It seems like the one consistent thing among all IG Vinyl kit makers is that you cannot use expandable material to backfill the overdig. Unfortunately that includes my central NC heavy clay dirt.
Why is it that expandable material cannot be used? Is it prone to swelling and exerting too much force on the pool wall? Thanks.
Why is it that expandable material cannot be used? Is it prone to swelling and exerting too much force on the pool wall? Thanks.