Do you offer free estimates and consultations?

Yes! The Window Source of Mason City provides free, no-obligation in-home estimates for replacement windows, entry doors, patio doors, and siding projects. A local representative visits your home to assess current conditions, discuss design preferences, and provide a customized quote—at no cost.

What types of windows and doors do you install?

We install a wide range of high-quality, energy-efficient products customized to fit your home and local climate. Offerings include: Windows: double-hung, casement, sliding, picture, bay, awning, and custom-sized windows. Doors: patio doors, sliding glass doors, and premium entry doors. Siding: durable siding installations that enhance both protection and curb appeal.

Are your products ENERGY STAR® rated and reliable?

Absolutely. We exclusively offer ENERGY STAR® rated products with NFRC-certified labels, ensuring real-world energy performance. All our windows and doors are backed by a Limited Lifetime Warranty covering frame, sash, glass, and labor—giving you long-term confidence and value.

What areas do you serve, and how experienced is your team?

Located in Mason City, Iowa, we proudly serve homeowners across North-Central Iowa—including Clear Lake, Garner, Algona, Forest City, and Charles City. The business is locally owned and operated, and our team brings years of industry experience, expert training, and award-winning service.

Do you offer financing and what warranties are included?

Yes—we offer flexible financing options to make it easier for homeowners to upgrade their windows, doors, or siding without delay. Every product comes with a Limited Lifetime Warranty, and our energy efficiency ratings are backed by certified testing and performance standards.

Blog

Bay Windows vs. Bow Windows: Which Is Right for Your Mason City Home?

A bay window angles out from your wall, while a bow window curves out in a gentle arc, and both bring extra light and space to a room. This guide...

Preparing Your Windows For Summer Heat And Humidity In Mason City

Preparing your windows for summer heat and humidity means checking your seals and clearing your drainage holes so hot, muggy air stays outside. Mason City summers get sticky fast. The...

Egress Window Installation in Mason City: Iowa Code & Cost

An egress window is a basement window big enough for a person to climb out during a fire, and Iowa code requires one in every basement bedroom. Most older Mason...

The Ultimate Guide Sealing & Flashing for Windows

Window flashing and sealing is done right when the layers go bottom to top and only three sides get sealed. That order lets water run back out instead of soaking...

Casement vs. Awning Windows: Which on best for your home

Casement windows hinge on the side and swing open like a door, while awning windows hinge at the top and open from the bottom so only awning windows stay open...

Awning Windows: A Complete Guide to Ventilation & Energy Efficiency

Awning windows hinge at the top and open outward from the bottom, letting air in while keeping rain out making them one of the most practical window styles for Iowa...

Window and Door Installation for New Homes: What to Expect

In a new build, the crew fits windows and doors into rough openings after framing and before drywall, then locks them in with nail fins and flashing tape. Putting up...

How to Find the Right Contractor for Your Window and Door Installation

The right contractor is local, licensed, fully insured, has real reviews, and gives you a clear written quote before any work starts. Picking the right contractor for your window installation...

See What Our Customers Are Saying About Us

“The company to use if your needing window replacement, Fair pricing and honest fast work.”

Tom Reavis, GA

“Fantastic Company and true to their word! The crew was so professional and polite. We had our entire house of windows done and it only took 2 days. The quality of these windows are amazing and we couldn’t be happier! Don’t pay the high price that other companies want. This is the real deal!”

Jennifer Rochester, NH

“The Window Source of Tulsa was recommended to us. We received bids from three window replacement companies. Window source had the best product at the best price. The installation was on time and professional. We were kept informed through out the process. We are very pleased with the final product. About two weeks after the windows were installed I broke the outside pane of one window while mowing the yard. I contacted Window Source and told them what had happened, offering to pay for the replacement. They replaced the window free of charge. They are a pleasure to do business with.”

Alan McIntyre, OK

“Excellent service, product, and less than half the price of the other 2 estimates I had. Installer cleaned up after himself and was very professional.”

Ian Gollahon, OK

“Quality windows at an affordable price. Love our windows! Talked to several companies, but The Window Source offered top notch windows at the best price. Sales and installation crew were very nice, knowledgable and professional. They did a great job.”