Step 3 construct your frame.
Cold frame just a fiberglass sheet.
And the fiberglass and along the seam where the material contacts the horizontal 1 x 2 s will help to retain heat.
The bottles are used as the side and the top for the cold frame.
If you were looking for the perfect cold frame for your garden set up you now have 16 different diy cold frames to choose from.
Univents are odd looking aluminum linkages powered by a temperature sensitive cylinder that raises one end of the cover about a foot to prevent the frame from overheating.
Decide on the width depth and height of your cold frame so that you can buy the right amount of wood as well as the right size transparent sheet to go on top.
This cold frame actually sits up above the ground like a table and is perfect for starting seeds in the winter.
The frame can be constructed out of many materials but wood is the most common choice.
Traditional home garden cold frames measure 4 to 6 feet front to back and are 8 to 12 feet long.
To control the temperature in the cold frames i decided to attach univents made by solar vent works.
They are laid out with the long dimension running east to west.
It can also be purched from charley s greenhouse supply to the covers.
This will help hold in heat and should extend your growing season without overextending your budget.
With a clear acrylic sheet on top plenty of light hits the inside and there s a handy shelf underneath which provides a little extra storage space.
Cold frame table cold frame table.