The master frame is made from extruded, heavy-gauge aluminum This keeps the window rigid so it doesn’t flex in the wind.
Corners are butted together – not mitered – so window stays square ensuring sashes won’t fall out.
U-channel expanders compensate for any deviation in house window squareness by sealing tight against out-of-square casings and blind stops.
Both U-channel expander and master frame are thick so window is a true flush mount system, not just an applied expander like other systems.
Glass is marine-glazed to ensure a waterproof seal.
Sashes edges are sealed with fin and pile weatherstripping on both inside and outside to halt wind infiltration and provide for greater thermal sealing. Sash channel is protected with metal so no exposed plastic parts can break off.
Sash pins and latches are made of metal to ensure durability. Protruding pegs make latches easier to operate.
Latch detents ensure sash can be opened incrementally and securely locked at bottom.
Panes and screens are easily removed from the inside for cleaning.
Weep holes slits allow for moisture drainage thereby protecting wooden sills from pooling water. Offset, hidden drain holes block outside wind gusts.
Baked enamel finish available in common historic colors of white, cream, and dark brown. These windows resemble original wooden storms/screens and are suitable for restoration applications, but they have much greater thermal effectiveness and don’t need regular maintenance or to be swapped out twice a year, which is inconvenient and potentially dangerous especially when working from heights on the upper level of a house.
Includes a ten-year warranty but will likely last much, much longer.