We never close our shutters. For one thing, a couple are barely hanging on to rusty hinges and are pretty old and decrepit anyway. We have put in double glazing and insulated after, thereby sealing round all the weak points where they are inserted. For the length of winter here in the SW it would be false economy to go for triple, so instead we did that. So far so good. There are nooks and crannies where, come what may, hurricanes howl in directly from the Arctic via an unbeknown route direct to our house. If it is an old house, it is as sure as anything could be that where beams sit on masonry there will be gaps, small but that act like air jets. Occasionally the blasted mice make their holes by tunnelling adjacent to beams. It is surprising how a hole you can barely get a finger into can generate gusts that all but blow you over occasionally. We are forever chasing these things, in goes the silicon and the plaster finish only to find that for lack of another way of doing it, one of the other places is generating a new gale. So time for silicon and plaster all over again. Three years and some now and we are gradually getting on top of it. No doubt the house has a mind of it own and will revenge our nerve for stealing the oxygen it has been receiving for pushing 300 years.
In fact, sitting here in my office with no electric heater on and near zero outside, I am waiting for the radiator to get its nice hot water from the stove I built up a bit before six. Once it starts to warm up it is really pleasant. It is also one of the rooms where there is still no double glazing because when this part of the house is re-roofed, we intend to change the windows. We only have one window facing N/NE which is the direction to watch out for and that is a tiny toilet window (the other post on loos for reference, too small for a wash basin) in our case, but the radiator keeps that toasty all day being the first one the heat arrives at.
We are used to visiting people and needing torches (although we don't, of course) to find a coffee cup. When they visit here they always remark on how light and bright it is. But then it is actually quite gloomy with the shutters open in our opinions. We have to have power saving lights everywhere because even if sun is streaming in and the light is almost blinding, OH and daughters all put on lights. All three fail to put them off when leaving the room. I often go on a tour of the house switching them off. Yesterday, for example, I found two on in OH's room when she was out, girls' room another two, two corridors with a light on in each and both loo and bathroom! Six lights with me the only person in the house using none of those parts of the house. If we had regular bulbs who knows what the bills would be like? If anybody remembers the Braveheart film, it illustrated Scots walking about with bare legs, no underwear and even stripping off to X with white clouds of breath from mouth and nose, that is rain (summer) or rain (winter, but colder). Well, fortunately I am like that. None of the female folk are at all, so we heat... and chase the hurricanes.
So, it is all very complicated and unless we have a small fortune to spend on a virtually hermetically sealed, ultra-modern new build with an independent pv or wind power generation system, my conclusion is that we live with it.