Exterior Door Installation & Replacement in Northwestern Indiana & Chicagoland
BOOK TODAY
to Unlock Late Season Savings!
Elevate Your Home’s Security and Curb Appeal with New Doors
Outdated exterior doors often contribute to drafts, energy loss, and decreased security. Upgrading to modern entry, patio, storm, or security doors not only solves these common issues but also updates your home’s appearance and overall value.
Trim-A-Seal has earned the trust of Lake County, Porter County, and South Chicagoland homeowners with 70 years of third-generation local craftsmanship delivering reliable entry solutions.
Wide Selection of Durable Exterior Doors
The proper exterior door installation brings both function and style to your home. Choose from Trim-A-Seal’s complete line of replacement doors, each designed for performance and appearance:
Entry Doors: Showcase your style with customizable colors, decorative glass, and sidelights. Options include steel, fiberglass, or woodgrain designs. These are sourced from industry leaders like Albany Door Company for unmatched durability.
Security Doors: Get reinforced frames, premium safety glass, and advanced multipoint locking hardware to secure your home. Trim-A-Seal installs Home Guard security doors, known for proven protection.
Storm Doors: Protect your entry while enjoying better airflow and natural light. Features include impact-resistant glass, advanced weatherstripping, and multiple screen and visibility options. Home Guard storm doors are engineered for Indiana weather and daily use.
Sliding Patio & French Doors: Maximize daylight and backyard access with low-maintenance, energy-saving patio doors. Sunrise offers easy-glide sliding doors and elegant French doors in a wide variety of finishes and energy-efficient packages, including options with impact glass for added safety.
By partnering with top manufacturers such as Home Guard, Albany, and Sunrise, Trim-A-Seal delivers a premium selection of durable, energy-efficient doors that meet every need.
Featured Customer Review
Bruce was very personable and professional. He educated me on the product options, enhancements and construction quality of Trim-A-Seal door products. Bruce will insure you get quality and satisfaction with exactly what you want to purchase. Thanks, I will return when it's time to get my windows.
Learn More About Our Products
Looking for Quick & Easy-to-Digest Information?
Make Sure to Download Our Brochure
Benefits of Upgrading to Modern Doors
Energy Efficiency
Better insulation and premium weatherstripping help reduce heating and cooling costs.
Home Security
High-strength frames, multi-point locks, and toughened glass options defend against break-ins and weather.
Weather Resistance
Durable finish options and sturdy construction stand up to Northwest Indiana’s changing climate.
Long-Term Durability
Modern materials resist warping and fading and require less maintenance than older doors.
Curb Appeal & Value
Fresh door styles give your home a welcoming look and can increase property value.
Take a look at our gallery of door projects for inspiration on how a new entry, storm, or patio door can improve the look of your home.
What Sets Trim-A-Seal Apart
Trim-A-Seal brings more than seven decades of experience to every project. Our door installers are trained professionals, committed to respect, communication, and professionalism. From your first consultation to final walkthrough, you can expect consistent updates and answers to your questions.
Every exterior door installation and replacement includes comprehensive warranty protection on both the product and workmanship, providing you with confidence today and in the future. In addition, customers benefit from our specials and discounts for extra value on their investment.
The Door Installation Process
The Trim-A-Seal process is designed for clarity:
Consultation & Selection: A Trim-A-Seal door specialist visits your home to discuss needs, show samples, and recommend products. You will explore different styles, colors, and hardware that fit your vision and budget.
Precise Measuring: Our team will take accurate measurements for a perfect fit, which is essential for both performance and appearance.
Removal, Preparation, & Installation: We’ll remove the old door, prep the opening, and protect your property. Our experienced teams handle every detail of installation and keep the worksite tidy.
Final Walkthrough, Clean-Up, & Warranties: Our team will review your new doors with you, answer any remaining questions, and leave the area spotless. Robust product and labor warranties cover all aspects of the installation.
Service Areas in Northwestern Indiana & Chicagoland
Trim-A-Seal provides exterior door installation services throughout Northwest Indiana and South Chicagoland. Primary areas include Gary, Merrillville, Munster, Schererville, Valparaiso, South Bend, and nearby South Chicago suburbs.
For a complete list of locations, please visit our areas served page.
Frequently Asked Questions About Door Installation
Ready for a Trim-A-Seal Door Upgrade?
Take the next step toward better security, savings, and curb appeal. Ask about limited-time Seal the Deal Discounts for your door installation.
Schedule a free consultation with Trim-A-Seal’s exterior door experts to discuss entry, patio, storm, or security doors designed for Northwest Indiana homes. Discover the ease of professional exterior door installation and unlock savings on your next project.
Financing Available
Seal the Deal
Inspiration for Your Next Home Remodel
Check Out Our Exceptional Work
Transform Your Residence into the Dream Home You’ve Always Wanted
Trim-A-Seal is a reliable partner you can trust to treat you and your home with respect. Our unparalleled experience in the home improvement industry has made us the leading source for homeowners in need of affordable, durable, and beautiful upgrades.
Outstanding Reviews
The installers that came to the house were very personable and cleaned everything up, installation was quick and we are enjoying our sunsetter so much. Thanks for the great service. We are telling everyone about Trim-A-Seal!!!!
The technician was very professional and completed the work in a timely manner. The craftsmen was excellent and we would recommend your organization to our friends.
I am completely satisfied with Trim-A-Seal installers. They did a great job installing my SunSetter motorized awning. They explained and showed me how it worked and answered all of my questions. I definitely would recommend them.
Just finished our exterior project. New siding, windows, gutters, soffit, and front door. it's literally like having a brand new house! We love the finished product and love the professionalism from everyone involved. You've gained lifelong customers
We are thrilled & more than satisfied with how our garage floor turned out. Pat was our salesman and presented the product and installation process professionally and without pressure. Tom and Jerome were our installation team and were professional, conscientious, thorough and were very hard working. Based on our experience we would not hesitate to recommend Trim-A-Seal.
Mike was our salesman and he was great to work with , no hard sell , no bad mouthing his competitors, unlike the other company that came out. The installers were extremely friendly , explained everything they were doing and cleaned up after they were done. Highly recommend.
We love our Sunsetter awning! From the time we met with the friendly and helpful salesperson from Trim-A-Seal to the efficient and talented installation crew everyone was courteous and professional. We face west with the sun reflecting off the lake so an awning was a must. We are very happy with our choice of product as well as Trim-A-Seal.
We give Adam and Richard a A+, great job enjoyed them being here on time ,friendly , explied well, couldn't ask for more!
We struggled to find a gutter guard capable to protect our new home surrounded by trees. Gutter Helmet is the CLEAR right choice. Trim A Seal handled the installation professionally and on time. We got what we were promised!!
Our Installers, Holland and Darrell, both did an exceptional job of installing our new awning. They explained the operation of the unit thoroughly. Top notch team!
I had maintenance done on my gutters and I was pleased with the work. Would use this company again.
This morning trimASeal came out to start on my siding, met with Adam and Richard, we did the walk around, Adam explained everything so I understood it, and he is very easy to talk with and very knowledgeable, will post after the job is done to.
I am completely satisfied with Trim-A-Seal installers. They did a great job installing my SunSetter motorized awning. They explained and showed me how it worked and answered all of my questions. I definitely would recommend them.
Bruce was very personable and professional. He educated me on the product options, enhancements and construction quality of Trim-A-Seal door products. Bruce will insure you get quality and satisfaction with exactly what you want to purchase. Thanks, I will return when it's time to get my windows.
They took care of some unexpected problems for my grandfather and did what they could to make things work. Adam and Richard did a wonderful job.
Our Location
