Rooflights have become increasingly popular as a way of bringing natural light into a building. They have many benefits, including energy savings, improved wellbeing, and higher property values. However, choosing the right rooflight can be confusing, especially when it comes to technical terms such as u-value. In this article, I will explain what u-value means for rooflights and why it is important for potential buyers.
What is u-value?
U-value is a measure of the amount of heat transfer that occurs through a material. In the case of rooflights, the u-value represents the amount of heat that escapes through the rooflight material. The lower the u-value, the less heat is lost, and the better the insulation properties of the rooflight.
Why is U-Value Important for Rooflights?
The u-value is an essential factor to consider when choosing a rooflight because it directly affects the energy efficiency of a building. A high u-value means that more heat is escaping from the building, leading to higher energy bills and increased carbon emissions. Therefore, choosing a rooflight with a low u-value can make a significant difference in energy savings and overall comfort levels.
How is U-Value Measured?
The u-value is measured in watts per square metre kelvin (W/m2K). This means that the amount of heat escaping through one square metre of the material is measured, in watts, for every one-degree Kelvin (°k) difference between the inside and outside temperatures.
For example, a rooflight with a u-value of 1.2 W/m2K means that for every 1-degree temperature difference between inside and outside the building, 1.2 watts of heat will escape per square metre of the rooflight.
What is a good U-Value for a Rooflight?
The recommended u-value for rooflights depends on several factors, such as the type of building, the location of the building, and the climate. In general, a u-value of 1.2 W/m2K or lower is considered excellent for most applications. However, in colder climates, a lower u-value may be necessary, while in warmer climates, a slightly higher value may be acceptable.
In summary, the u-value is a crucial factor to consider when selecting a rooflight. A low u-value means that the rooflight provides better insulation and helps reduce energy consumption and costs. When buying a rooflight, be sure to check the u-value and choose one with a lower value for maximum energy benefits.
HITECH Rooflights U-Value differs depending on the product you are purchasing. View our shop today to see our U-Values.