All Heirloom Window historically accurate wood window product solutions share identical features such as Accoya wood fabric, mortise and tenon joinery, traditional sash and muntin molding (ogee) profiles, Stainless Steel fasteners, superior Acccoya cladding, Constant Force Balance system and state of the art weather-stripping. What differentiates the models is the glass technology, sash thickness and suitability for various applications.
Heirloom Ultima Windows are unquestionably the most historically accurate window on the market with contemporary performance. See how Accoya wood and VIG combine to satisfy both preservationist and conservationists.
Magnum Windows are Heirloom’s original product and identical to the Ultima except the Magnum utilizes standard IG (Insulated Glass) which makes the sash thicker. See why it’s sometimes the best option.
Heirloom Classic windows are the classic historic replica window with either standard double strength glass or even wavy glass. The Classic is the right choice if True Divided Lite construction is required and it is available with or without Heirloom’s proprietary invisible weather-stripping system.