Woven Roving

2 products

  • 18 oz woven roving fiberglass folded back on itself, coarse white E-glass bundles in a 0/90 weave with frayed cut edges on the leftClose-up of woven roving fiberglass, white E-glass bundles in a heavy plain weave with a light sheen across the flat tows
    Boat Suppliers

    18oz Woven Roving

    18 oz woven roving is what you lay in when a hull, stringer or transom repair needs thickness...
    $19.44 USD
    $19.44 USD
    $19.44 yd
    Width
    Length
  • Close-up of woven roving fiberglass, white E-glass bundles in a heavy plain weave with a light sheen across the flat tows24oz Woven Roving specifications
    Boat Suppliers

    24oz Woven Roving

    24 oz woven roving is for putting the most glass down per ply on hull bottoms, transoms and...
    $22.39 USD
    $22.39 USD $19.44 USD
    $22.39 yd
    Width
    Length

Woven Roving

Building thickness fast in a hull

Woven roving is the bulk builder. At 18 and 24 oz it lays down more glass per ply than anything short of heavy biaxial, which is why production hulls and mold backing lean on it. Both weights come 50 in wide, the 18 oz in 1, 3 and 10 yard cuts and the 24 oz in 1, 3 and 5 yard cuts.

Run chopped strand mat between roving plies in a polyester laminate. Roving against roving leaves a resin rich layer between two coarse weaves that is a natural crack path, and the mat fills the crimp so the plies key together. Roving is a structural layer, not a finish layer, so skin it with cloth or gelcoat.

Use sharp heavy-duty scissors or shears. Because of its thickness, it may be harder to trim cleanly than lighter fiberglass cloth.

It’s relatively stiff compared to other fiberglass fabrics, but it can still conform to gradual curves with proper wet-out and pressure.

Yes, and you usually should. Woven roving builds thickness fast but has a coarse weave, so it is almost always alternated with chopped strand mat: the mat fills the weave and ties the layers together for a stronger, void-free laminate. A common schedule is mat, roving, mat. Finish with cloth or mat for a smoother surface.

Woven roving works well with polyester, vinyl ester, and epoxy resins. Polyester is common in boatbuilding, while epoxy is preferred for repairs and higher strength applications.

Woven roving is much thicker and heavier than standard fiberglass cloth. It’s used for strength and bulk, while cloth is typically used for finishing or lightweight laminates.

Woven roving is a heavy-duty fiberglass fabric made from continuous strands woven into a coarse, crisscross pattern. It provides high tensile strength and is ideal for structural laminates in marine and industrial applications.

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