Never stored ours on blocks, but we have covered it and to me it was well worth it. Plus most covers by ADCO come with air conditioner and ladder top covers, so you put those on first before you cover the entire unit. One thing we learned the hard way if you have gutters with down spouts, make sure you cushion that area when you put the cover on. Otherwise during the winter the wind will cause the downspouts to wear out cover and cause holes. We wrap the down spouts with bubble wrap now
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