10 percent off the competition. We will beat any estimate, you must provide a written quote from reputable  company. 302-478-4100 Click here for a Free Estimate

About Us

Windowman - in Delaware since 2002

Windowman L.L.C. was established in 2002 by Glen Mayhart to address the need for trustworthy, experienced home improvement contractors. With his extensive training and 30 years of experience in the home improvement industry, he felt he could offer a better experience to his own customers by hiring only the best trained installers and offering quality products.

Glen is life long Delaware resident who is a hands-on owner who stays very involved in your project. You will most likely see him visit the job site.

Unlike all other company’s who offer only one or a limited selection of windows. Windowman offers them all! Contrary to what you may be told there is no window that we cannot get and install for less, guaranteed. This also applies to doors, siding, and roofing.

  • Locally owned and operated
  • Member of the Better Business Bureau of Delaware
  • Lifetime warranty.
  • 100% Satisfaction Guaranteed
  • Home of the “Trust Contract” If you trust us to work on your home, we trust you to pay us when the job is complete to your satisfaction.


Areas served:

New Castle County Delaware: Arden, DE | Ardencroft, DE | Ardentown, DE | Bear, DE l Bellefonte, DE | Clayton, DE | Delaware City, DE | Elsmere, DE | Middletown, DE | New Castle, DE | Newark, DE | Newport, DE l Odessa, DE | Townsend, DE | Wilmington DE

Delaware County Pennsylvania: Aldan | Aston | Bethel | Brookhaven | Chadds Ford | Chester City | Chester Heights | Chester | Clifton Heights | Collingdale Colwyn | Concord | Darby | Darby | East Lansdowne | Eddystone | Edgmont | Folcroft | Glenolden | Haverford | Lansdowne | Lower Chichester | Marcus Hook | Marple | Morton | Nether Providence | Newtown | Norwood | Parkside | Prospect Park | Radnor | Ridley Park | Ridley |Rose Valley | Rutledge | Sharon Hill | Springfield | Swarthmore | Thornbury | Tinicum | Trainer | Upland | Upper Chichester | Upper Darby | Upper Providence | Yeadon

Chester County Pennsylvania: Atglen | Avondale | Downingtown | Elverson | Honey Brook | Kennett Square | Malvern | Modena | Oxford | Parkesburg | Phoenixville | South Coatesville | Spring City | West Chester | West Grove