I'm planning a DIY patio paver project. The site is down a steep hillside only accessible via steps, where bringing in large amounts of base rock would be back breaking work.
I found this product called Brock Paver Base which purports to eliminate the need for the 4-6" layer of base rock. It is used in conjunction with a bed of sand directly over bare ground. However this product is quite expensive for what is essentially a piece of plastic with holes in it for drainage.
It seems to me that interior cement board with holes drilled in a regular pattern would accomplish the same effect of distributing the paver load over a larger area, at a fraction of the cost per sqft.
Has anyone heard of this being done, or see any obvious problem with it? Other cost effective base materials (outdoor carpet? vinyl flooring?)
Edit: This is in coastal California where frost is not an issue.