[BSYarg]

My Father (a senior) has an above grade (1 to 12 inches above) stone patio deck. The previous owner used pressure treated small railroad type ties to hold the stone's substrate (fine powder) in place. Over time the ties have worn out and the substrate has moved, causing the patio stones to shift downward.

What inexpensive repairs can be done to:

A. hold in the substrate beneath and in between the patio stones
B. that also won't buckle any deck retaining wall or lumber

The house sit on a down steep sloping grade, it has a covered deck (20x10 approx.), that extends just short of the where the old ties sat at the base of the deck.

Thanks

 

[Ron6519]

The least expensive would be to replace the railroad ties with pressure treated lumber.
Ron

 

[BSYarg]

Presure treated lumber

The least expensive would be to replace the railroad ties with pressure treated lumber.
Ron

Ok thanks,

Would the only option be those railroad type ties or is there another size and or type of pressure treated lumber, that could be used?

Thanks again, for your prompt reply!