Locally Owned and Operated

Here at Triangle Exteriors we have been serving our customers now for over 30 years. Giving each customer our personal attention from start to finish when we install our products. We are a licensed, fully insured and accredited business and stand behind every job we do with a lifetime warranty on all materials, labor, and professional installation of all your windows and doors. Replacement Doors and Windows in Lansing and surrounding areas.

Customer Satisfaction 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.

Finding the perfect window and door for you is as simple as answering a few questions and browsing our robust catalog of styles so we can give you a fast and easy quote today! We also have other viewable brochures we can send you for an easy, no hassle look at our line of superior products. Including Alside, Simonton, Pella, Andersen, MW, Silverline, Provia, Therma Tru and many more!

We Offer Lifetime Warranty On All Labor & Materials

Get Your Free In Home Estimate Today (517) 285-2583

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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

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 |

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.