In message , Paul
D.Smith writes
OK, you've guessed it; the entire greenhouse slipped 6 inches sideways this
weekend in the gales. Remarkably, no broken glass. That's the warning for
those planning to build a greenhouse - "bolt" it down.

Now the question - how? My concrete is about 4inches x 4inches

A very small greenhouse.........
on a
hardcore base (sunken into the ground) so won't take rawlbolts.

Why not? An SDS drill should drill holes in that without any great
problem

I'm
considering a piece of dexion hammered into the ground in each internal
corner and then bolting this to the steel base.

Sounds OK in principle.

Do the readers think I need
to concrete the dexion in as well or would 2ft long pieces sunk into the
ground be enough?


I would think that a hammered into the ground would be fine in terms of
holding firm. Though you will need to get it in exactly the right place
to fix the GH to, not always easy when hammering in (and the top will
get a bit bent as well probably).

I would concrete shorter lengths in.

Put the GH in the correct place if necessary. Dig the holes, bolt the
Dexion to the GH with the Dexion in the holes, then put the concrete
around the Dexion.

I bolted length of treated timber to the blockwork base of ours and then
fixed the GH frame to the timber.
--
Chris French and Helen Johnson, Leeds
urg Suppliers and References FAQ:
http://www.familyfrench.co.uk/garden/urgfaq/index.html