The timescale that should be allowed when it comes to installing replacement windows it will depend of-course on the size and how complex the actual job is, On average most jobs tend to take between 2 to 3 days with some taking slightly longer, hopefully there is not too much disruption once the installation is underway. It is probably worth considering the time of month to have the work done, maybe it isn’t the best thing to have them installed during the coldest time of the year, especially if there is snow on the ground! To be fair most of the companies that you would choose to use, are well versed in installing replacement windows so the amount of hassle or grief should really be kept to an absolute minimum. So within a short period of time you can be enjoying fantastic new windows that keep the heat in and the noise out, so don’t delay get sorted out installing replacement windows today!