THE ONLY FULLY INEGRATED FIBERGLASS DOOR MANUFACTURER IN THE WORLD.
For decades, MASTERGRAIN has quietly built premium fiberglass-cladded door components for some of North America’s most respected brands — powered by proprietary tooling, large-format molds, and state-of-the-art fiberglass manufacturing.
Today, MASTERGRAIN manufactures design-forward fiberglass door panels that are:
- Designed for faster, easier manufacturing, reducing labour, shortening lead times, and improving margins.
- Our broad custom sizing and design capabilities let you say yes to more projects, win more business, and command higher margins.
- As a fully integrated manufacturer—from tooling to finished panels—we control the entire development process and can partner with you to bring new product ideas to market faster.
If fiberglass doors are on your roadmap — or even a strategic question — a short conversation could be worthwhile.




