At Decoro, we use GFRC for architectural trim details like columns, cornices, pilasters, brackets, and surrounds, especially when clients need intricate, large-scale, or fire-resistant features without relying on heavy structural support.
Why GFRC is a Smart Choice for Architectural Trim
GFRC is one of many exterior trim material types. So what makes it a good option? It’s engineered for longevity and performance. The embedded glass fibers give it excellent tensile and flexural strength, which resists cracking and breakage over time. That’s especially important for trim pieces subject to movement, vibration, or exposure to the elements.
It’s also:
Fire-resistant and non-combustible
Highly weather-resistant, able to withstand freeze-thaw cycles, moisture, and UV
Versatile, with the ability to replicate stone, limestone, or custom profiles
Lighter than traditional precast, reducing installation labor and structural demands
GFRC is especially well-suited for institutional, commercial, and high-end residential buildings, where longevity, aesthetic precision, and reduced load are critical.
How GFRC trim is made
There are a few ways to manufacture GFRC, but most trim pieces are made using one of three methods:
Spray-up method
The strongest method, using long glass fibers sprayed into a mold with a fluid concrete mix. It produces high fiber loading and strength.
Premix (direct cast)
Fibers are mixed directly into the concrete and poured into molds. More affordable, but results in slightly less structural strength.
Hybrid method
A face coat is sprayed into the mold, followed by a fiber-filled backer mix. This offers a balance of performance and cost.
We carefully select the right method based on each piece's complexity, size, and structural needs.
What makes GFRC ideal for high-end and historic projects
Because of its moldability and finish options, GFRC can replicate classical materials like terra cotta, limestone, sandstone, or cast stone without the cost or weight. We often recommend GFRC for:
Historic replications
Lightweight cornices and columns
Custom signage and branded architectural elements
Decorative cladding or façade panels
Decoro can assist in evaluating site conditions and incorporating concealed fastening methods in the final product. The result is a facade solution with a premium look and feel, , that holds up to the environment, and with a simplified installation.
Does GFRC trim expand and contract?
Yes, but far less than materials like wood or standard concrete. GFRC is stable in various temperatures and won’t warp, twist, or crack from seasonal changes. Proper installation accounts for minimal thermal movement, making it a reliable choice for exterior trim in all climates.
Can you paint GFRC trim?
Yes. GFRC trim can be painted, stained, or finished to match your design needs. Our GFRC trim is often pre-colored during casting, but it can also be top-coated with mineral paints or other breathable coatings. Finishing options include smooth, textured, or stone-like surfaces.
Is GFRC right for your project?
If you need architectural trim that combines strength, design flexibility, and long-term performance, GFRC is worth considering. It’s especially valuable for:
Large or custom-shaped components
Fire-rated construction
Replicating historic profiles
Reducing structural load or installation time
Need help determining whether GFRC is the right fit? Get in touch, and we’ll help you weigh the options and choose the right material for your project.