Authorized Sunspace Dealer
Walls-Under & Porch Conversions for Maryland Homes
Expand the functionality of your under-porch, deck, or existing structure quickly, easily, and with style. Sunspace WeatherMaster window and wall systems are custom made and delivered assembled to fit.
About the System
Turn your porch, under-porch, or deck into a sheltered personal sanctuary.
Our Sunspace walls-under and porch conversion systems are custom made and delivered assembled to fit. Choose WeatherMaster™, WeatherMaster Plus™ bi-fold walls, or full glass window systems to combine stylish, state-of-the-art design with custom-fitted panels.
As an authorized Sunspace dealer, Custom Design & Build installs the complete WeatherMaster lineup with ViewFlex vinyl, blinds, illuminated valances, and a full range of screen options.
- Transform your porch, under-porch, or deck
- Create a stylish, flexible, and functional living area
- Transformable shelter options for every season
- No additional charge for customizations
- Custom-fabricated fit for fast, clean installation
Available Systems
Four WeatherMaster systems, one custom result.
Most homeowners assume there is a single window option. There are four. We help you choose the right mix of windows, doors, and walls for how you want to use the space.
WeatherMaster Vertical 4-Track Windows
Our most popular system. ViewFlex vinyl panels slide up, stack down, or bunch in the middle for up to 75% ventilation, then close tight against wind, rain, and pollen. Infinitely adjustable and custom built to fit your opening.
WeatherMaster Horizontal 2 & 4-Track Windows
Windows that slide left or right instead of up and down. The 2-track opens 50% and the 4-track opens up to 75%. A great fit for porches, screen enclosures, and gazebos with wider openings.
WeatherMaster Vertical 4-Track Entry Doors
A custom entry door that matches your windows exactly, with the same ViewFlex panels built right in. Fully assembled with stainless steel hinges and a pre-installed threshold for a leak-proof, sag-free fit.
WeatherMaster Plus Bi-Fold Door System
A European aluminum bi-fold system that folds an entire wall open to the outdoors, then closes for shelter. Slim sightlines, a thermal break for efficiency, and your choice of single-glazed tempered or Low-E argon insulating glass.
Features & Advantages
Designed for comfort, built to last.
Why Maryland homeowners choose the Sunspace WeatherMaster system for their porch and walls-under conversions.
Enhanced Usability
Transform unused spaces like porches, under-porches, or decks into functional, stylish living areas you actually use year-round.
Custom Fit Design
Each WeatherMaster system is custom-fabricated to fit your opening perfectly, ensuring a seamless, professional look on every project.
Flexible Shelter Options
Choose WeatherMaster™, WeatherMaster Plus™ bi-fold walls, or full glass window systems for the right level of protection and style.
Easy Installation
Panels are delivered pre-assembled to fit, reducing the need for specialty trades and making installation quick and straightforward.
Personalized Customization
Tailored solutions designed to meet your unique opening, layout, and lifestyle, with no additional charge for customizations.
ViewFlex Vinyl Panels
Durable ViewFlex vinyl is stronger than glass, virtually maintenance-free, lightweight, and proven for over 40 years.
UV & Element Protection
Shields your space from sun, rain, wind, and insects while improving thermal performance compared to single-pane glass.
Colors & Tints
Five aluminum frame colors (White, Black, Driftwood, Bronze, Grey) and four vinyl tints (Clear, Smoke Gray, Dark Gray, Bronze).
Options & Upgrades
Customize your conversion, your way.
Bi-fold walls, blinds, valance lighting, and a full range of screens let you fine-tune your porch conversion for how you actually live.
Custom Window Blinds
Custom-fitted blinds block harmful UV and unwanted glare, perfect for TV rooms, offices, or any sun-exposed space.
Illuminated Valances
Built-in valance lighting adds warm ambient light to your porch conversion for evening entertaining and year-round use.
Screen Options
Pick from Better Vue, 18×14, No-See-Ums, Tuff Screen, Solar Insect Screen, and Pool & Patio screening to match your needs.
Recent Project
A Maryland porch, transformed into a year-round room.
A five-bay Sunspace WeatherMaster enclosure with ViewFlex sliding panels and a hinged entry door, installed by our team under an existing covered porch.
How It Works
From first call to finished porch conversion.
Free Consultation
We walk your porch, deck, or under-porch area, measure each opening, and talk through how you want to use the converted space.
Design & Color Selection
We help you choose between WeatherMaster, WeatherMaster Plus, or full glass, then select frame color, vinyl tint, and screen type.
Custom Fabrication
Your panels are custom-built by Sunspace and delivered pre-assembled to fit your exact opening, with no field guesswork.
Quick, Clean Install
Our trained crew installs the system without disruptive trades, and you start enjoying your new porch conversion right away.
Investment Guide
What does a porch conversion typically cost?
Typical ranges for porch enclosures from 12' x 12' to 16' x 20'.
WeatherMaster 4-track
$22,000 to $55,000
Final price in your written proposal.
WeatherMaster Plus bi-fold
$28,000 to $62,000
Final price in your written proposal.
Full glass
$32,000 to $68,000
Final price in your written proposal.
Integrated railings add $2,500 to $5,000.
FAQ
Common questions about walls-under & porch conversions.
What is a walls-under or porch conversion system?
Are you an authorized Sunspace dealer?
What is the difference between WeatherMaster and WeatherMaster Plus?
What is ViewFlex vinyl?
What colors and finishes are available?
Will it work for the space under my deck?
How long does installation take?
Is there a warranty?
Learning Center
Walls-Under and Porch Conversion guides
Sunrooms
Converting a Screened Porch to a Sunroom in Maryland: Options and Cost
How to turn a screened or covered porch into a sunroom with a walls-under system, what it costs, and what your existing porch needs to be ready.
Sunrooms
Can My Deck Support a Sunroom? What Maryland Homeowners Should Check
Why an enclosed room loads a deck differently, what a contractor checks before building on one, and your options if the deck is not strong enough.
Sunrooms
Sunroom Windows: Vinyl vs Glass, and Which Is Right for You
WeatherMaster vinyl windows compared with single glass and Low-E insulated glass: ventilation, clarity, seasons, care, and cost.
Sunrooms
How Much Does a Sunroom Cost in Maryland? 2026 Prices by Type and Size
What a sunroom costs in Maryland in 2026, by type, Sunspace model, and size: three-season, four-season, screen rooms, porch enclosures, and patio covers.
Ready to convert your porch or under-deck space?
Book a free in-home consultation with Maryland's authorized Sunspace dealer. We'll measure, design, and quote your WeatherMaster system, with no pressure.