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    NoVA neophyte's Avatar
    NoVA neophyte Posts: 2, Reputation: 1
    New Member

    Apr 30, 2008, 07:48 PM
    Dry laid Flagstone: sub-base only, or sub-base and base?
    Hi, I live in Northern VA and am installing dry laid 1.5" natural cleft flagstone on 4" of bluestone sub-base. I'd like this 500 sq ft. patio to last 20 years or more. My question:

    Is it overkill to add 2" of stonedust as a base on top of the bluestone sub-base, or is this unnecessary? If my current plan is sub-optimal, I'm very open to feedback.

    ballengerb1's Avatar
    ballengerb1 Posts: 27,379, Reputation: 2280
    Home Repair & Remodeling Expert

    May 1, 2008, 09:19 AM
    Is the 4" bluestone steppers or screenings? You do need a bed of screenings at least 2-4" deep. I think you may be using the term dust to describe screenings, it really is dusty but not plain dust.

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