We have measured all the windows in the Garage (11 of them) and all of them came out within 2mm! phew! We are currently asking for double glazing prices for a basic unit without all the fancy coatings. After all these windows are just in the garage!
In the meantime, we have finished planning the Oak frames and sliced them up into each individual piece. We need to cut a small slope on the pieces that will go outside to encourage the rain to run off. We have ordered a 22degrees angle cutter.