MOUNT PLEASANT, SC • FAMILY-OWNED
Patio Enclosures for Mount Pleasant & Charleston Homes
Turn the covered space you already have into a room you’ll actually use.
Coastal Shield Window transforms existing covered patios and porches into comfortable enclosed spaces with high-performance windows, exterior doors, and thoughtful design built for Lowcountry living.
✓ We enclose existing covered patios and porches. We do not build ground-up sunroom additions.
✓ Local & Family-Owned
✓ Owner-Led Design
✓ Impact & Non-Impact Options
✓ No High-Pressure Sales
EXPLORE PATIO ENCLOSURES
MAKE MORE OF THE SPACE YOU ALREADY HAVE
Why Enclose an Existing Patio or Porch?
A covered patio or screened porch can be one of the most underused spaces in a Lowcountry home. Enclosing it with windows and doors can make it more comfortable, cleaner, and easier to enjoy through more of the year without changing the footprint you already have.
Use It More Often
Reduce the impact of heat, humidity, wind, pollen, and bugs so the space feels less seasonal and more like part of your everyday home.
Keep It Cleaner
An enclosed space helps keep outdoor furniture, floors, and finishes protected from blowing rain, leaves, pollen, and everyday outdoor mess.
Create a More Flexible Room
Use the space for dining, relaxing, entertaining, a play area, home office, or simply another comfortable place for the family to gather.
If you already have a covered patio or porch, you may be closer to a comfortable enclosed room than you think.
DESIGNED AROUND YOUR HOME
Patio & Porch Enclosure Options
There isn’t one standard way to enclose a covered porch or patio. The right design depends on how you want to use the room, how much ventilation you want, your storm-protection needs, and the architecture of the existing space.
Glass Patio Enclosures
Replace open screening with high-performance windows and exterior doors to create a brighter, more protected space while preserving views and natural light.
Screened Porch Conversions
Turn an existing screened porch into a more usable enclosed room by replacing screens with windows and doors selected for the opening, climate, and way you want to use the space.
Three-Season Style Spaces
For homeowners who want protection from bugs, rain, and much of the outdoor weather without necessarily conditioning the room exactly like the interior of the house.
All-Season Style Enclosures
With the right windows, doors, insulation, and climate-control strategy, an existing covered space can feel much more like an extension of the home and stay comfortable through more of the year.
Not sure what to call the room you have in mind? That’s okay. Show us the existing space and tell us how you want to use it. We’ll help determine what enclosure approach makes sense.
BUILT AROUND HOW YOU WANT TO LIVE
Windows, Doors & Design Choices for Your Patio Enclosure
A good enclosure shouldn’t look like windows were simply added wherever they fit. Our woner, Andy, designs the window and door layout around your existing structure, views, furniture placement, ventilation, traffic flow, and how you actually plan to use the room.
Choose the Right Windows
Mix operable windows for ventilation with larger picture windows where an uninterrupted view matters more. We offer the same range of window styles and performance options available for the rest of your home, including impact and non-impact choices where appropriate.
Plan the Door Around the Room
Sliding glass doors and hinged exterior doors can connect the enclosure to the yard, deck, or rest of the home. Door placement and operation matter, so we think through walking paths, furniture, usable wall space, and how the room connects to the outdoors before anything is ordered.
Make It Look Like It Belongs
Window proportions, frame colors, grids, glass, hardware, trim, and configurations can all be selected to complement the existing house. The goal is an enclosure that feels intentional, not like an afterthought.
WHY COASTAL SHIELD
Your Patio Enclosure Is a Window & Door Project. That’s Our Specialty.
A beautiful enclosure depends on much more than filling openings with glass. The windows and doors need to work together, perform in Charleston’s coastal climate, fit the existing structure correctly, and make sense for the way the finished room will be used.
That’s where 15 years of specializing in windows and doors matters. Andy personally evaluates the space, helps design the configuration, measures the openings, orders the products, and stays involved through installation. There’s no salesperson handing your project to another department after the contract is signed.
✓ Owner-led design
Practical guidance on layout, views, ventilation and traffic flow.
✓ Premium materials
Products selected for long-term performance in our coastal environment.
✓ No commissioned sales team
Straightforward recommendations without the high-pressure sales process.
✓ One point of contact
The person who discusses the project with you is the person overseeing the details.
Andy Yagecic • Owner, Coastal Shield Window
START WITH THE SPACE YOU ALREADY HAVE
Can My Existing Porch or Patio Be Enclosed?
Often, yes. If you already have a covered porch or patio, we can evaluate whether the existing structure is a good candidate for an enclosure and what would be required to turn it into a more usable space.
Every project starts with the structure that’s already there. Roof coverage, existing framing, opening sizes, condition, drainage, storm-protection requirements, and how the room connects to the house all affect the design.
✓ Existing roof & structure
We look at what is already built and whether it can support the enclosure plan.
✓ Window & door layout
Opening sizes, views, ventilation, and traffic flow all shape the final configuration.
✓ Existing damage
Rotten or deteriorated material within our scope can be addressed before the new enclosure components are installed.
✓ Permitting & protection
Applicable permitting and coastal protection requirements are considered as part of the project.
Not sure whether your porch is a good candidate? You don’t need to figure that out yourself. That’s exactly what the consultation is for.
WHAT TO EXPECT
From Covered Patio to Finished Enclosure
Patio enclosures involve more design decisions than a simple window replacement, but the process shouldn’t feel complicated. Andy stays involved from the first look at the space through the finished project.
