Window Sales and Installations

Windows let in light, air, and life to your home. At Les Grumdahl Window & Siding, we know how hard it is to find the right windows at the right price. That's why we carry the best brands, and we offer certified and licensed installation. We want to be the company you trust for new and replacement windows!

We work with residential and commercial customers, and our window selections are truly impressive. Plus, we're a company you can trust. We've been a local, family-owned business in Duluth, MN since 1947, and we're members of the Arrowhead Builders Association. Many of our products are backed with a limited lifetime warranty.

Visit us today in our showroom! Special discounts are available. We reply to inquiries as soon as possible, and free estimates are available!

Exquisite Windows With Infinity From Marvin

When you have to replace your windows, it's a delicate balance between form and function. Obviously, you want your windows to look good, but you always want windows that are going to last so you don't have to replace them again. Fortunately, you can get the best of both worlds with Infinity from Marvin.

Marvin is a top brand for windows, and its Infinity line is perfect for replacement windows. Strength never looked so beautiful, and Marvin has created these windows to exceed your expectations. We're excited to have a good selection of Infinity windows for our customers to consider at Les Grumdahl Window & Siding.

According to Infinity President Dan Marvin, "We deliver on this promise by building Infinity windows and doors with Ultrex fiberglass so they outperform and outlast the competition to endure the test of time. We back your purchase with a limited lifetime warranty for ultimate peace of mind because we know you only want to replace your windows once."

Visit our showroom today to see examples of Infinity windows. The options are now available with bronze or black hardware. You can even pick your custom interior color. We offer custom prefinishing of the Everwood interior to match any interior finish. If you have questions, we'll be happy to answer them for you!

Benefits of Ultrex Fiberglass From Marvin

The power behind every Infinity window sold at Les Grumdahl Window & Siding is Ultrex fiberglass. Check out some of its unique benefits:

• Ultrex is a patented material pioneered by Marvin
• Ultrex is made with thin strands of strong glass cables, saturated with specially compounded resins, pulled through a heated die, capped with patented acrylic coating, and cut with diamond-edge blades
• Ultrex has a smooth finish that is resistant to dents and cracks so that it stays looking like new over time
• Ultrex's low thermal conductivity and superior performance combined with a selection of energy-efficient glazing options can help save money on your energy bills
• Ultrex is eight times stronger than vinyl
• Ultrex fiberglass is built to take the hits from everything like wind, hail, branches, and even a direct hit from a baseball

At Les Grumdahl Window & Siding, we strongly recommend Infinity windows with Ultrex fiberglass. The material you choose for your windows matters!

Quality With Great Lakes Windows and Doors by Ply Gem

Another brand we're proud to offer at Les Grumdahl Window & Siding is Great Lakes for windows and doors. Made by Ply Gem, this brand creates high-performance replacement and remodeling windows. The company has a rich history, and it has always embraced a forward-thinking mindset to create quality products customers love.

These aren't just standard windows. These premium windows and doors are crafted by hand out of the finest glass and vinyl, and they are custom-made for your home's exact specifications. The windows are designed with cutting-edge technology, which means you get windows with no parallel. You'll get a beautiful view and peace of mind.

With this kind of quality, the Great Lakes brand is somewhat exclusive. You'll only find it at well-known and respected dealers across the region. That's why we're so excited to carry this brand for our customers. Visit the showroom to see the options!