In a past life (I've had several), I had a number of friends who were professional building conservationists.
Sometimes, this was a lot of fun... I seem to have made it a feature of my life since childhood to try and get into places that I'd normally be barred from (my favourite was the school boilerhouse) so there's a certain frisson to being mates with people who have keys to all kinds of buildings that the public aren't normally allowed to visit.
Sometimes it was much less fun. There was a lot of tedious standing around, tutting at the use of the wrong paint (not just type, but also hue... and sub hue... and apparently sub sub hue), the wrong bricks (colour, shape, size, manufacture and patterning are all very important here), the wrong pointing (apparently the cementy bit between bricks and the order in which they're glued together also matters) and a lot of other 'wrongs'...
There was also a lot of arguing over just how far back to take a restoration... being a bit of a child of nature I always used to like to suggest "to the original oak forest" - this was received with derision until they realised that I was serious. I'd rather look at a forest than a stately home any day.
However, there was one phrase that used to come up from time to time, and that was 'Loose fit, long life'... It's a phrase that particularly puzzled me, because it always seemed to be applied to the most ramshackle old buildings; the ones that look like they'd been out on a particularly committed Friday night on the town and crawled home to slump in a heap in a corner of their neatly manicured garden at 3 in the morning... but it was a phrase that always seemed to meet with universal approval.
"Grand building Gromit... ay... look at them winders... them beams... never see that now... no siree... loose fit, long life..."
... and everyone would nod and chew on their cloth caps...