The truth is, wood and laminate floors on a concrete slab at ground level are not the best flooring for Florida, especially not in the central and coastal regions. This may seem like a self-serving statement coming from tile specialists, but we’re not alone in coming to this conclusion.

Don’t believe us? Mike Holmes, the home improvement guru of the popular TV series “Holmes on Homes”, isn’t crazy about the idea either … more on this later.

What are the Problems with Wood and Laminate Flooring in Coastal Central Florida?

In a nutshell, moisture.

1. Water Table – Florida has a very high water-table. Concrete slabs absorb water from the ground beneath our homes. Concrete is not a barrier to moisture. If you’ve dug any holes in your yard, you know it doesn’t take long to hit soggy sandy ground. This is why there are no basements here. It’s just too wet.

The images below show a slab in a Suntree home (Brevard County, Florida) that was trench cut to run new plumbing lines in a utility room and kitchen renovation. You can clearly see where the slab starts to show moisture content from the ground under the home. The slab is 8” thick. This photo was taken about 5 hours after the trench was cut.

concrete slabs can be placed under the best flooring for florida 

For scale and visual reference, this next image is the same trench still showing moisture content a week after it was cut and exposed to air conditioning.

concrete slabs can store moisture underneath the best flooring for florida

Here is another Brevard County home where the slab has absorbed moisture from the high-water table in Florida. Originally, a laminate floor was in this room. A local tile contractor removed it and discovered a large patch of mold seen in the back of the room. In this case, evidence of Florida’s high-water table is seen on the surface of the slab. The darker gray areas indicate moisture in the concrete.

moisture under laminate flooring not the best flooring for florida

2. Tropical Storms – All too common tropical storms and the rainy season are typical causes of wood and laminate flooring failures due to water intrusion through entrances or seeping through foundations. Florida weather can dump more rain in a short period of time than can be quickly drained away. Even minor flooding will destroy wood and laminate floors. These materials don’t have any resistance to water. Many of the wood floors we’ve replaced with porcelain tile were damaged beyond repair by very short-term flooding.

These photos are of the entry, just inside the front door of the home. The area was subjected to frequent water intrusion from storms.  The Suntree home was built in the late 1990’s.

late 90s home did not have the best flooring for florida  another photo of the water damage by not using the best flooring for florida

Mold growth can clearly be seen throughout the underside of the vapor barrier. The lower left darker area is the concrete slab. Black mold and remnants of an earlier tile installation can be seen. Roofing felt was used as an underlayment for the home’s original tile installation – an all-too-common mistake made by previous flooring installers.

The wood flooring was warped and frayed, but didn’t show visible signs of mold on the surface. Mold wasn’t detected until the wood flooring was extracted in preparation for new tile flooring. The licensed tile contractor removed and replaced the failed wood flooring with porcelain tile flooring.

3. Appliance and Plumbing Leaks – dishwashers, washing machines, refrigerators, hot water heaters and plumbing leaks account for many damaged wood floors. A tiny leak under a powder room sink can spread water throughout the ground floor within minutes.

best flooring for florida not used, caused appliance and plumbing leaks damage  

This laminate floor extraction in Titusville shows clear evidence of mold on the surface of the laminate and on the grey underlayment in the photo on left. Mold within the tongue and groove can be seen in the stack of extracted laminate in the background of the photo on the right.

In this case, humidity under a refrigerator was the culprit. Again, the home-owner wasn’t aware of mold until he decided to replace the worn & torn laminate flooring with durable porcelain tile flooring. It was discovered during removal of the laminate and vapor barrier.

4. Furry Family Members – Pet accidents wreak havoc on wood and laminate floors; warping, peeling and curling edges of wood and laminate flooring. Our furry family members account for more damaged floors than you might expect! We’re surprised how often this is a factor in flooring renovations.

