Useful (old) info on fireplaces and chmneys...

[The Natural Philosopher]

[Tim+]

Very timely. My daughter's just bought an old place and wants to open up a fireplace. Ta.

[Tim Watts]

Yes - completely fascinating.

It is interesting to note that the acceptable separation between flue and combustibles seems to be a half brick - though it does say there should be a 2" gap between roof woodwork and the chimney wall.

Whereas English building regs say a full brick (200mm).