Why Should Your Spa Cover's Foam Be Tapered? | Spa Covers Etc.
Spa Covers - T apered Foam Vs. Flat Foam by Spa Covers Etc. In the early years of the hot tub industry there wasn't much thought put into the engineering of the HOT TUB COVER . In the beginning, spa / hot tub covers were made of generic, off the shelf vinyl and a FLAT foam core. It didn't take long, usually after the first decent rain, the owner's of the covers reported that they have become very heavy (sometimes too heavy to lift). The flat foam core design allowed water to puddle on top of the cover and because ALL spa covers are sewn together, there are SEVERAL punctures (holes) in the vinyl dew to the stitches which allow water into the cover itself. This can water-log the foam core. Flat foam core covers do NOT encourage the water to run-off so the cover becomes heavy. Over time, the weight of the water puddling on the cover will cause the foam core to sag (bow) into the spa, exacerbating the problem ever more because the water begins to wick in