Choosing the right upgrades
There’s no one-size-fits-all solution to make your home more thermally efficient and minimise heat loss.
For example, if you were thinking about a more efficient boiler you must first consider how well insulated your home is to avoid heat escaping through the walls, floors, and roof.
Likewise, you may consider upgrading your windows and doors, but swapping them out for more modern, energy efficient options won’t make a massive difference unless your current windows are poorly sealed, and have been identified as a problem area. Unfortunately, if the majority of the heat loss is through the walls or the roof, upgrading the windows is unlikely to do very much at all.