On 25/11/2010 17:05, Dave Liquorice wrote:

I findrt it really stupid that the houses with any solid walls (not just
entirely solid wall) are not getting internal insulation grants.

I agree and not purely because I'd benefit from such a grant. But it
takes a compartively long time and is very disruptive compared to
squirting something into a cavity... The former is expensive the
latter cheap.

Trouble with grants is that even if you can get one the grant comes
complete with a rip-off merchant who gets all the benefit and you end up
with a job you could diy for less without any grant.

Some time ago I came across information on a product called hempcrete -
a mixture of hemp and lime mortar - which apparently has good insulation
properties and is hideously green (allegedly negative CO2).
Unfortunately at the time all the information I could find was on
casting it into blocks for building with and I was looking for some sort
of insulated plaster to go on the inside of my solid stone walls.

Having had my interest rekindled by this thread I did a quick search,
passing on a video apparently spraying the stuff onto the outside of a
building before coming across this:

http://www.youtube.com/watch?v=79gyuGToxKQ

Plastering the inside of a building in Switzerland.

Now that is the sort of diy I could do if only I had a bit more
information on the detail but I am not sure what thickness would be
needed to satisfy current BRs so perhaps I should wait another ten years
for the appropriate section to be consigned to the con-artists bonfire
of regulations. ;-)