Truly Insulated Mainframe

Two chambers filled with the same insulation found in high-end coolers

Offers seven times better R-Values than hollow-frame vinyl windows

Insulates twice as well as competitive foam-filled frames

Aesthetic Engineering

Designed to match the beauty and elegance of wood windows

Narrowline, dedicated extrusions adds beauty without sacrificing strength

Coved, mitered interior glazing beads add styling and additional security

Climate-Specific Performance

ENERGY STAR® qualified for all climate zones

Some of the lowest U-Factor and SHGC numbers available in the market

Secure, long-lasting seal, with edge deletion, provides superior performance that’s guaranteed to last a lifetime

Secure Sash Structure

Low-profile French cam locks routed into the frame

Locks fastened through three layers of .075 iUPVC

Scores 10 out of 10 on AAMA forced entry test

Airtight Construction

Fusion-welded with no weep holes

Triple weather stripping at every point of contact
Dedicated extrusions and step jambs

One of the lowest published air leakage rates available in the marketplace

Superior Functionality

Self-tensioning block-and-tackle balance system; same system used by the higher-cost, name brands

Engineered to last four times as long as competitive systems

Locking pin and shoe ensures easy, secure tilt-ins for simple cleaning

Coordinated recessed night latches extend out from the frame to allow ventilation

Up To 27% More Viewing Area

27% Greater visible viewing area than traditional vinyl windows

Mulled with one of the narrowest systems available to maximize viewing area

Precision Frame Fabrication

Fully fusion-welded frames and sashes provide stronger, more airtight windows than mechanically fastened competitive products

Complete closed frame system keeps water from entering the mainframe, eliminating the need for unsightly weep holes

Made from iUPVC, a high-tech, synthetic polymer that offers significantly better energy efficiency than wood or metal windows