Tips to Install a Winter Safety Pool Cover
The label on the safety cover likely goes right over the steps. This is a good start to aligning your cover the correct way.
Next, pick out the middle strap, secure the springs on each end and then do the same for the perpendicular strap. Now you can see the fixed position of the cover.
Line up your strap to mark the drill position as straight as possible. When drilling through interlock, don't be afraid to position the straps at a slight angle to avoid drilling to close to the edge of a stone. You don't want to chip an edge or crack an interlock stone.
Make sure that you drill deep enough for the post. You do not want to try to hammer the post through any remaining concrete or other material. The post could get stuck.
Rent an industrial hammer drill with a diamond drill bit; necessary for getting through interlock stone and concrete.
Make sure that you have the correct post lengths. Concrete-only anchors are super short (~ 1.75 inches, concrete subbase + interlock posts are longer (~ 10 inches), while posts for grass are the longest (~ 16 inches) and will need to be repositioned every few years to properly hold.
What happens if you hit rebar? If it is deep enough, you can cut down a bit of your post and be okay. If not, you may need to re-drill.
A properly installed post will be flush with the surface; should be seamless. For applying the cover in the winter time, the pegs inside of the posts screw up into its jacket. You only need to raise the pegs enough for the spring hook to properly set.
Too much tension on the springs is no good. There needs to be just enough tension that you need to pull the strap back onto the peg so that it does not pop off but not so much tension that you struggle to get the spring on even with an applicator bar.