As we left Cartagena yesterday it was a pleasant, sunny day and 18ºC. Six hundred metres higher in Culebrón we were down at 15ºC but it was still sunny and pleasant. Inside the house though it was pretty arctic with the motionless cool air in the living room literally taking my breath away.
One of the photos has the cat Eduardo sitting in front of one of the gas heaters that we use to keep the rooms warm. In the living room we also set the air conditioner to heat, that plus two gas heaters and we can get the room nice and warm. The trouble is that the heat just vanishes as soon as we stop pumping the calories in. The other photo with those nice air gaps around the kitchen door perhaps indicate why!
Alicante country houses of a certain age just aren't insulated in any way.