6 Problems with Stone Veneer Siding

With texture and natural colors topping the list of trends for home exteriors today, many homeowners are turning toward stone veneer siding as a way to enhance their curb appeal. And when done right, stone veneer can have an attractive appearance that really livens up a home’s exterior looks. Unfortunately, stone veneer is rarely done right, and often comes with a load of issues that can lead to problems for homeowners down the road. If you’re thinking about stone veneer on your home, be sure to consider these six problems before you buy.

1. Moisture Issues

While it’s called stone veneer or stone siding, the latest product on the market today isn’t really stone at all. It’s a type of stucco that has been colored and textured to give you the look and feel of real stone, but without the weight of the expense.

Unfortunately, this means that the material is subject to all the same issues that stucco has, however, including moisture problems. Stone veneer siding needs to be installed properly to manage moisture, including leaving a 4-inch gap from the ground, installing a foundation weep screed, and a 2-inch gap to any paving, such as steps or patios. These things are rarely installed, however, which means that the bottoms of the stone veneer where it meets the ground often begins to rot. This rot spreads upwards if left unchecked, until the entire installation has been compromised.

2. Leaks

Sometimes the biggest problem that arises from the use of manufactured stone veneer siding isn’t the finish itself, but the damage to a home’s interior. A lot of the work that goes into the installation of this material is focused on its looks – not on its performance. And while the material is made to resemble stone, it actually needs to be treated like a stucco or a concrete, with a rainscreen and vapor barrier installed beneath it.

Failure to do so leads to the most commonly reported problem by homeowners who have it installed; leaks and moisture damage inside. Mold, wood rot, and constant signs of moisture on the interior of the walls that have the stone veneer installed are all very common issues that can be expensive and difficult to address.

3. Vent Problems

Your siding has many different penetrations or protrusions across its surface caused by the addition of things like fans and vents. Your dryer, bathroom fan, and kitchen hood all need to vent somewhere, and this is often right out through the walls of your home.

With a normal siding, these vents are set up against a bed of sealant. But with stone veneer, they’re often pressed right into the mortar itself. This leads to a couple of different problems. One, mortar doesn’t flex the way that sealant does, which means that any settling or movement of the house could cause the vent cover to crack or break. This in turn leads to the second problem; if the vent cover is broken, and its edges are set in mortar, how are you meant to replace it? So many homes that have stone veneer siding, also have cracked and broken vent covers. This can lead to other issues such as allowing pests such as raccoons or bats to infiltrate your home.

4. Roofing Issues

Stone veneer siding is very susceptible to moisture. Therefore, it not only needs to be installed a few inches up from the ground, but also about 2-inches up past the edge of your roofing material as well. Unfortunately, it’s often installed butted right up against the shingles on your roof. This causes the moisture to seep beneath your roof shingles, as well as beneath the veneer. Now, your roof deck may become compromised, and your shingles may deteriorate a faster rate, leading to the need for a roof replacement. Keep in mind that if enough water seeps beneath the shingles, this can also lead to significant water damage inside your attic and home as well.

5. Mold

While most people think of stone veneer as a type of masonry product, and many installers and building inspectors treat it this way, it’s actually more similar to a sponge than to a true piece of stone. Stone veneer is highly absorbent, pulling in not only moisture from high humidity areas, but also water from rain and snow. And it holds onto this moisture firmly, particularly if it has been installed straight up against the house without benefit of a rainscreen to help relieve some of the moisture from behind.

The result is often an overgrowth of mold, both inside the home and directly beneath the veneer. Often times, this mold is not found until it has already colonized and spread, causing health problems and significant damage to the home’s structure.

6. Leaking Windows and Doors

Even if a rainscreen is used with the veneer, you may still find that you have leaks and water infiltrating your home from around windows and doorways. Two to three times the amount of caulk is necessary to install the veneers around windows and doors to seal them properly. And a significant gap needs to be left between the masonry and the window or door frame. This is often considered unattractive, which means the veneer is usually installed close up against the frame. This means that an insufficient amount of caulk is used, leading to water and leaks in these areas.

Make a Better Choice

If you want texture and interest on your home’s exterior, consider another choice instead. Stone veneer may look attractive, but it’s incredibly difficult to install properly, leading to these and other issues over time. Consider a better product for your home, such as fiber cement siding, and avoid the problems associated with stone veneer.