Lifters for spa covers and hot tub covers consist of large U-shaped metal bars which go across the centre of the spa or hot tub. The spa cover or hot tub cover is then folded over the bar to push it off the spa or hot tub. Such bar lifters actually work well, as long as the cover is not too heavy.
While rigid foam board is commonly used in numerous insulation applications, it isn't such a popular choice when it comes to spa or hot tub covers. Foam spa covers and hot tub covers become heavy with time and break because they trap moisture inside and then become saturated. As a result, they become useless in terms of insulation because the foam has moisture trapped inside the little air spaces designed for insulation purposes.
Vermiculite insulation, has been used as loose-fill wall cavity and attic insulation in North America since the early 1920s. Pure Vermiculite does not pose any known health risks, however Vermiculite mined from the popular Libby, Montana site has been identified as containing traces of Tremolite asbestos. For the home owner with Vermiculite insulation, the origin of the naturally occurring mineral is of the most concern, however for the average home buyer, the stigma attached to the presence of Vermiculite affects the entire real estate transaction.
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