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Retaining Walls
Dry-Stack vs Mortared
Dry-stack walls flex with freeze-thaw. Mortared walls don't. That single fact drives almost every decision.
Attribute
Dry-Stack
Mortared
Construction
Stacked without mortar, weight + fit hold it
Stones bonded with Type N or S mortar
Installed cost (CT)
$45–$75 / sq ft of wall face
$55–$90 / sq ft of wall face
Max practical height
~4 feet without engineering
Engineered to any height with footing
CT freeze-thaw behavior
Flexes — self-heals
Cracks if footing or drainage fails
Drainage
Inherent — water passes through
Requires perforated pipe + aggregate
Permit threshold (most CT towns)
>4 ft
>4 ft
Our Recommendation
For garden walls and retaining under 4 feet on Fairfield County properties, dry-stack natural stone is almost always the right call — it costs less, lasts longer in CT freeze-thaw, and looks like it grew there. For anything over 4 feet, on a property line, or retaining a slope with surcharge load (driveway above, structure above), you want engineered mortared construction with proper footing and drainage.
More Comparisons
Other masonry decisions worth weighing
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