I would not recommend this company. Had the windows installed in July and completed 6 weeks later. They decided to replace our french doors minus a lintel and tried to fob me off by saying it was not required. After contacting a structural engineer and FENSA, it turned out that a lintel was required as the installation was dangerous. They use contractors to install the windows and doors and have targets to meet inorder to quickly progress to the next job. The windows may be energy efficient but not the gaps between the windows and wall. Their complaint service is non existent. Rang and emailed the Customer Service Team and to this day still no call back. Personally, get the work done by a reputable local window installer.