Four-Season Sunroom Additions

Zephyr Thomas builds the most magnificent four season and three season sunrooms Lancaster, PA has to offer! Live the dream in your own four season or three season room addition. A sunroom addition elegantly expands your living space and allows you to embrace the comfortable manner of living you have always imagined. We will help design the addition you envision for your home. Everything can be customized to your liking, from the roof line to the color and style of siding to the kind of windows and more will be chosen to match the characteristics of your home.

The term “stick built” refers to the construction of the sunroom itself. Stick built rooms are comprised of traditional construction materials, such as lumber, roof rafters, vinyl siding, and insulation and are framed similarly to how a house is framed. A stick built sunroom can be a three season or four season room.

Our three season stick built sunrooms most often include Eze-Breeze vertical 4-track windows and cabana doors. These are a great option if you are looking for some protection from bugs and the elements but don’t need or want a year round sunroom. Vertical 4-track sunrooms offer an option between a screened in porch and a four season sunroom.

Our stick built four season sunrooms most often include vinyl sliding windows and patio doors. Other options can also include double hung vinyl windows, casement windows, picture windows and steel or fiberglass entry doors. These windows and doors have insulated glass packages and are designed to be energy efficient. These sunrooms usually include a PTAC heat/AC unit to allow for the room to be heated and cooled separately from the main house.

Zephyr Thomas builds the most magnificent three & four season sunrooms in Pennsylvania! Now, you can live the dream in your own three or four season sunroom addition customized to your exact standards. A gracious, unhurried lifestyle is waiting for you. Before your eyes, your living space expands to embrace the comfortable manner of living you have always imagined. Your personal vacation spot, your home away from home, to relax and get away from the busy responsibilities of your day. Not all home improvement companies will give you the same quality of workmanship Central Pennsylvania has come to expect from Zephyr Thomas over the past 60 years. So, when you’re considering a sunroom addition, call Zephyr Thomas and get peace of mind that your job will be done right.

Why Zephyr Thomas?
Quick Installation

Zephyr Thomas’s sunroom windows & doors have a unique contoured exterior design to enhance the classic elegance of any home. Windows & doors are fully fusion welded at all corners for maximized strength, prevention of drafts, and protection against water leakage.
Four-season rooms use the highest quality windows available, constructed with energy-efficient, triple weather-stripping, heavy-duty window locks & vent latches for added security for children and pets. Triple interlocks at the meeting rail, header, and sill provide unsurpassed protection against forced entry and a strong tight seal.
Optional High-Efficiency Heat Pump Air Conditioning Units – Provide increased year-round comfort.
Optional Glass Kneewalls & Trapezoids – Enjoy a maximized viewing area of your property & the outdoors.
TemperHigh-Performance Glass Package with Warm Edge Spacer Technology – Protects & provides a thermally efficient barrier from elements for energy-efficient living.
All sunroom windows are tested to NFRC standards & are Energy Star-qualified in all 50 states.

Zephyr Thomas can install a new concrete pad, stamped concrete pad, or deck as the support foundation for your new sunroom.
Zephyr Thomas handles any excavation of your room.
Zephyr Thomas is careful and respectful of your home during our installation process. When we leave your home you will barely know we were doing construction!
Our installers are fully-trained sunroom contractors in Lancaster, PA who pay close attention to detail on your project.
Unlike competitors, Zephyr Thomas will handle your project from A-Z. You don’t have to worry about different aspects of your project being subcontracted out to several companies.
You can rest assured that when you sign a contract with Zephyr Thomas, we have all of the necessities to construct your room in its entirety covered. There are no hidden fees. No upcharges after you sign a contract. No selling gimmicks that leave out half of your project’s completion requirements.
We work one one-on-one with our customers to ensure they are completely satisfied with their home improvement project!

Before And After

Click to Use the Before & After Slider

Inspiration Gallery

Testimonials About Four-Season Sunroom Additions

I would recommend Zephyr Thomas for all your building and remodeling needs. We used them several years ago for window replacements at our house and office and have been exceedingly happy with the job they did. When we decided to replace our deck and sun room, they were the first place we called and we went with them immediately. They were very courteous and conscientious, did a wonderful job, and gave five-star customer service. Plus they brought the job in on time with a tight deadline.

- Margaret Kay

Dear Matt, What a lovely surprise- your gift card for the Longhorn! That was so very kind of you and that wonderful company you represent. The Bylers come to visit our sunroom often even bringing their out of state friends for a show and tell of the great porch heading their way later this year! They are so excited! Joy and Ron, across the street from us, also can't stop talking about how much they love their new porch/ sunroom. The Zephyr name in this neighborhood surely is well represented with the highest regard and we are most thankful we got to know you and your company! Thank you again for your thoughtfulness! Stop in for a visit any time you're in the neighborhood!

- Carol & Fred Griffiths