Dave Page wrote:
The Natural Philosopher wrote:

Lobster wrote:


When topping up old insulation (Rockwool) it's normal and more
effective to lay the second layer perpendicular to the first.


I think you mean 'orthogonal'


Perpendicular is walls... ;-)


I understood what Lobster meant, and feel that "perpendicular" was quite
appropriate.

Ah, but would you have understood if I'd said "orthogonal"? :-)

David