A spa without a cover is also unsafe. Small children and pets could easily fall into a spa without a cover. Top of Page 2. Determining a Quality Cover . The cover is the first thing that will need replacing on your spa, so it is important to look for a quality cover.
Most covers look the same, however, it can be hard to determine a quality cover from an imposter.
Density of the Cover . Look for a cover with at least a 1.5 lb foam density. This type of cover is structurally sound with sufficient insulation. Some manufacturers use a 1 lb foam density, but it does not provide adequate insulation. There are even covers with 2 lb foam density, however, make sure the cover is not too heavy and cumbersome to handle.