For historic appearance and high efficiency, we offer The Magnum Replica Sash System. The Magnum was developed prior to the availability of Vacuum Insulated Glass and occupies a lower price point than the Ultima. But the Magnum has a quicker turn around than the Ultima since its standard Insulated Glass is available domestically. The new sash not only has insulated glass, but is totally weather-stripped with contemporary, hidden materials. Once installed, the most vulnerable parts of the window frame are forever protected from the elements.
The Magnum is perfect in deeper commercial jambs, casement application and/or where the project calls for single lite sash.
Efficient double pane insulated glass used in modern windows.Learn More
We use sash profiles from the period your home was constructed.Learn More
Minor jamb modifications and hidden jamb liners for install.Learn More
Our Window Logic weather stripping system keeps windows air tight.Learn More
We use the Constant Force Balance System for "stay put" operation.Learn More
We use strong, durable, and time tested mortise and tenon joinery.Learn More
Modern efficiency, but indistinguishable from your original windows.Learn More
The spacer is a hollow piece of extruded aluminum with “micro-perforations” along the inside edge, which allows the spacer to breath the air trapped between the glass. It’s filled with a granular desiccant (like in the small bag you find in some packaging) and inset from the edge of the glass approximately 1/8″ – 3/16″. The unit is assembled and “back-filled” with “hot-melt” polysulfide (or other sealing compound), which is heated to the consistency of peanut butter and injected behind the spacer. The desiccant is now trapped in the sealed unit and sucks the moisture from the dead air space that has been created. Because there is no moisture between the glass, changes in temperature cannot cause condensation which results in fogging the glass.
In the case of the Magnum IG units (pictured above), a special dual seal system is employed. The primary seal is a “butyl rope” that is applied to either side of the spacer in its specially formed concavities. The unit is then run through a special IG oven-press to heat the primary seal and press it to form a perfect seal between the glass and the spacer. This primary seal also serves the purpose of creating a “thermal break” between the glass and aluminum, to help prevent temperature transfer across the spacer. Once the unit passes through the oven-press, the polysulfide secondary seal is then “shot” in behind the spacer to now form two seals for greater protection against moisture infiltration.
Glass fogging happens when the IG unit has gone irreparably bad. When an IG unit fails, or fogs, the seal has broken, allowing moisture laden air to enter between the glass. Eventually the desiccant will saturate and become inert. Then, the next time the temperature drops, condensation will form between the glass and cause the fogging, which is indicative of a failed seal. The unit is ruined and the only remedy is replacing the glass.
Unless otherwise requested, the Magnum comes standard with Low-E glass (low emissivity). A Low-E unit has a practically invisible, metallic coating on the inside surface of the exterior lite of glass. This coating helps reflect heat back into the room in the winter and back outside in the summer, creating a more comfortable atmosphere for you. Both the interior and exterior lite of the Magnum IG unit is “double-strength” (1/8″) glass unless tempered glass is mandated by code.Learn More