RE: {Growing Under Cover} Digest for growing-under-cover@googlegroups.com - 3 Messages in 2 Topics

[Dan Halsey, 612-720-5001 Halsey1.com]

Trimming my post

 

Back in the days I had to manage an outdoor pool, we had a roll-up pool cover.

This bubble pack type material would roll up and in the sun, each inner layer would get increasingly hotter.

The middle of the roll could melt the plastic if you left it out in the sun. Which you were not advised to do.

Using a pool cover or large roll of bubble pack on the tunnel in winter might keep more heat.

 

I think a cold frame inside the tunnel, moved from outside use in the fall, would increase the temp on the soil.

The light will change slightly, but the collection and insulating factor would increase the ambient temp in the box.

 

Today our unheated porch is 75 degrees, its 20 degrees in the shade outside. The porch is usually 30-40 degrees warmer than the outside.

Thermal mass would help buffer the changes but if I added another layer of glass or plastic I am sure the temp would rise even more.

Double layer tunnels are much more efficient at collecting and keeping heat. If you drop down a divider sheet down the middle of the tunnel, I think the air temp would increase due to the decrease volume of air being heated. Even better would be a black curtain assuming the length faces the south.

 

Daniel Halsey
SouthWoods Forest Gardens
Southwoodsforestgardens.blogspot.com