Sunroom Installation · St. Louis Metro Area
Custom Sunroom Installation in
St. Louis Metro Area
Stop watching your patio sit empty for half the year. Whether you want a relaxed 3-season space for spring through fall or a fully insulated room you can use in January, Sunspace USA designs and installs custom sunrooms built around your home, your site, and how your family actually spends its time.
- 3-Season and 4-Season Options
- Authorized Sunspace Dealer
- Custom-Built, Factory Warranted
Get a Free Sunroom Quote
Your local sunroom installer serving the St. Louis Metro Area area.
- Custom sunroom installation on patios, decks, and porches
- Model 200, 300, and 400 Sunspace systems available
- 3-season vinyl, 3-season glass, or 4-season insulated
- Free site consultation and custom design
Sunspace USA
Your Outdoor Space Has More Potential Than the Weather Allows
Missouri gives you four genuine seasons, which sounds like a benefit until you realize that summer heat arrives in May, humidity lingers through September, spring storms show up without warning, and fall evenings cool off faster than anyone wants. For most homeowners, that leaves a frustratingly short window when an open deck or patio is actually comfortable to use.
A properly designed sunroom changes that equation entirely. It gives your household a protected, naturally lit space that connects to the outdoors without being controlled by whatever the weather decides to do that afternoon.
More Months of Comfortable Use
Enjoy outdoor living from spring through fall with a 3-season room, or year-round with a 4-season model built for February mornings.
Protection From Missouri Weather
Sunrooms protect you and your furniture from UV rays, storms, and humidity while maintaining a clear view of your yard.
Functional Square Footage Added to Your Home
Adds functional living space and measurable resale appeal without the expense or disruption of a full structural addition.
Natural Light Without the Tradeoffs
Glass and ViewFlex vinyl panels bring in natural light, providing the outdoor feeling without the insects, wind, or rain.
Three Sunroom Systems. One Authorized
St. Louis Metro Area Installer.
Every project starts with a conversation about how you want to use the space. Sunspace offers three distinct systems, each with a
different level of enclosure, insulation, and seasonal performance. We help you choose the one that fits your home, your budget, and your goals.
Flexible, Ventilated, and Built for Three Full Seasons
The Model 200 is the right starting point for homeowners who love fresh air but want real protection from bugs, sudden rain, and summer UV. ViewFlex vinyl WeatherMaster panels give you adjustable ventilation up to seventy-five percent open, so you control the airflow rather than the weather controlling your plans. It is also the most practical option for installation under an existing porch roof, which means many St. Louis Metro Area homes can add a Model 200 without any structural changes to what is already there.
Features & Benefits
- Up to 75% ventilation WeatherMaster panels slide up, down, or stack in the center for fully adjustable airflow on any given day.
- ViewFlex vinyl glazing More impact-resistant than glass, virtually maintenance-free, and proven over more than forty years of residential installations.
- Four vinyl tint options Clear, Smoke Gray, Dark Gray, and Bronze to match your light, privacy, and heat preferences.
- Full fiberglass mesh screen Keeps insects out when the panels are open during Missouri’s warm months.
- 2-inch foam panel walls Lightweight and thermally efficient, ideal for under-existing-roof applications on porches and covered patios.
- Multiple window configurations Single V4-Track, French Garden Door, Single, Stereo Double, and Stereo Triple window systems to fit any opening width.
- Adaptable design Works as well with a newly constructed deck as it does retrofitted into an existing covered porch.
- Factory-backed warranty All components covered by the Sunspace manufacturer’s warranty from day one.
THERMADECK FLOOR OPTION
Pre-manufactured insulated floor panels available in 4.5-inch, 6.5-inch, and 8.25-inch thickness options at R17, R26, and R35 insulation ratings. Ready to accept tile, laminate, carpet, or hardwood. No costly subfloor framing required.
Available Frame Colors
Aluminum Standard
White
Black
Driftwood
Bronze
Gray
Vinyl Window Tints
Clear
Smoke
Dark Gray
Bronze
Quick Specs
WALL SYSTEM
2-inch foam panels with WeatherMaster extrusions
VENTILATION
Up to 75% open
GLAZING
ViewFlex vinyl (40+ yr durability)
BEST FOR
Spring, summer, and fall use
Download Brochure
EXPERT INSIGHT
The Model 200 suits Missouri homeowners who want the option to fully open the room on a perfect April evening and button it up completely when a thunderstorm rolls in. The four-track system handles Missouri’s humidity and temperature swings better than a standard single-pane glass enclosure, and the low-profile under-roof installation means many projects require far less site prep than homeowners expect.
A Glass-Forward Room That Feels Like Part of the House
The Model 300 steps up the architectural finish with 2-inch extruded insulated aluminum pillars and single-glazed glass panels that create a bright, room-like environment through three full seasons. This is the model for homeowners who want the clarity and permanence of glass rather than vinyl, and who prefer a space that reads visually as a proper room addition from both inside and outside the home.
