What is the R-value of Radiance Low-E Wall Finish?

R-value is a measurement of resistance to conductive heat. Radiance Low-E Wall Finish controls radiant energy, so it has an e-value that corresponds to its emmissivity. The lower the e-value, the more efficient it is in managing radiant energy.

If 80 - 85% of heat enters and leaves through the roof, isn't it most important to put Radiance Low-E Wall Finish on the ceiling?  Why bother with the walls?

Everyone knows hot air rises (convection), but radiated heat is different - it moves in all directions and is absorbed by walls as well as ceilings.  For best results, you should paint both.

Do all the walls and ceilings need to be painted?

All walls and ceilings in a home or building should be painted for maximum energy savings.  However, by coating just one room, a higher level of comfort can be achieved.

Can I use less wall and ceiling insulation with Radiance Low-E Wall Finish?

Insulation deals primarily with conductive heat.  For best energy efficiency, you should use both.

My living room has a lot of south facing windows.  In the summer, won't Radiance Low-E Wall Finish trap the heat coming through the windows?

The heat will be trapped within the wall itself, and with Radiance Low-E Wall Finish, the heat will be released more slowly.  So it actually helps keep the sun-induced heat peaks under control.

When the sub heats up the outside walls in the summer and travels to the inside, will it be trapped in the walls when it hits Radiance Low-E Wall Finish?

No, the amount of energy which is not emitted into the room will go back through the wall via conduction, and released to the outside.

How much can I save?

Estimated savings for heating and cooling costs can be as high as 30 percent, depending on the climate and the structure.