David Hill wrote:

I know it's an aluminium greenhouse.
So are mine, I bought 2 8ft x 10ft which I joined to give me a 20ft x
8ft house. the house has a aluminium U shaped base plate and it's easier
to drill through the base and screw into the wood than to fix directly
to the concrete blocks.

A factor which hasn't been mentioned is that, relative to brick
or concrete, aluminium changes length significantly over the
temperature range it experiences, so anything introducing a
little flexibility is welcome.

It is a long time since I had a greenhouse, but I remember
mounting mine on a brick base and putting a neat mortar fillet
against the frame. After a few seasons it had all cracked off.

Chris
--
Chris J Dixon Nottingham UK


Plant amazing Acers.