Features & Benefits
- 2-inch extruded insulated aluminum pillars Structural strength and dimensional stability with a clean, maintenance-free finish that holds up to Missouri weather without painting or sealing.
- Single-glazed glass walls Maximum natural light and unobstructed outdoor views that make the room feel open and connected regardless of the season.
- Double-roller windows Both sashes operate independently with no fixed side, delivering ventilation from both sides of every window unit.
- Multiple roof system options Cathedral ceiling, studio pitch, and contemporary flat configurations to match your home’s existing roofline and architecture.
- High-density foam core roof Laminated with aluminum skins on both sides or OSB for a combination of structural strength and insulating performance.
- Integrated gutters and fascia Extruded heavy-duty aluminum built into the system from the start, not added as an afterthought.
- 4-inch or 6-inch roof thickness options Snow load, roof projection, and R-value are calculated into the custom design for every St. Louis Metro Area site.
- Five frame color options White, Black, Driftwood, Bronze, and Gray for a clean, complementary match to your home’s exterior.
THERMADECK FLOOR OPTION
Available in R17, R26, and R35 ratings. Also serves as a roofing panel with shingles on the exterior and a choice of interior ceiling finish options, eliminating the need for costly framing labor.
Available Frame Colors
Aluminum Standard
White
Black
Driftwood
Bronze
Gray
Quick Specs
WALL SYSTEM
2-inch insulated aluminum pillars with glass
ROOF OPTIONS
4-inch or 6-inch insulated, cathedral or studio pitch
GLAZING
Single-glazed glass
BEST FOR
Spring through fall, glass-forward architectural look
Download Brochure
EXPERT INSIGHT
St. Louis Metro Area homeowners who want a space that looks and feels like a real room rather than an enclosed porch consistently choose the Model 300. The glass walls bring in noticeably more light than vinyl, and the double-roller ventilation system is one of the most practical setups for Missouri’s warm spring and fall afternoons when you want the room open but not unprotected.
A True Year-Round Room That Performs in Every Missouri Season
The Model 400 is the top of the Sunspace lineup and the right choice when you want a room that functions identically in July and January. Three-inch high-density foam walls, commercial-grade thermal breaks engineered into every aluminum extrusion, and Low-E Argon gas windows deliver a level of thermal performance that supports HVAC connection and genuine year-round occupancy. This is not an extended seasonal space. It is a room addition that happens to have a view.
Features & Benefits
- 3-inch high-density foam panel walls Superior thermal resistance that keeps the room comfortable across the full range of Missouri seasonal temperatures.
- 3-inch heavy-gauge aluminum extrusions Structural integrity engineered for wind, snow, and load conditions specific to your site and local building code.
- Commercial-grade thermal breaks Built into every extrusion to eliminate condensation points and prevent heat transfer at the frame level throughout the year.
- Low-E Argon gas windows High-efficiency insulated glass that blocks radiant heat transfer and UV penetration while maintaining clarity and natural light.
- Patio Room Wall option 2-inch foam panels with heavy-gauge extrusions for homeowners who want the Model 400 structure at a lower initial investment.
- ThermaDeck insulated floor system Pre-manufactured panels ready for finished flooring installation without subfloor framing.
- Full year-round design intent Every component in the Model 400 is selected for twelve-month comfort, not seasonal extension.
THERMADECK FLOOR OPTION
Available in R17, R26, and R35 insulation ratings. Strong enough to function as a roofing panel with shingles on the exterior and multiple interior ceiling finish options.
Available Frame Colors
Aluminum Standard
White
Driftwood
Quick Specs
WALL SYSTEM
3-inch foam panels with thermal-break extrusions
WINDOWS
Low-E Argon gas, high-efficiency insulated glass
THERMAL BREAKS
Commercial grade on all extrusions
BEST FOR
Year-round occupancy, all four Missouri seasons
Download Brochure
EXPERT INSIGHT
When a homeowner wants the room to feel exactly like the rest of the house in the middle of winter, the Model 400 is the answer. The Low-E Argon glass and thermal-break extrusion system are standard inclusions here, not premium upgrades. Homeowners who connect HVAC to this room report that the temperature and comfort level inside are indistinguishable from their home’s main living areas on even the coldest Missouri days.
Not Sure Which Sunroom Fits Your Home?
Start Here
Feature
Model 200 — WeatherMaster V4T
Model 300 — Glass 3-Season
Model 400 — Insulated (4-Season)
Seasonal Use
Spring, summer, fall
Spring, summer & fall
Year-round
Wall System
2-inch foam with WeatherMaster vinyl
2-inch insulated aluminum with glass
3-inch foam with thermal-break aluminum
Glazing Type
ViewFlex vinyl, 40-plus year durability
Single-glazed glass
Low-E Argon gas insulated glass
Ventilation
Up to 75% open
Double-roller, both sashes
Weather-sealed, climate controlled
Thermal Performance
Good
Good
Excellent
Frame Colors
5 (White, Black, Driftwood, Bronze, Gray)
5 (White, Black, Driftwood, Bronze, Gray)
2 (White, Driftwood)
Best For
Open-air flexibility with weather protection
Glass-forward architectural look
True four-season room
Upgrade From
Model 100 Screen Room
Model 200
Top of the Sunspace range
Not sure which model fits your space?
