Frame Conductivity Energy Efficient Window

Frame conductivity

Frame conductivity determines how quickly heat energy flows from “where it’s hot to where it’s not”. Consequently, lower frame conductivity means the inside of the building is better insulated from the outside. This is measured in the window industry with a “U-value”, where a lower figure indicates superior performance.


Rylock’s three product suites all use different techniques to produce low U-values. Our AA Series outperforms many competing aluminium windows by shielding the inside of the product with a hardwood reveal. TB Series products are thermally broken, featuring a polyamide insulator between inner & outer faces, while the SG Series uses an inline reveal to create an erntry-level energy efficient product.


What is a "U"-value?