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R
R-value
- Resistance a material has to heat flow. The higher the R-value, the greater the resistance.
Radiation
- Wave energy transmitted directly from one object to another through the atmosphere or through transparent or translucent materials. The energy radiated is either transmitted, absorbed, reflected or a combination of all three.
Rail
? Horizontal members of a window sash or door panel.
Raised Exterior
- An angled extension from the frame that adds an aesthetically pleasing dimension to the exterior of the window.
Resin Art Glass
- A look of stained glass is handcrafted directly onto the glass during the manufacturing process.
Rough Opening
? The opening left in a frame wall to receive a window or a door unit. The jack studs on each side, which supports the header across the top, form it. Cripples support the rough sill at the bottom. The rough opening generally allows 1/2? or more in each dimension in excess of the window or door unit dimension. Openings in brick walls are known as masonry openings.
Rough Sill
? The horizontal rough framing member, usually 2 X 4, which forms the bottom of the rough opening.
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NYC# 1277038
Rockland# H-10819-07-38-00
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Yonkers# 4370
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