John Laird wrote:

On Wed, 04 Feb 2004 01:21:20 +0000 (GMT), Dave Plowman
wrote:

In article ,
Huge wrote:
Our 1950s semi in Barnet was like that. We never had rain in, but we did
get 2" of snow in there, once. (

Older houses in the NE of Scotland (where I'm from) have T&G under the
slates to stop this happening.

I can vouch for at least one modern house in SW Scotland in this regard. I
believe it is generally termed "sarking".

My house was built about 18 years ago - northwest Scotland - and it has
'sarking'.