Best Sand for Expandable Liner
To verify, is masonry sand the best choice for a base under an expandable liner (or is concrete sand better)?
Also, is sand also placed along the angled drop-off as well as the shelf and bottom?
I prefer masonry sand over concrete sand, it should be a little finer. Concrete sand can be a little coarse.
I normally use a little dirt over the bottom rail and cover that with more sand. Everything else gets a layer of sand.
The deep end slopes need to have a little angle on them so that they will hold the sand.
The sand I use is usually delivered wet, since it is a washed sand. If it is not wet enough I will add some water, wet sand works so much better than dry sand.
Before spreading the sand I spray water on the slopes of the deep end. Once the sand is spread I spray it again. I use the flat side of a rake to smooth the entire pool base, including the slopes.
I then use a soft push broom and do it all again. The angles near the bottom of a deep area may be to sharp for the push broom and I will switch to a regular household broom.
Once it is as smooth as possible I spray the slopes one more time.