In this Melbourne Florida home shown below, the slab at the base board indicates mold in the vapor barrier underlayment. This laminate flooring, along with carpet, was removed after repetitive pet accidents.  Porcelain tile flooring replaced failed laminate flooring.

          

5. Combinations of Problems – Flooring failures can be caused a combination of water intrusion sources. Flooding at exterior foundations due to lack of gutters, window leaks and irrigation heads directed towards the home are but a few possibilities.

In this case, water intrusion at the foundation and a window leak allowed just enough moisture into the home’s interior carpeted flooring. Damp carpet, a haven for dirt and organic matter, is the perfect habitat for mold and mushrooms.  Yes, that’s right! You are looking at mushrooms (or toadstools) growing in the carpet below.

Vapor Barriers

While moisture is the primary cause of these flooring problems, the secondary cause is vapor barriers.

Because wood and laminate floors absorb moisture, measures to protect these materials must be taken when they are installed at ground level. Vapor or moisture barriers can be as simple as a sheet of plastic or a more complex multi-ply sheeting that acts as a moisture, thermal and sound barrier in one application.

At first thought, a plastic or vinyl sheet barrier installed on top of the concrete slab under the flooring seems like a good idea; however, the barriers do not eliminate the moisture in the concrete slab. As we know, there is a perpetual moisture source in the ground under our Florida homes.

Vapor barriers act much like plastic wrap on top of a warm bowl of soup. Water condenses on the underside of the plastic with no means of escape. It is within this environment that mold has an ideal place to grow, undetected by home-owners.

Unfortunately, wood and laminate floors require these under-layments to block moisture because they are highly absorbent and prone to warping.

During construction, many new homes have a type of vapor barrier installed under the concrete slab to prevent water from accessing the slab. While effective in the short term, the success of these barriers doesn’t completely solve the problem.

Minor flooding and even regular exposure to rain or pool water at entries is a frequent trouble spot. Water drains between the joints, soaks into the body of the laminate or wood and into the vapor barrier. Laminates swell and peel, wood swells and warps and the barrier becomes a home for mold.

In the long run, under ground vapor barriers deteriorate with time. Plastics break down in the environment, become brittle and disintegrate.

What is the best flooring for Florida?

Porcelain ceramic tile is the best type of flooring for Florida on the ground level of our homes. Concrete slab construction is appropriate for the Florida environment, however, using the right type of flooring is key because concrete slabs absorb water from the ground beneath our homes. Florida’s high water-table isn’t going away. We must adapt to our environment and work with it.

Why is Porcelain Tile a Better Option?

Porcelain tile is impervious and non-absorbent, so water doesn’t affect it. The moisture in the slab beneath the tile escapes and evaporates through grout joints. This moisture is removed from the air in your home by the air conditioning system. Because the moisture isn’t trapped beneath the tile, the possibility of mold is diminished. This is why porcelain tiles are the best flooring for Florida for avoiding trapped moisture and mold development.

During renovations, we’ve encountered multiple types of flooring. In every laminate and wood extraction, all have shown some level of mildew or mold in the flooring or the underlayment.

We’ve never seen signs of mold under a tile floor. Tile floors are usually replaced for a handful of reasons:

  1. Faulty or improper installation
  2. Inferior tile that is failing
  3. Clients desire to upgrade or make aesthetic changes

To hear what Mike Holmes of the hit TV series thinks about wood or laminate on ground level concrete, check out Season 4,. Episode EP4046 “Best Laid Plans”.  Mike Holmes says wood flooring should never be installed on ground level concrete. We agree. If you want natural wood flooring, we suggest using it only on suspended floors. In Florida, this means second floors and higher.

 Want the Look and Feel of Wood?

There are hundreds of porcelain tiles that look like wood available through Atlantic Tile Distribution.  Click here to learn more and see the selection of porcelain tiles we offer. Visit our showroom on Ellis Road to learn more.

  

Original article written in 2009 by Lisa Bogo, updated November 2021