"Derek" wrote in message
...
On Wed, 09 Jun 2004 02:41:10 +0100, Lobster wrote:

..... a joiner who later surveyed my
handiwork said I could/should have used the much lighter aerated type
instead. Is that right? If so I could at least use those for the
second doorway!


Did he say why? Was it due to the load on a concrete slab below?

No, it was more that he thought my blocks were overkill for the job, and
that I'd subjected my spine and car suspension to unecessary grief!

David