Greenhouse: leaky greenhouse, 1 by rentman

rentman wrote:
Nice GH, Sarah. Unless the gaps are very large don't worry too much about them. The GH needs to have air exchange, even in the winter and you have free gas heat.
First year I used two 1500 watt elect heaters, don't know what it cost. Last fall I ran a gas line from the house and installed a 10,000 BTU heater (small) non vented, and the gas heater keeps things above 40 on the coldest nights.
My GH, made from recycled windows, has many cracks where the vent windows do not close correctly.
Just my opinion.
Dwight