14° downstairs at 645 this morning. Thermometer is nears the front door so probably the coldest place in the house. Not too bad all things considering.
yeah I'm tipping my hybrid flooring helped a lot over the previous "lets glue vinyl flooring direct to the slab" solution implemented by the builders. Our problem is draughts. The seals on the windows are rooted, the windows are single glaze and cheap and the back door has a gap big enough to stick a finger through.
Not really problems 80% of the year though so bit hard to throw any serious money at it all.
Our windows are single glazed, and since the house was built in the early 90s, the glass thickness is 0.5 mm less than the current standard. We had to replace a pane a few years ago, and the installer had to widen the channels in the frames cause they were slightly too small.
We do have roller shutters and curtains which help with the cold slightly.
For the window seals, if you're planning on replacing them eventually, run silicone or sicaflex along the edges. Doesn't look flash, but helps a lot.