I have a query that you might help me with please.
My son is currently building a polycarbonate greenhouse for me. He has built the frame and has put in some windows.
We are worried that we might not select the correct polycarbonate for the greenhouse. Is 4mm, twin wall good in Ireland or should we go for 10mm twin hall?
Any advice would be REALLY APPRECIATED. There are varying views on the internet!
With many thanks to you for your time, it is appreciated.
Mary
Hi Mary,
thanks for your question! It depends on what your needs are, when you plan to use it most, where it is positioned - it’s really a matter of choice.
Thicker polycarbonate like the 10mm will trap more heat, keeping the tunnel warmer in winter, reducing heat loss if you plan go heat the space. It will also be stronger in the face of winds or snow load.
On the other hand, it will be a bit harder to shape into position when making your Polytunnel. It will also be warmer in summer, so ample ventilation will be needed and possibly shade cloth if the tunnel is in full sun all day. Bear in mind that even thinner wall polytunnels can reach more than 40C on sunny summer days!
Hope that helps you make your decision! Little Green Growers