Our site consultations are free and include a review of your porch, patio, or deck footprint, your existing roof structure, and a clear recommendation based on how you plan to use the room. No obligation required.
What Sets Sunspace USA Apart in
St. Louis Metro Area
Authorized Sunspace Dealer
We install Sunspace systems custom-manufactured to exact specifications, eliminating on-site fabrication, improvised framing, and guesswork.
We Know Missouri Conditions
Designs account for Mid-Missouri’s hot summers, cold winters, humidity, and local building codes, ensuring long-term performance.
Single Team, Start to Finish
You work with one point of contact from start to finish, eliminating subcontractors, handoffs, and confusion about responsibility.
A System Designed to Grow
Sunspace systems offer clear upgrade paths, ensuring your initial investment never closes the door on future improvements.
Backed by Manufacturer Warranties
Factory warranties cover materials and structural elements, supplemented by our installation workmanship guarantee, which doesn’t expire.
Full Outdoor Living Scope
We handle decking, railings, patio covers, pergolas, and privacy walls, ensuring your full outdoor project fits together.
What Homeowners Say
Sunroom Installations Across
the St. Louis Metro Area
“We added WeatherMaster windows to our porch and it changed the whole way we use the house. We can finally sit out there on windy days without everything blowing around.”
Homeowner · Point Pleasant, NJ
“The vertical 4-track system was exactly what we needed. Tons of airflow when open, zero bug issues in the evening, and it still feels like an outdoor room.”
Homeowner · Brick Township, NJ
“We chose the horizontal sliders because they were simple and clean looking. The install was fast and the porch feels much more finished now.”
Homeowner · Toms River, NJ
How a Sunspace USA Sunroom Installation Works
01
Free Site Consultation
We assess your existing space and honestly discuss its function and potential, with no pricing pressure or sales scripts.
02
Custom Design
Custom design addresses your structure and priorities, letting you select the model, color, roof, glazing, and floor system.
03
Factory Manufacturing
Custom-manufactured to exact specifications, your room components fit precisely, eliminating on-site trimming or measurement errors.
04
Professional Installation
Our team fits every component with precision, ensuring the finished room feels like a permanent, intentional part of your home.
Common Questions About Sunroom Installation in St. Louis Metro Area
Here are the questions we hear most often from St. Louis Metro Area homeowners exploring sunroom installation for the first time.
A 3-season model, either the Model 200 or Model 300, is designed for comfortable use from spring through fall. It provides solid weather protection and excellent ventilation but is not engineered for sustained sub-freezing temperatures. A 4-season model, the Model 400, uses 3-inch insulated foam walls, commercial-grade thermal breaks in every extrusion, and Low-E Argon gas windows to hold comfortable temperatures year-round with HVAC support.
Yes. Sunspace modular systems are specifically engineered to install directly onto existing concrete patios, wood decks, and under previously built porch roofs. Many St. Louis Metro Area homes can accommodate a Model 200 or Model 300 with minimal site preparation.
Most sunroom installations are completed within a few days of on-site work once materials are delivered. Total project timeline from consultation to completion varies based on model, permit processing in your municipality, and site conditions.
Yes. The Sunspace system supports a full range of door and window configurations including bifold doors, French Garden Doors, and Stereo Triple window systems. These are selected during the design phase and manufactured to your exact opening dimensions.
Not always. Many installations go directly onto an existing concrete slab or structurally sound wood deck. If reinforcement or new decking is needed, we identify that during the site visit and include it in your project scope before any work begins.
Yes. We regularly combine sunroom installations with aluminum railings, louvered pergola systems, and privacy wall panels as part of a single coordinated project so every outdoor element fits together properly.
A patio cover is a strong option for homeowners who want protection from rain and UV without adding walls. Sunspace offers acrylic, insulated, and hybrid patio cover systems that can stand alone or serve as a future foundation for a full enclosure.
We serve homeowners throughout the greater St. Louis and eastern Missouri region, including Warrenton, Wentzville, O’Fallon, St. Charles, Washington, Troy, Lake St. Louis, Hermann, Foristell, Wright City, and surrounding communities. Contact us if your town is not listed.
Start Your St. Louis Metro Area Sunroom Project
With a Free Consultation
Find out what a custom sunroom can do for your home and your family’s daily life.
We will come to your property, review your space honestly, walk you through the
right model for your goals, and give you clear pricing with no pressure and no obligation.