Your Nationwide Sunroom Installation Experts

Ready to turn wasted space into living space? We'll design, manufacture, and install your perfect sunroom, enclosure, patio cover, and more!
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C-Thru Sunrooms and Additions: A Valuable Home Investment

Our products are more than just beautifully expanded living areas. They're also incredibly energy-efficient and guaranteed for life.


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What Makes C-Thru Sunrooms Stand Out?

The industry has changed a lot over the last 70 years, but our commitment to quality and value hasn’t!

Certified Quality

Certified Quality

Our American-made windows and doors meet the International Building Code and are IAPMO approved.
Superior Features

Superior Features

Our frames, cladding, glass panes, and other features are engineered for strength and efficiency in any climate.
Custom Designs

Custom Designs

Every component of your new sunroom will be designed just for you: the foundation, walls, roof, windows, and doors!
Full Engineering

Full Engineering

Site-specific engineering guarantees a sunroom addition that's structurally sound and compliant with local codes.


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Limited Lifetime Warranty

Finest Warranties

With us, it's simple: the best sunrooms are covered by the industry's best fully transferable lifetime warranty.

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The Original Sunroom Manufacturer

Made In The USA

Founded in 1947, C-Thru Sunrooms is one of the oldest sunroom manufacturers in the country. We’ve achieved success over the last seven decades by constantly improving our products and services, delivering cutting-edge technology backed by the industry’s best warranties and the caring touch of a family-owned business. Wherever you call home, our custom-built home additions are here to make it as spacious, energy-efficient, and beautiful as you’ve always wanted.



With our network of nationwide sunroom installation dealers, you’re never far from a C-Thru Sunrooms expert. Contact us today to see why hundreds of thousands of homeowners couldn’t be happier!