You can also opt to measure from the middle of the spa, the corners do not interfere with your measurements. Skirt: The skirt is the flap that hangs from the bottom of your spa cover. It is usually 2 to 5 long. The skirt height is calculated based on customer preference and space. The perfect height is one that covers the acrylic, without being so long that it bunches and pushes the cover up and lets heat escape.
Noun. 1. berm-a narrow ledge or shelf typically at the top or bottom of a slope. ledge, shelf-a projecting ridge on a mountain or submerged under water.erm. 1. a level strip of ground at the summit or sides, or along the base, of a slope. 2. a nearly flat back portion of a beach formed of material deposited by the waves.
Back to Top. A wide beach berm with a berm crest is to the right, a water-filled trough (runnel), and a new berm to the left. The new berm is a depositional addition to the beach, representing recent accumulation of sand pushed ashore by wave action.asically, beach material is small pieces of rocks that have eroded and have been carried to the beach via the wind and water. The geology of the surrounding area determines the color of those rocks. This determines what material is available for a beach.