Downsides

The universe is made up of Yin and Yang.
Nothing is all good or all bad.
Expectation is the mother of disappointment. If you expect everything to be perfect then you are unlikely to find happiness.

Why even write a page highlighting negatives on a site promoting Spa Covers?

I may not be the best salesman in the world but I made a commitment to avoid spin and just tell it like it is when deciding to establish this site. So here is all the bad stuff I can think of.

–  If you really want to see the spa water and not a vinyl lid then you may prefer not to have a cover. I have encountered several people who think like that and they are prepared to put up with the resulting inconveniences.

–  If you have an Ozone sanitizer on your spa that is more than 4 years old then you should think about the consequences of putting a cover on your spa. Ozone is particularly aggressive toward the stitching, vinyl and polypropylene underside.

–  The foam inlays inside your cover could become water-logged and very heavy after a few years. Until quite recently, plastic was wrapped around the inner foams and sealed with heavy duty sticky tape. In some cases this would allow water to eventually seep inside and be absorbed by the foam. Some manufacturers are now heat-sealing their foam inlays. This is a definite improvement but if the plastic membrane becomes damaged or disintegrates through time, water may still get in.
Probably the best insurance against this problem is to purchase a heavier duty foam which is less absorbent.

–  If you have a puppy under 12 months old it will probably try and destroy your spa cover. This is really common so please consider either not buying a cover or securing the spa area.

–  Some people have reported a nasty smell in their spa and on the cover. Without fail every pool shop will blame the cover. It’s a cheap shot. The cover is inert and cannot create a smell ( except perhaps the smell of new vinyl that may be evident for the first 48 hours after purchase ).
Unfortunately it may be true that despite what ever is creating the smell, the cover may also be trapping and amplifying the problem.

–  If your spa is situated on an exposed balcony overlooking the sea then I’m quite jealous. This area is also no doubt subject to strong winds. These winds will often remove roofs, uproot trees and bring down power lines. Incredibly though, most people feel it shouldn’t affect their spa cover. I know one guy whose cover flew 100 metres across the Patterson river. Another found his cover 20 metres up a gum tree. You will need to discuss options with someone like myself if you plan to cover a spa in a high wind area.

–  If your spa is sited under clear plastic roofing ( like in a pergola under laser-light ) , the roof is not pitched, the air-flow is limited and it’s over 40 degrees in the shade, then your spa cover could actually melt. Polystyrene will melt when exposed to enough heat. Although this is not common, I have seen it happen to new covers where the added flashing-off of the vinyl polymers exacerbates the problem. If your spa is in a stinking hot location your cover may get heat stroke.

Fortunately the benefits of having a cover on your spa massively out-weigh the negatives but if your situation falls into one of the above categories it’s important to factor it in before purchasing your cover.