The lower the U-value, the less heat is lost
We offer the opportunity to retrofit existing windows with the latest in thermally-efficient double-glazing glass units.
U-values measure how effective a material is as an insulator. The lower the U-value, the less heat is lost and the more insulation the material provides.
You can see that more heat is lost through windows than the same area of wall. You will also notice that Low-E-Plus™ heat-retaining glass reduces U-values by as much as 80%.
The table shows the U-values of the various materials used in a building. Of all these materials, glass is the poorest insulator. You can see that more heat is lost through windows than the same area of wall. See how Low-E-Plus reduced u-values by As much as 80%
|Material Type||U- value|
|Cavity Wall||Without Insulation||1.6|
|Solid Wall (block & plaster)||2.3|
|Cavity Wall (block/polys/block)||0.58|
|Cavity Wall (timber framme with above)||0.46|
|Windows Old Double Glazing(24mm)||2.8|
|Triple Glazing (24mm)||1.3|
|New LOW-E-PLUS-Glass Only (24mm)||1.0|