Keeping Things Under Control

​     As indicated last week, the greenhouse roofs are very important, but just beneath them, we reside.  We are the retractable heat-retention curtains.  In winter we remain folded-up during the day but at night we are pulled out over the inside of the greenhouse.  We insulate and cause the heated area to be reduced at night.  This reduces the amount of heat needed to keep the plants warm.  During the day we fold up again to let the sun’s solar energy warm the greenhouses. 
     But wait there’s more!  During the hot part of the summer, we can again be unfolded, but it is during the day, and we then act as shading to help cool the greenhouses.  This helps reduce cooling costs in summer and enables plants to grow better during the hot months.  Yes, we are indeed a very versatile part of the greenhouse and we like to think that we keep things under control.