On 22/06/2019 09:31, Tim Lamb wrote:
In message , Brian Reay writes
Jim GM4DHJ ... wrote:
why do the English not use sarking ? ....




They do.

Some older houses may not have it but more modern ones certainly do. All
the houses we own/have owned have sarking felt.

Huh! Now try and get your builder to use it!
They have latched on to porous membrane in the firm belief that roof
ventilation is no longer necessary. Also try and get them to use the
grade required for your area wind prediction and double sided tape for
laps:-(


I think building control have tied their hands on that matter.