You can find reliable window fitters by requesting referrals from friends or family, checking online reviews, or logging on at Easefix, a reliable homeowner app.
Easefix offers window installation, replacement, and repair. They may also offer other services, such as door installation and repair.
The time it takes to fit new windows in your home depends on the number of windows installed and the installation's complexity. Generally, it can take a few hours to a few days to complete the installation process.
BS 6375-1 is the standard when choosing and specifying weather-resistant windows and doors. In case of uncertainty, please check with the manufacturer.