Expert Window Services
Energy-Efficient Windows That Transform Your Home
Serving Greater Des Moines, IA and Minneapolis/St. Paul, MN since 2007
New Windows That Pay for Themselves
Drafty, outdated windows are one of the biggest sources of energy loss in a home. Thomas Exteriors installs high-performance replacement windows that reduce heating and cooling costs, block outside noise, and dramatically improve your home's curb appeal.
From double-hung and casement to picture and bay windows, we offer a full range of styles and configurations to match your home's architecture and your family's needs.
Our Window Services
Full Window Replacement
Complete removal of old windows and installation of new energy-efficient units with proper flashing, insulation, and trim work.
Storm Damage Window Repair
Hail and wind can crack glass, damage frames, and destroy seals. We assess storm damage and restore or replace affected windows.
Double & Triple Pane Glass
Multi-pane windows with argon or krypton gas fill provide superior insulation, keeping your home comfortable year-round.
Bay & Bow Windows
Add architectural interest and natural light with custom bay and bow window installations that expand your living space.
Egress Windows
Code-compliant egress window installation for basements and bedrooms — improving safety, light, and ventilation.
Insurance Claims Assistance
We document window damage, work with your insurance adjuster, and handle the paperwork to maximize your claim.
Our Window Installation Process
Free Consultation
We measure your existing windows, assess their condition, and discuss style, glass, and frame options that fit your home and budget.
Custom Order
Your windows are custom-ordered to the exact size and specification of your home — no off-the-shelf compromises.
Professional Installation
Our crews install each window with proper flashing, foam insulation, and interior/exterior trim for a weathertight, finished result.
Cleanup & Inspection
We remove all old windows and debris, clean up the work area, and inspect every unit for proper operation and seal.
Final Walkthrough
We walk through every window with you, demonstrate operation, and make sure you're completely satisfied before we leave.
Premium Window Brands We Install
We install windows from the industry's most trusted manufacturers — products engineered for Midwest temperature extremes and backed by strong warranties.
Andersen Windows
400 Series and 100 Series windows with High-Performance Low-E4® glass and fibrex® composite frames
Pella
Impervia® fiberglass and 250 Series vinyl windows with Designer Series options for custom looks
Marvin
Elevate™ and Essential™ collections with Ultrex® fiberglass exteriors and wood interiors
Simonton
StormBreaker Plus® and Reflections® vinyl windows with ENERGY STAR® certification
Window Replacement FAQs
Ready for New Windows?
Contact Thomas Exteriors today for a free window consultation and estimate. We serve homeowners across Greater Des Moines, IA and the Minneapolis/St. Paul, MN metro.