Thanks all. Insulation is 300mm, have checked - actually slightly more.
Seals on the window seems good so going to upgrade to a double radiator.
Just need to find the time as we have two small kids and husband will fit it.
Does anyone know if thermal wallpaper is worth it?
Do you measure loft insulation in depth? It’s the same as the rest of the house quite deep - at least 5cm. If you want an exact figure I will have to go up in the loft and check.
Just looking for some advice, we have a detached home built in the late 90’s that has both cavity wall and loft insulation and a mix of single and double radiators.
The boiler was replaced 4 years ago.
The South West corner bedroom is exceptionally cold in cooler weather and exceptionally warm...