DOUBLENATURE

Windows and structural parts therefor; sliding windows; vertical windows; thermal windows; horizontal sliding windows; fixed windows; panoramic windows; vertical sliding windows; hung windows; casement windows; awning windows; push-out casement windows; bay and bow windows; window frames, sashes and casements; doors and structural parts therefor; entry doors and entry door frames; sliding patio doors; hinged doors; door frames, sashes and casements; all of the foregoing made primarily of non-metal materials