Norfolk Greenhouse

Has anybody used one of these greenhouses if so are they ok given the price and what is the life span of the glazing material it would be good to get some reviews before I consider buying one

 

I bought one and sent it back, the materials seemed very flimsy, it was personal choice, I did receive excellent service though.
It was also very complicated to erect the pieces all have to be joined to get any length ie axis.

 

Thanks for your reply I was wondering from there own discription and it looks there are no vents