4mm vs 6mm polycarbonate

[gonewild]

If you're going to have a small greenhouse, you could have twin flexible poly and an inflator to keep it up. this could also be used over polycarbonate, and again if a small house (or you have help), you could take it off in the spring if you think you won't get enough light. many of our greenhouse roofs at work are inflated double-poly, even some walls

You could use the inflated double poly cover on top of your glass and have great insulation. Then if you wanted to you could remove it during the warm season.

 

[Lycaste53]

There is a relation between the volume, which has to be heated, and the surface (walls and roof) which loose energy. The smaller the volume, the biger the surface and the moore energy is lost by transmission.
It´s not possible to calculate it by the material only
Best regards, Gina

 

[s1214215]

Thanks everyone

I havent had time to reply to this thread this week. I appreciate all the information. I think I will go with a 6mm twin wall in the end.

Brett