We are a generation that has become accustom to Amazon next day deliveries, therefore we can sometimes forget that tradespeople have lengthier lead times.
In the case of high-quality windows & doors, these aren’t off the shelf products. The best windows & doors are hand crafted, made to measure and bespoke for your homes, therefore there is a longer production process involved. Also, the most reputable companies are likely to be busier and will have a larger order book to fulfil.
Please remember that your windows & doors could be in your home for the next 30 years, therefore it is worth waiting a few extra weeks for your ideal choice of windows & doors.
TOP TIP: Let quality, price and service dictate your buying decision as opposed to quick lead times.