solve this problem by choosing heavy-duty, non-porous flooring.

Our top two recommendations for hospital flooring are sheet vinyl and luxury vinyl tile (LVT). Both materials are stain resistant (important for potential spills of bodily fluids and the frequent chemical cleanings), able to withstand heavy traffic, and very durable.

Proper installation is key to preventing fluids from seeping beneath the flooring, which can create a place for bacteria to thrive.

Traditional wet glues can emit harmful VOCs which could exacerbate a patient's health problems, so instead we recommend using a low VOC adhesive for installation.

Common Problems with Cove Base

Cove base presents a similar set of issues as the flooring itself - if installed improperly, fluids can seep behind it and bacteria can grow rampantly. Most hospitals’ cove base is glued to the floor, then heat welded at the seam on the bottom. While this gives a strong hold, there are better options.

The first strategy is to install cove base with a dry adhesive like Opti-GripⓇ.

Opti-GripⓇ is free of the toxic VOCs found in wet glue, making it a safer choice for patients. It also doesn’t require curing time, allowing for immediate foot traffic post-installation. It creates a strong bond, and fluids will not creep behind it.

An alternative would be to go without cove base at all, instead curving the flooring up the wall using a cove former and capping seal. This option eliminates the seams at the floor that can be difficult to clean thoroughly and where bacteria can build up. Not only is this a sanitary option, but it is also often less expensive than installing cove base.

The Biggest Problem with Transition Strips

Transition strips present a different set of problems as they can become a serious trip hazard.

Transitions are required wherever one type of flooring transitions to another. Most of the time, this is no issue.

In hospitals, however, you have to worry about rolling IV poles, wheelchairs, gurneys, and more that could get stuck on a thick transition, as well as patients of limited mobility who could trip over one.

Instead, consider t-caps. Most of the flooring used in hospitals, particularly LVT and sheet vinyl, are of similar thicknesses, which makes t-caps the ideal choice. They are the lowest profile, making them safe for patients to easily step over and creating a smooth surface for wheelchairs, rolling carts, and more.

They also are often less expensive than transition strips, and can even last longer than them depending on the profile you choose.

Aluminum t-caps are often the best choice for healthcare facilities because they are sturdy and can hold up to heavy traffic. They’re also easy to install, simply tapping into the space between the two flooring surfaces, then self-adjusting to fill the space.

Patient safety is of utmost importance in hospitals, and flooring plays a major role in achieving this goal. By specifying the right flooring and accessories and ensuring they’re installed properly, you’re doing your part to help hospitals achieve this goal.

Additional Resources:

Discussing Integral Cove Base

Common Problems with Hospital Flooring and How to Prevent Them

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