Fiberglass Windows Installed for Homeowners in Milwaukee, WI

Nowadays, with so many types of replacement windows available, why are fiberglass windows a consistently popular option? For homeowners, the reasons are abundantly clear—strength, durability, thermal performance, and cost efficiency. With a heat conductivity that is 800 times less than aluminum, fiberglass makes for one of the strongest frame materials. It can withstand the most severe weather conditions without warping, rotting, or rusting. Fiberglass also has a low thermal expansion, so it won’t expand and contract as much as other frame materials might, which prolongs the life of the windows and maximizes performance long term. So, where in Milwaukee, Wisconsin, can you find a great selection of well-made fiberglass windows? Simply look to Siding Unlimited. We’re siding … and a whole lot more! And we have the credentials to prove it.

Fiberglass Windows Milwaukee WI

As Milwaukee’s only Pella Platinum Certified Contractor, we install visually appealing fiberglass windows from this highly trusted company. They’re available in a range of styles to complement your home’s architectural design. Whether you go with a traditional double-hung, the easy-opening casement, or the convenient slider, you’ll have options that:

  • Are highly customizable with numerous choices in hardware, frame finishes, and grid patterns that allow you can design windows that perfectly reflect your taste
  • Optimize thermal efficiency with different levels of low-E glass to reduce heat transfer and potentially save you money on energy costs
  • Will be installed by our extensively trained and experienced technicians who will ensure that your windows operate smoothly from day one

For further confidence in your investment, we offer a five-year labor warranty on all of our window installations. Would you like to learn more about the fiberglass windows we install for Milwaukee residents? Contact Siding Unlimited. We would be more than happy to schedule a consultation with one of our knowledgeable representatives.

Contact Us
 The entire experience was outstanding and exceeded our expectations. Lou Davis provided thoughtful advice as we navigated selections on windows, siding, and front door. Crew cleaned up daily. Top notch from start to finish. 
 Hands down the best company we have ever done business with - professional, knowledgeable and very accommodating. We had new siding installed and other work. Wish we had come across this company years ago! Five stars aren't enough. 
 The team at Siding Unlimited is very professional, detail oriented, and extremely knowledgeable about their products and installation. 
 Our house looks wonderful and the guys were fantastic. 

Looking for ways to make your home improvement project more affordable? We offer a number of financing options for qualified customers.

Learn More
Company Info
Siding Unlimited LLC


665 Larry Ct.
Waukesha, WI 53186
Get Directions



2018 S Stoughton Rd
Madison, WI 53716
Get Directions



Now Open! Discover our new must-see Madison showroom. Now serving the entire Greater Madison area, located at 2018 S Stoughton Rd, Madison, WI. Open 9am-5pm Monday through Friday and 9am-12pm on Saturdays.