Window terms and definitions from Synergy Plus LLC
There are currently 4 names in this directory beginning with the letter R.
R-Value ResistanceResistance a material has to heat flow. The higher the R-value, the greater the resistance.
RailThe horizontal sections of the sash.
Raised ExteriorAn angled extension from the frame that adds an aesthetically pleasing dimension to the exterior of the window.
Roll formed Screen FrameA method of fabrication in which a flat (usually Metal) material is placed on a machine where the material is formed into a shape using differently shaped rollers and pressure
