At Legacy Home Improvement, we’re renowned for our detail-oriented approach in providing windows, doors, and siding tailored to the unique coastal climates of Savannah, Hilton Head Island, and Beaufort. Now, we’re proud to bring you the Sunspace Model 400 Insulated Sunroom — a true year-round room addition you can heat and cool, not just a seasonal enclosure.
The Model 400 features high-density foam insulated walls and 3″ aluminum extrusions with commercial-grade thermal breaks to reduce condensation and heat loss. Pair it with Sunspace’s Therma-Deck insulated floor system (available in R17, R26, or R35) to skip costly foundation work while keeping the whole room comfortable in every season.
Product Features
- Fully Insulated Walls: High-density foam insulated walls keep your living space warm and comfortable year-round.
- Thermal-Break Framing: 3" aluminum extrusions with commercial-grade thermal breaks reduce condensation and heat loss.
- Therma-Deck Floor System: Pre-manufactured insulated floor deck (R17, R26, or R35) eliminates costly foundation work.
- Year-Round Comfort: A real addition you can heat and cool, not just a seasonal room.
Patios & Pergolas
Head back to explore our full lineup of custom patios, pergolas, and Sunspace enclosures for coastal outdoor living.
Model 100 – Screenroom
The classic coastal porch enclosure. Sturdy aluminum construction and durable screens for affordable, full-view outdoor living.
Model 200 – WeatherMaster
Combine open-air breeze with enclosed comfort. WeatherMaster vinyl windows slide open for up to 75% ventilation, or close tight against wind and rain.
Model 300 – 3-Season
A bright 3-season glass room built with 2" extruded aluminum and single-glazed glass for durability and natural light.
Request Your Consultation!
Simply provide your contact information and details about your project, and we’ll get back to you as soon as possible to schedule a convenient time for your consultation. We look forward to helping you enhance your home and create your legacy!
Ready to Enhance Your Home?
Contact us today to schedule a consultation and explore the Sunspace Model 400 Insulated Sunroom. Experience the Legacy difference and elevate your home’s outdoor living, comfort, and style.
(912) 255-5558
Monday-Friday : 9AM - 5PM
Saturday: 10AM - 2PM
Sunday: Closed
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frequently asked questions
Questions About the Sunspace Model 400 Insulated Sunroom
The Model 400 is Sunspace’s fully insulated sunroom — high-density foam insulated walls, thermal-break aluminum framing, and an insulated floor system make it a true year-round room addition you can heat and cool.
The Model 300 is a 3-season room built with single-glazed glass. The Model 400 adds insulated walls, thermal-break framing, and an insulated floor system for full year-round comfort in any weather.
Therma-Deck is Sunspace’s pre-manufactured, insulated floor deck, available in 4-1/2″ (R17), 6-1/2″ (R26), or 8-1/4″ (R35) thicknesses. It eliminates the need for costly foundation work and installation labor.
Yes — the Model 400’s insulated walls, thermal-break framing, and insulated floor system are built for heating and cooling, unlike a 3-season room.
Most insulated room additions require a permit. Our team handles the permitting process for you as part of the design and installation plan.
Legacy Home Improvement’s factory-certified installers handle every Sunspace installation, from design through final walkthrough.
Yes, we offer hassle-free financing options. Visit our Financing page or contact us to learn more.
Beyond the Model 400, Sunspace offers the Model 100 (screen room), Model 200 (WeatherMaster vinyl windows), and Model 300 (3-season glass room). See the options below.