Why Wire Mesh Is Essential For Concrete Patios

When it comes to concrete patios, the question of whether to use wire mesh or rebar for reinforcement is a common one. While some contractors may claim that wire mesh is unnecessary, especially for smaller projects, others argue that the small amount of extra effort and cost involved in installing mesh outweigh the potential hassle and cost of future repairs. Ultimately, the decision comes down to a variety of factors, including the size and scope of the project, local building requirements, and the type of soil and ground conditions.

Rebar vs wire mesh

When it comes to reinforcing concrete, there are two main options: rebar and wire mesh. Both are used to reinforce concrete and prevent cracking, but there are some key differences between the two.

Rebar

Rebar, or reinforcing bar, is a steel rod that comes in different thicknesses and is usually ribbed for better grip. It is typically made of recycled or virgin carbon steel and comes in two main types: plain and deformed. Deformed rebar has ribs and lugs along the exterior, which help to grasp the cement and keep it in place. This type of rebar is often better for reinforcing driveways than the smooth wires of wire mesh, as it can support the weight of heavy vehicles.

Wire Mesh

Wire mesh, on the other hand, is made up of wires that are welded or galvanized together into a flat sheet with a square, grid-like pattern. Like rebar, it comes in varying sizes and thicknesses, and it is typically made of stainless steel. Wire mesh is used to reinforce concrete slabs, reduce shrinkage, and prevent cracks from spreading once the concrete has set. It is often used in private roadways and patios, as it can support the load of light foot traffic and outdoor furniture.

For a concrete patio, either rebar or wire mesh can be used. Patios only need to support light foot traffic and outdoor furniture, so they typically do not require the same level of reinforcement as a driveway. Wire mesh is often sufficient for a patio, but rebar can also be used for extra strength. Some people choose to use a combination of both rebar and wire mesh for their patios to get the benefits of both materials.

Factors to Consider

When deciding between rebar and wire mesh for a concrete patio, there are a few factors to consider. First, it is important to ensure that the sub-base is prepared and compacted correctly, as this will help prevent cracking. Additionally, the type of ground and soil under the concrete slab should be considered, as softer or spongy ground may require extra reinforcement. Finally, it is worth noting that wire mesh is typically easier to work with and more budget-friendly than rebar.

When is wire mesh necessary?

Wire mesh is not always necessary, but it is recommended for larger projects or slabs that may need extra support or strength. Wired mesh can also help resist cracking.

For example, if you are building a concrete patio, using both rebar and wire mesh will reinforce your patio and help reduce cracking over time. While wire mesh alone can provide sufficient reinforcement for a patio, adding some rebar will strengthen it further.

If your project involves a driveway or any area that needs to carry a heavy load, it is highly recommended to use both rebar and wire mesh for extra reinforcement. The additional support will help the concrete withstand the weight and traffic of vehicles.

Additionally, consider the ground conditions. If you are working on softer or spongy ground, wire mesh can provide extra reinforcement for the slabs.

In some locations, reinforcement may be required by building codes or regulations, regardless of the size or scale of the concrete structure. This is particularly true for certain public buildings.

It is important to carefully review the plans, building requirements, and local regulations to determine the specific needs of your project and whether wire mesh is necessary.

Pros and cons of wire mesh

Wire mesh is often used in concrete patios to reinforce the structure and prevent cracking. However, it is not always necessary, and there are some pros and cons to consider when deciding whether or not to use wire mesh in your concrete patio project.

Pros of Wire Mesh in Concrete Patios:

• Reinforcement and Crack Prevention: Wire mesh provides additional reinforcement to the concrete, helping to reduce the likelihood of cracking over time. It can be especially useful for patios that will bear heavy loads, such as vehicles or large furniture.
• Cost-Effective: The cost and labour of installing wire mesh are generally considered negligible compared to the total cost of the patio. Adding wire mesh can help prevent future repairs, which may be costly and time-consuming.
• Flexural Strength: While wire mesh does not provide structural reinforcement, it can add flexural strength to the concrete while it is in its "green" or early curing stage. This can be beneficial for concrete that needs to withstand heavy loads, such as vehicle traffic.

