Paving slabs on a good sharp/soft/OPC base?
strip foundations
May 28, 2019
8 Replies
Nah, poltergeist.
New greenhouse going up 4m x 3m roughly. Aluminium frame with glass. any recommendations for foundations. Its on good firm ground
Mine is is of a similar size, and was two courses of single bricks on concrete (not sure of the width & depth as I didn't do it) Maybe 15cm x
20cm?). The greenhouse was screwed down onto the bricks. That may seem like overkill, but with the sort of winds we seem to be getting these days it might be a reasonable precaution.
concrete blocks laid on sides or paving slabs
No need for 'real' foundations
+1, they're so light, and able to tolerate a little ground movement.
Not sure about that. Perhaps if the panes are fairly small, but if they're single Dutch Lights, even a slight amount of ground movement will cause the rectangular side frames to distort to parallelograms, putting stress on the glass, which then cracks. DAMHIKT.
Polytunnels are a better bet.
Indeed. I specified toughened glass panes for my greenhouse and I'm very glad I did. Twice, strange wind eddies sucked out the end roof panel (about 1500 x 300mm) and deposited - fortunately on the lawn - five metres away. Being toughened glass, the panel didn't break.
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