01
Evaluate the Space
We look at the existing covered structure, openings, condition, access, and how the enclosure will connect with the rest of your home.
02
Design the Enclosure
Together, we’ll work through window styles, door placement, impact protection, views, ventilation, privacy, trim, and the way you want to use the finished room.
03
Order & Prepare
We order the custom windows and doors and handle applicable permitting and project preparation before installation begins.
04
Build & Finish
Our crew installs the enclosure components, completes the work within our scope, and finishes the room with Andy overseeing the details through final walkthrough.
How Long Does a Patio Enclosure Take?
Because every existing structure and enclosure design is different, timelines vary based on measurements, product lead times, permitting, the condition of the existing space, and the complexity of the project. We’ll give you a realistic timeline once Andy has evaluated your patio or porch and the design is finalized.
UNDERSTANDING YOUR INVESTMENT
What Does a Patio Enclosure Cost?
There isn’t a useful one-size-fits-all price for enclosing a patio or porch. We’re working with an existing structure, so the size and condition of that space, the amount of glass, window and door choices, storm-protection requirements, and the work needed to create a finished enclosure all affect the quote.
Size & Openings
The size of the existing porch and the number and dimensions of openings determine how many windows, doors, and other materials are needed.
Window & Door Choices
Picture versus operable windows, sliding or hinged doors, glass, hardware, configurations, and other design choices can change the overall investment.
Impact Protection
Where impact protection is required or preferred, impact-rated windows and doors will cost more than comparable non-impact products.
Existing Conditions
Framing, rot, trim, siding, and other conditions we uncover or need to modify can affect the scope of the enclosure.
The best place to start? Let us see the space.
We’ll talk through what you want from the room, evaluate what you already have, and recommend an enclosure that makes sense for your home and budget. No high-pressure sales pitch.
LOCAL HOMES. LOCAL EXPERIENCE.
Built for Homes in Mount Pleasant & the Charleston Lowcountry
Coastal Shield Window is based in Mount Pleasant and works throughout the Charleston area. We’ve completed window, door, and enclosure projects in communities including Belle Hall, Park West, Rivertowne, Brickyard, Charleston National, I’On, Shem Creek, Wild Dunes, and beyond.
A Local Company You’ll Still Be Able to Call After the Job Is Done
We’re a family-owned Mount Pleasant company, not a national franchise. When you call Coastal Shield, you’re dealing directly with the people responsible for your project.
That same accountability continues after installation. Our warranty covers manufacturing defects as well as water leaks or necessary adjustments related to windows and doors we’ve installed for the original homeowner, subject to the terms of our warranty.
More than 50 five-star Google reviews from Charleston-area homeowners and growing.
What Charleston Homeowners Are Saying
COMMON QUESTIONS
Patio Enclosure Questions, Answered
Can you enclose my existing covered patio or porch?
Often, yes. Coastal Shield specializes in converting existing covered patios and porches into enclosed spaces using windows and exterior doors. Andy will evaluate the existing roof, framing, openings, condition, and how the space connects to your home before recommending a design.
Do you build sunroom additions from the ground up?
No. We do not build new sunroom additions, foundations, or roof structures from scratch. Our patio enclosure work starts with an existing covered patio or porch and transforms that structure into a more comfortable enclosed room.
How much does it cost to enclose a patio in Charleston or Mount Pleasant?
Patio enclosure pricing varies based on the size and condition of the existing structure, the number and type of windows and doors, impact requirements, trim and repair work, and the overall design. Because every covered patio is different, the best way to get an accurate number is an in-home consultation after Andy has evaluated the space.
What’s the difference between a screened porch, three-season room, and four-season room?
A screened porch primarily protects against bugs while remaining open to outdoor temperatures and humidity. A three-season style enclosure typically adds windows and doors for more weather protection and comfort. A four-season style space uses higher-performance windows, doors, insulation, and climate control so the room can function more like the interior of the home for more of the year.
Can a screened porch be converted into a sunroom-style space?
In many cases, yes, provided the existing covered structure is suitable for conversion. We can replace screened openings with windows and exterior doors to create a brighter, more protected room that feels much more connected to the rest of the home.
Do patio enclosures need impact windows and doors?
That depends on the property’s location, applicable building requirements, and how the openings will be protected during a storm. We offer both impact and non-impact options and will explain what applies to your home during the design process.
Do you handle permits for patio enclosures?
When permits are required for the enclosure work within our scope, Coastal Shield handles the applicable permitting process. Requirements can vary by municipality, neighborhood, and project, so we determine what is needed after evaluating the existing space and proposed design.
How long does a patio enclosure project take?
Timelines vary because every enclosure starts with a different existing structure. Product lead times, permitting, repair work, window and door selections, and project complexity all affect the schedule. After the space is evaluated and the design is finalized, we’ll give you a realistic estimate for your project.
What windows and doors can I use in a patio enclosure?
We can design the enclosure with a mix of operable and picture windows, along with sliding or hinged exterior doors. Impact and non-impact options, glass packages, frame colors, grids, hardware, and configurations can all be selected based on the home, budget, views, ventilation, and intended use of the room.
MAKE MORE OF THE HOME YOU ALREADY HAVE
Ready to Turn Your Covered Patio Into a Space You’ll Actually Use?
You don’t need to know what window style, door configuration, or enclosure type you want before calling. Show us the space and tell us how you want to use it. Andy will help you figure out what makes sense for your home.
Local. Family-owned. Owner-led from consultation through installation.
Serving Mount Pleasant, Charleston, and surrounding Lowcountry communities.
