Complete Guide to Insect Screen Mesh Materials

In this guide, we will explain the differences between insect screen mesh materials, as well as their pros and cons.

Mesh Sizes Explained

Before delving into the specifics of mesh materials, it's crucial to grasp the concept of insect screen mesh sizes.

Mesh size is determined by the number of openings per square inch. For instance, an 18 x 16 mesh size indicates there are 18 openings horizontally and 16 vertically per inch.

How to Measure Insect Mesh Sizes

The mesh size directly impacts the effectiveness of the insect screen. A higher number of openings per square inch results in smaller holes, making it more adept at keeping out smaller insects. Mesh size also influences screen rigidity; tighter weaves with smaller openings reduce the likelihood of sagging.

A standard 18 x 16 mesh effectively prevents larger insects like mosquitoes and flying termites. For protection against tiny insects such as fruit flies, sand flies (also known as biting midges), and drain flies, opt for a 20 x 20 mesh.

Ventilation is another consideration when selecting mesh size. Larger openings enhance airflow but may permit smaller insects to pass through. Conversely, smaller openings restrict tiny insects while marginally reducing airflow.

Irrespective of mesh size, opting for lightweight mesh enhances airflow through the insect screen.

Mesh Colour – Does It Matter?

The colour of an insect screen mesh plays a significant role beyond mere aesthetics. While some may prefer a mesh colour that blends with interior décor, the practical considerations go deeper. For instance, a white mesh against a white window frame may seem appealing but is not recommended due to visibility issues.

Black

Black mesh is highly favored by homeowners for its ability to absorb light effectively. This results in superior outward visibility and excellent UV protection. It reduces sun glare, providing a clear view through the screen. Additionally, black mesh is the least noticeable of the three colours, often achieving an "invisible" effect.

White

In contrast, white mesh reflects light, diminishing outward visibility and offering minimal UV protection. It tends to be the most visible and imparts a "translucent" appearance. However, white mesh diffuses light well, which can be advantageous for achieving even room lighting. Despite this, white mesh is generally less popular than black or grey.

Grey

Grey mesh provides benefits similar to black mesh but to a lesser extent, as grey objects do not absorb light as effectively as black. The visibility of grey mesh varies with sunlight; it may be less noticeable during the day but becomes more visible at night.

Each colour choice—black, white, or grey—affects visibility, UV protection, and overall aesthetics, making it essential to consider these factors when selecting an insect screen mesh colour.

Comparison of Insect Screen Mesh Materials

Strength, durability, cost and outward visibility are some of the considerations to keep in mind when choosing mesh material. The right mesh material will depend on which factors matter more to you.

Fiberglass

Fiberglass is one of the most commonly used mesh materials for insect screens. The reason for its popularity is simple – it is inexpensive and offers good outward visibility. Fiberglass is also lightweight, flexible and corrosion-resistant. Some manufacturers may coat the fiberglass with PVC to improve its strength.

The greatest disadvantage of fiberglass is that it’s not as durable as other mesh materials. It is prone to tearing/fraying at the edges and tends to stretch over time. When exposed to strong sunlight for long periods of time, its strength will deteriorate and discolouration may also occur.

Pros:

Cheap

Good outward visibility

Lightweight

Flexible

Cons:

Prone to tearing/fraying

Stretches over time

Not as durable, needs to be replaced more frequently

Strong UV rays result in discolouration and reduction in strength

Polyester

Polyester mesh has become increasingly popular as a substitute for fiberglass mesh due to its flexibility, tear resistance, and reduced tendency to sag, making it stronger and more durable. Typically coated with vinyl, polyester mesh offers an additional layer of protection. In applications like pet screens, polyester mesh with a thicker vinyl coating enhances resistance to abrasions, making it challenging for pets to damage.

However, polyester mesh has drawbacks. The thick vinyl coating diminishes outward visibility, and it tends to be more costly than fiberglass. Opting for vinyl-coated polyester entails a higher expense.

Polyethylene (PE) / Polypropylene (PP)

Polyethylene (PE) and polypropylene (PP) have gained popularity as mesh materials in recent years. These plastics share similar physical properties and are widely used in various applications. In screen mesh, they are available as PE mesh, PP mesh, or a combination of both (PE + PP mesh).

Both PE and PP are robust fabrics, resistant to tearing and less prone to sagging. PE serves as a good electrical insulator and is slightly stronger than PP. On the other hand, PP offers higher chemical resistance and is lighter in weight. Both materials are mildew-resistant and provide excellent outward visibility. Similar to polyester mesh, most PE/PP mesh is coated to enhance durability, UV resistance, and waterproofing.

Despite their strengths, PE/PP mesh has limitations. It is less suitable for pet screens due to its thinner coating, which reduces resistance to scratches and damage caused by pets. Additionally, PE/PP mesh tends to be more expensive than fiberglass mesh.

Aluminium

Another material used for screen mesh is aluminium. While popular in countries like Australia and the USA, aluminium mesh is less common in Singapore. Aluminium mesh offers exceptional strength, durability, and excellent outward visibility. Its inherent rigidity prevents sagging, and it is resistant to tearing. The mesh is often coated with a protective finish that enhances corrosion resistance.

However, aluminium mesh is notably expensive. It can also dent or crease upon heavy impact, which may affect its appearance and longevity.

Stainless Steel

Lastly, stainless steel mesh stands out as the strongest and most durable material available. It boasts rust and corrosion resistance, ensuring longevity and maintaining excellent outward visibility without stretching or sagging. Some stainless steel meshes are powder-coated for a black finish, further enhancing visibility.

However, stainless steel mesh is significantly expensive due to its high-quality material. It may also dent or kink under heavy impact, which can affect its appearance and performance over time.

Summary

With numerous options to consider, selecting the right mesh material can feel daunting. Our advice is to prioritize your specific needs and preferences when making a decision. For instance, if affordability is a key factor, fiberglass is often the most economical choice that still meets basic requirements.