Impermeable covers are resistant to air and water penetration. They are most often used in areas where extreme cold and long-term winter conditions exist that can result in a high probability of winter injury.
Covers may also be used in conjunction with an insulating layer, which may add additional protection to the turf. Insulating covers can be straw, foam or fiber type products. It is important to keep insulating layers dry as possible.
Larsen, A. 2010. Protecting greens in winter: A cost benefit analysis can help superintendents design a winter injury program that suits their needs. Golf Course Management 78(3): 86-102.
Dionne, J. 2008. Under the covers: Putting protective covers to the test. GreenMaster 43(4):16-20.
Table (Larsen, 2010)
|Cover Type||Desiccation||Freeze Injury||Freeze Smothering||Advantages|
|Permeable non-insulating||Yes||No||No||Accelerated spring green-up, easy to install and remove|
|Permeable insulating||Yes||Yes/No||Yes||Pretty good against winter injury|
|Impermeable||Yes||Yes||Yes||Effective for freeze injury|