Ok it’s cold, and yes we’ve had snow, but I can confirm you can build decking in January.
I am currently working on building a decking for a client in Wigan.
It consists of two simple levels with one wrapping round an extension, 3 small steps up from the garden, no hand rails, all on top of existing paving stones.
The client wanted a clean new look and didn’t fancy new paving stones, so she decided on decking.
The project is due to be completed in the next week when I’ll have some before and after pictures.
So if you are looking to have decking built why wait? There really is someone crazy enough to build decking even in the depths of winter. As the guys at the timber yard said “you must be mad, this is the earliest in the year we have ever sold decking”.