Energy efficiency is a key consideration in retrofitting projects, aiming to reduce energy consumption and carbon emissions. uPVC doors and windows are renowned for their excellent thermal insulation properties. By replacing old, inefficient windows and doors with uPVC alternatives, buildings can experience significant improvements in energy efficiency. The multi-chambered design, low conductivity of uPVC profiles, and the option for double or triple glazing help minimize heat transfer, reduce air leakage, and enhance insulation. This upgrade helps to maintain comfortable indoor temperatures, reduce reliance on heating and cooling systems, and lower energy bills.