I attached a length of battening (resting on the window bars at each end of the greenhouse) against either long side of the greenhouse and tie in. Push wrap down behind your bench to floor, up over the bar and over top of bench and you create an individual insulated area within your greenhouse, or adapt to suit. Easy and cheap to construct, lift up the front on a warm day. I keep the battons in place all year as I use them to attach strings to grow tomatoes.