Free Estimates Call Today (517) 285-2583
Triangle Exteriors BBB Business Review
We Offer Replacement Doors, Windows & More!

Home Doors & Window

Lifetime Warranty On Materials & Labor

Proudly Serving Greater
Lansing Area

Over 30 Years Of Experience

Your Satisfaction Guaranteed

The Owner, Robert, Is On Each Job Site

Top Rated Lansing Exterior Doors, Replacement Window and Siding Company

Serving The Greater Lansing, MI and Surrounding Areas

We are a licensed, fully insured, accredited business and stand behind every job we do with a lifetime warranty on all materials, labor, and professional installation of all your windows, doors, siding, roofing, decks and more!

Certified Therma Tru Contractor

Exterior Door Replacement Services

Customize your home with a Therma Tru entryway with a wide selection of door styles, door glass, paint or satin finish, hardware and accessories to increase the curb appeal of your home. Fast, free in home quotes are guaranteed to help you find the perfect door and our lifetime warranty gives you peace of mind that you have made the right choice for years to come.

  • Front & Entry Doors
  • Patio Doors
  • French Doors
  • French Rail Doors
  • Storm Doors
  • Wood, Steel & Fiberglass Doors

Window Replacement Services

Energy-smart and weathertight windows reduce fuel consumption needed to heat and cool your home but they are also the perfect opportunity to transform your personal space into one that reflects your specific style and taste. Call today for your free in home estimate (517) 285-2583.

  • Double Hung Windows
  • Bay & Bow Windows
  • Casement Windows
  • Awning Windows
  • Sliding Windows
  • Garden Windows
  • Custom Windows
  • Glass, Vinyl, Hurricane Glass Windows

Why Choose Triangle Exteriors

  • A+ BBB Rating
  • Licensed & Insured
  • Locally Owned & Operated
  • Satisfaction Guaranteed
  • Owner Is On All Job Sites
  • Lifetime Warranty On Labor & Materials

Your Satisfaction Is Guaranteed

At no point will you have to deal with salesmen, subcontractors, or separate distributors. We give fast, free in home quote for a demonstration or over the phone estimate with a few easy questions and cut out the middleman. We are here to guarantee your happiness with our quality craftsmanship and warrantied work, with a peace of mind you will have for years knowing you made the right choice.

What Our Clients Are Saying

“When Robert told me he could replace my door when the big box stores said it wasn’t possible, I was skeptical. But after the job was done, it looked like it was part of the factory door unit. He exceeded my expectations and all the while providing great service and friendly attitude. There were no surprises and no extra fees. Everything he said he would do he did and more. Highly recommended for any entry door needs.”

- Joe N | Replace Exterior Door |

“Robert work with me through this whole project. I’m out of state so I couldn’t be there. But he inform me everything he did then took pictures of the finish project. Price was lower than I expected. He replace the whole front door and 3 windows. What a great job!”

- Michele J | Replacement Windows |

“Robert was very professional and understanding of our wants from the very beginning. He showed up on time and finished in a timely manner. I would definitely hire him again.”

- Daniel W | Replace Sliding Doors |