"Paul Giverin" wrote in message
...
Hi there,

This year, after many years of threatening, I finally got a
greenhouse.

I'm really pleased with it even though I was a bit late (May) to
make
full use of it this year but I'm really looking forward to next year
and
getting a full load of seedlings on the go. In the past I've had to
use
the window sills in the house which limits things and looks untidy.

Anyway I digress. The greenhouse is erected on a concrete plinth
that
was previously used for an aviary. I felt (rightly or wrongly) that
I
needed to do something to insulate the concrete because I though it
would be quite cold. I used two or three bags of cheapo compost and
spread it on the floor.

I can think of no reason why the compost should acquire a higher
temperature than the concrete.

Now I'm wondering if there was a better alternative or whether I
need to
use anything at all. I intend to use the greenhouse to over winter a
load of our plants which are in terracotta pots and prone to
cracking
with the frost. I've got some bubble wrap and will shortly begin to
lining the greenhouse with it. I've also invested in an electric
heater
to keep it frost free but also to help get a head start with next
years
seeds.

Any advice with the flooring appreciated.

The bare concrete will be just fine. Put the compost on the garden
where it will do much good.

Franz