The short answer: for standard hand lay-up with unsaturated polyester resin, plan for approximately 1.5 kg of resin per 1 kg of woven roving — a 1.5:1 resin-to-fiber ratio by weight. But that number changes depending on your fabric weight, resin system, and manufacturing process.

The process begins with continuous glass fiber rovings — bundles of thousands of individual glass filaments drawn from molten glass. The linear density (tex value) of each roving bundle directly determines the final fabric weight (g/m²). For example:

Everything you need to know about fiberglass woven roving — types, weight specs, resin compatibility, applications, and how to choose the right grade. From a manufacturer since 2002.

Fiberglass composites are widely used in boats, ships, and aircraft due to their corrosion resistance and lightweight properties.

Fiberglass is a critical material in modern engineering, offering a unique combination of strength, durability, and versatility. Future advancements aim at improving recyclability and reducing production costs.

Fiberglass is revolutionizing the construction industry by offering lightweight, durable, and corrosion-resistant alternatives to traditional materials like steel and concrete.

Fiberglass is playing a crucial role in the shift toward lightweight, fuel-efficient vehicles, particularly in the electric vehicle (EV) sector.

Wind turbine blades rely heavily on fiberglass composites due to their strength, flexibility, and fatigue resistance.

Fiberglass is set to remain a cornerstone of modern engineering, with innovations driving its use in greener, smarter applications.