Vinyl Window R Value

R value measures how well certain building insulation materials can resist heat.

Vinyl window r value.

The higher the r value the greater the resistance. The higher the r value the greater the insulation performance. John wiley sons inc 2006. To compare r value and u factor.

When shopping for windows or doors look for higher r values and lower u values for the most energy efficient products possible. Alside windows are custom made to fit existing window openings. Optional foam insulation can further increase energy performance. The r value is the measure of heat flow resistance the higher the r value the better.

Better windows have high r values and low u factors see table 1. When determining how much insulation you need don t guesstimate calculate. The lower the u value the slower the rate of heat flow and the better the insulating quality. A double pane window with a low e coating will have an r value equivalent to or better than a triple pane window.

R values of uninsulated concrete. While they are related different assumptions and test criteria are used in calculating the two values so they cannot be directly converted. The rate at which the glass transfers loses heat. The r value as it is known to most consumers is really an inverse representation of the u value.

Energy and the environment. Concrete homes magazine web search 5 18 2010 r value for concrete glass other materials wikipedia web search 5 18 2010 citing ristinen robert a and jack j. A window is considered to be low e if its emissivity is 0 35 to 0 05. U value is the amount of heat transferred through a material.

Ultimately when talking about windows the u and r values are both a representation of the same thing. As a window s emissivity decreases its r value increases. If you like math a u value 1 r value the u value is the inverse of the r value. We ve designed the entire window including the frame and sash to perform at its best.

Standard clear glass has an emissivity of about 0 84. Our windows and doors are engineered for energy efficiency. The more common term r value refers to the resistance of the window to heat conduction and it is the inverse of the u factor that is r value 1 u factor. Fortunately window technology has greatly improved so it is now possible to have large expanses of windows.

Since the different parts of a window all have different u factors. Alside vinyl windows have several replacement and new construction lines including double hung casement and bay windows. A lower u factor means a better insulating window. How can a replacement window s u value be improved.

And we test them to the extremes so you can count on them to last.