Quote Originally Posted by grahamw48 View Post

In a normal house I wouldn't suggest our type of cavity wall, as it would soon be full of insects and vermin...as with the roof space.

Insulate certainly, but choice of materials is much more critical in the tropics where there are dozens of life forms seeking opportunities to munch on your home, conceal themselves within it, or both.
Yes. I suppose a cavity wall would make a great nest for snakes!!??