Replacement windows · installed by RADIANT
ALLIANCE Window Systems
Alliance makes fusion-welded vinyl windows, with two replacement series — Hawthorne and Belmont — built by a network of independent regional manufacturers. RADIANT installs Alliance windows, and we'll tell you plainly whether they're the right value for your home.
See Alliance on display at our Southlake showroom — 500 N Kimball Ave #106, Southlake, TX 76092.
Product lines
Alliance Window Systems products are built by members of the American Window Alliance, which describes itself as a national network of independent manufacturers. The Alliance site lists member plants in Chicago, IL; Little Rock, AR; Attleboro, MA; and Pittston, PA. The series details below come from member manufacturers’ published product pages.
The flagship replacement series, with the most standard features.
A value-focused replacement series, with more features offered as options.
Alliance also makes the Windgate series, which is designed for new residential construction rather than replacement. Hawthorne patio doors are available too — ask us if you’re replacing a slider at the same time.
Window styles
Availability varies by series — we confirm each opening during your estimate.
Energy & glass
Alliance pairs its InnovativE Low-E insulated glass with a Duralite composite warm-edge spacer, and says each regional manufacturer tailors its insulated glass units to the local climate. In a North Texas summer, the glass is where most of the heat gain happens — so we look at the glass package first, not the frame color.
Alliance publishes U-factor, solar heat gain and air-infiltration values on a performance values page. We’ll pull the numbers for the exact glass package on your quote.
Warranty
Alliance’s Assurance Plus Limited Lifetime Warranty covers manufacturing defects and component failures — materials for a lifetime and labor for five years — and is transferable to a second homeowner for up to 20 years. Hawthorne also lists a lifetime glass breakage warranty as standard. Read the full terms on the manufacturer’s warranty page.
RADIANT reviews coverage with you at the estimate.
Honest fit
Bring your questions to the showroom. We’ll put samples side by side and explain the trade-offs without pushing a brand.
If your windows open, close and lock fine and the frames aren’t warped or rotted, replacing just the glass may be all you need. We’ll tell you honestly which windows qualify.
Alliance Window Systems products are built by members of the American Window Alliance, a network of independent regional manufacturers. Member plants listed on the Alliance site are in Chicago, Little Rock, Attleboro (MA) and Pittston (PA).
Hawthorne is Alliance’s “best” replacement series, with Low-E glass and a lifetime glass breakage warranty standard, plus bay and bow options. Belmont is the “better” series, focused on value — it adds single-hung and single-vent slider styles and offers Low-E as an option.
The Assurance Plus Limited Lifetime Warranty covers manufacturing defects and component failures — materials for life, labor for five years — and transfers to a second homeowner for up to 20 years. We walk through the full terms with you at your estimate.
Yes. Alliance is on display at our Southlake showroom, 500 N Kimball Ave #106. We’re open Monday–Friday, 8:00 AM–5:00 PM — call (817) 565-3652 to set a time.
Yes. Financing through Medallion Bank offers terms up to 144 months. See financing.
Specifications and warranty terms change; always confirm against the manufacturer’s current literature. Alliance is a trademark of its owner; RADIANT is an independent installer.
Visit the Southlake showroom or book a free in-home estimate. Itemized quote, no pressure, no obligation.
