The glib answers to "What is the best time of year to have double glazing installed" might be "when the company offers discounts", or "before your own windows fall out". However, it is a valid question that deserves some thought.
People often think about heat-proofing their home during cold winter months. The wind howls through gaps in sashes and when you find frost on the inside of the panes, you realize that replacement double glazed units might be a god idea.
You may not just want to keep out the cold. Sealed units provide additional sound-proofing and can even be triple-glazed if your noise nuisance requires. An inexpensive way to achieve additional sound-proofing while maintaining the external look of your property is to install secondary glazing inside the existing frames.
Installing new units can be relatively painless. Prior to the big day, the contractor will take accurate measurements of the voids and discuss your requirements regarding style and finishing. They are then normally made to measure so they easily slot into the 'holes' left when your existing frames are removed. The contractor then fixes them securely and seals any small gaps around the frame.
While the process can be remarkably quick, there is a period of time where you have a great big hole in your wall. If you are horribly unlucky, the old window was trashed taking it out, and the new one doesn't fit. This mean you could be open to elements overnight or longer.
The best time of year to have double glazing installed is when the weather is likely to be good. You don't want the wind and rain getting in, even for short periods. Installations performed when it's raining might trap unwanted moisture and cause problems later, so contractors prefer to work when it's dry.
