tzd3sw wrote:
I'm building a thermalite wall between my garage and what will
be a utility room. This wall will have a door through. What
size gap should I leave for the door and frame ? Is there a
standard size ? This will be a firedoor if it makes any
difference.

Buy your frame, and build it in. This will make it easier to get
a good fixing, and you will be dead on for size.


J.B.