Cons of Wire Mesh in Concrete Patios:

• Not Always Necessary: For smaller projects with light foot traffic, such as a residential patio or pathway, wire mesh may not be necessary. The additional reinforcement may be overkill for projects that do not require heavy load-bearing capabilities.
• Installation Challenges: Properly installing wire mesh requires placing it at the vertical midpoint of the concrete slab, which can be challenging. It needs to be supported and fixed in position during the concrete pour, adding extra steps and costs to the installation process.
• Potential for Rusting: One concern with wire mesh is the potential for rusting due to moisture and salt levels in the environment. This can lead to expansion of the mesh and subsequent damage to the concrete. However, this is more of an issue in arid climates with higher salt levels.

In summary, wire mesh can be a beneficial addition to concrete patio projects, especially those bearing heavy loads. However, for smaller, residential patios, it may not be necessary, and there are installation and rusting concerns to consider. Ultimately, the decision to use wire mesh should be made based on the specific requirements and conditions of your patio project.

Alternatives to wire mesh

Wire mesh is often used in concrete patios to reinforce the structure and prevent cracking. While it is not always necessary, it is a good idea to use some form of reinforcement, especially if the patio will be subject to heavy use. If you choose not to use wire mesh, there are a few alternatives you can consider:

Rebar

Short for "reinforcing bar," rebar is typically made of recycled or virgin carbon steel. It is available in two main types: plain and deformed. Deformed rebar has ribs and lugs along the exterior, which help to grasp the cement and keep it in place. Rebar is stronger than wire mesh and is often used in commercial projects or thicker driveways that entail more traffic. It takes up more room than wire mesh and is more expensive, but it provides excellent support for heavy loads.

Synthetic Fiber

Synthetic fiber is a budget-friendly alternative to wire mesh that can be effective at minimizing shrinkage in concrete. However, it does not have the same structural strength as wire mesh or rebar. Synthetic fiber may be suitable for a concrete patio that will only be subject to light foot traffic and outdoor furniture.

Fiber Mesh

Fiber mesh is another option for reinforcing concrete. Polymer fibers are straightforward to use, reduce the need for on-site labor, and resist corrosion. Fiber mesh is also usually more affordable than wire mesh. However, it may not provide the same level of strength and durability as wire mesh or rebar.

No Reinforcement

If your concrete patio is small and will not be subject to heavy use, you may not need any reinforcement at all. For example, if you are creating a residential pathway or shed floor, the concrete may be strong enough on its own without the need for wire mesh or other reinforcement.

When choosing an alternative to wire mesh, it is important to consider the size, use, and weight-bearing requirements of your concrete patio. Each option has its own advantages and disadvantages, so be sure to select the one that best suits your specific needs.

Cost of wire mesh

The cost of wire mesh depends on several factors, including the size and scope of the project, the type and thickness of the wire mesh, and the labour required for installation.

Wire mesh is typically sold by the roll or sheet and is available in various sizes and thicknesses. For example, The Home Depot offers a 42" x 84" Remesh Sheet and a 5 ft. x 150 ft. Steel Mesh Roll. The price of wire mesh can vary depending on the thickness and quality of the steel used. Thicker wire mesh, such as 1/8" (4 mm), will generally be more expensive than thinner options.

When it comes to installation costs, wire mesh is generally less labour-intensive than rebar. Rebar installation requires placing the bars independently and tying or welding each intersection, while wire mesh can be quickly unrolled or inserted into the slab. As a result, wire mesh can be a more cost-effective option for projects with tight deadlines or budgets.

In some cases, the ground may need to be prepared before installing a concrete patio, such as by adding gravel for drainage. This preparation work can add to the overall cost of the project. It is important to carefully review the plans and consider any additional costs that may be incurred during the installation process.

When deciding between wire mesh and rebar for a concrete patio, it is essential to consider the specific requirements of the project. While wire mesh is generally less expensive and faster to install, rebar provides more strength and support. For larger or heavier-load projects, rebar may be the better option, while wire mesh may be sufficient for smaller residential applications.

Frequently asked questions