BOOK TODAY
to Unlock Late Season Savings!
Upgrade Your Home with Trusted Exterior Solutions in Northwestern Indiana & Chicagoland
Transforming Homes in Northwestern Indiana Since 1950
For more than 75 years, Trim-A-Seal has provided reliable home improvements to homeowners across Northwestern Indiana and South Chicagoland. As a third-generation, family-run business, our reputation has been built on trust, craftsmanship, and our commitment to lasting relationships.
Our approach is focused on honest communication, organized project management, and treating every home as if it were our own. These core values guide everything we do, helping every family we serve receive solutions that last and support that extends well beyond installation.
From Lake County to Porter County, South Bend, and the surrounding communities, we remain dedicated to creating safe, comfortable, and attractive homes.
Complete Home Exterior Solutions
Trim-A-Seal brings a full suite of home exterior solutions to the region. Every service is designed to address common homeowner challenges, such as energy loss, aging exteriors, leaks, and unprotected surfaces.
Explore our core services below, each offering long-term value and protection.
Modernize your home and reduce drafts with expertly installed options, including Sunrise windows.
Financing Available
Seal the Deal
Why Homeowners Choose Trim-A-Seal
Homeowners throughout Northwestern Indiana trust Trim-A-Seal for a better remodeling experience from first call to final results. Our customers value clear communication, timely project updates, and respect for their property.
Projects are always completed by trained installation crews who use premium products. Our partnerships with brands like Sunrise, CertainTeed, PlyGem, and Fortress Floors mean you’ll receive durable, dependable results.
The Trim-A-Seal promise includes on-time arrivals, a no-mess work environment, and ongoing support after your project is finished. Your satisfaction comes first, every time.
Our Leading Products & Trusted Brands
We use leading products that bring long-term value. Trim-A-Seal selects trusted manufacturers for every project, including:
Sunsetter for motorized awnings and shade solutions
Fortress Floors for high-performance polyurea garage floor coatings
Sunrise and Lang for energy-efficient window replacements
PlyGem and CertainTeed for protective, low-maintenance siding
Albany and HomeGuard for industry-leading doors
All garage and basement floor coatings use polyurea, providing a tougher and longer-lasting surface compared to traditional epoxy coatings.
Our Proven Home Upgrade Process
Upgrading your home with Trim-A-Seal is straightforward. Every project follows a proven, step-by-step process:
Personalized Consultation & Needs Assessment: We listen to your goals, evaluate your space, and gather the necessary details to plan the project.
Clear Plan & Upfront Pricing: You get transparent pricing with no surprises, plus expert service recommendations aligned with your goals.
Professional Installation: Skilled installers complete the work with care and respect for your property.
Final Walkthrough & Ongoing Support: We review the finished project with you, answer questions, and provide support long after completion.
Our team takes care of every detail so you can relax and look forward to long-term results throughout your home. Find out more about why homeowners choose Trim-A-Seal on our customer testimonials page.
Serving Northwestern Indiana & Beyond
Trim-A-Seal is proud to serve homeowners in Gary, Hammond, Schererville, Crown Point, Valparaiso, Chesterton, Portage, Roseland, and throughout South Shore, Hyde Park, and Gage Park. Our service area covers all of Northwestern Indiana, with expanded awning and shade options across Northern Indiana, Eastern Illinois, and Western Michigan.
For a complete list of local communities, please visit our areas served page.
Trim-A-Seal’s Commitment to the Community
Giving back is part of who we are. Our team proudly partners with the ICAN charity to support important causes and families right here in our region. Our commitment extends into the neighborhoods we serve, and we are honored by local recognition and awards reflecting this dedication.
Learn more about our support for the community through our ICAN Charity partnership.
Ready to Improve Your Home?
Start your project with a free estimate or schedule a personal consultation with a home improvement specialist. Discover exterior upgrades that protect, update, and add value to your home.
For more detailed information and inspiration, you can download our brochure or request a personal appointment to discuss your goals. Experience the difference that Trim-A-Seal brings to every project.
Featured Customer Review
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
Learn More About Our Products
Looking for Quick & Easy-to-Digest Information?
Make Sure to Download Our Brochure
The Seal Of Approval
We Show Up on Time
We Respect Your Home
We Back Up Our Warranties
An Unmatched Commitment to Customer Care
Our technicians are more than just installers. They’re seasoned experts who treat every project with the precision and care it deserves. With our team on your side, you can feel confident your job will run smoothly from start to finish.
We don’t compromise on quality. Trim-A-Seal uses only premium materials from trusted brands. And, with our industry-leading warranties, you can trust that your investment is protected, giving you peace of mind for years to come.
At Trim-A-Seal, we're not just about improving homes. We're about improving lives. Through our partnership with the Indiana Canine Assistant Network (ICAN) we support the training of service dogs that provide essential support to individuals with disabilities.
We believe home improvement should be affordable for everyone. That's why Trim-A-Seal offers exclusive discounts on our Seal the Deal page, so you can get top-tier products and installations without the premium price.
Our History: Serving Our Local Community Since 1950
For over 75 years, Trim-A-Seal has been more than just a home improvement company. We’ve been a part of the fabric of Northwest Indiana, Chicagoland, and Western Michigan, earning the trust of homeowners one project at a time.
Over the decades, we’ve built a reputation for exceptional service, not just through the quality of our work, but by staying true to our roots as a third-generation, family-owned business.
From the beginning, our mission has been clear: provide superior home improvement services at affordable prices. This commitment to excellence has helped us grow, but it’s our dedication to the community that’s made us a local favorite.
We pride ourselves on delivering outstanding products from industry-leading manufacturers and taking the time to guide our customers through every decision. Whether it’s gutters, windows, or siding, we’re here to help homeowners make informed choices that best suit their needs.
Our long-standing success is a testament to the relationships we’ve built and the service we’ve provided. We are proud of the legacy we’ve created and we are excited to continue serving the people of Gary, IN, and beyond for many years to come.
Check Out Our Exceptional Work
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
