1/8
Vertical Tolerance
in.
Held Flat
40+
ft.
0
Visual Interruptions
Engineered to Disappear
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A Space with No End
Vanishing edge swimming pools offer a truly uninterrupted visual
Mirror The Horizon
With an aesthetic rivaled only by the edge of the world, embrace the ultimate luxury
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A vanishing edge looks effortless from a chaise, which is the point. What the eye sees is a sheet of water that simply continues into the landscape beyond it, with no rim, no coping, no visible transition. What the eye does not see is the engineering required to produce that effect: a structural shell calibrated to remain perfectly level across spans of forty feet or more, a weir wall finished to a tolerance most construction never demands, a catch basin and circulation system sized to handle the precise volume of water flowing over the edge at any given moment, and a balancing system that maintains the visual stillness of the water regardless of wind, temperature, or the number of swimmers in the pool. The complexity is invisible. The result is not.
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In Consideration of Vanishing Edges
A vanishing edge is most often the right choice when a property has a view, a grade change, or both. The classic application is a pool sited at the edge of a hillside, where the water reads as if floating above the valley below, but vanishing edges work equally well on coastal properties where the water continues into the Pacific horizon, on flat lots where the edge dissolves into a reflecting pool or a downhill garden, and on architectural projects where the pool is designed to read as a continuation of the home's clean horizontal lines rather than a separate object in the yard. The Drummond portfolio includes vanishing edges across all of these conditions, with each one engineered to the specific demands of the site and the view it is designed to frame.
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The Anatomy of the Edge
Every vanishing edge is built around four engineered systems that work together to produce the visual effect. Understanding what they do is the easiest way to understand why some vanishing edges look right twenty years on and others do not.
The Weir Wall
The weir wall is the structural element that defines the edge itself. It must be poured and finished to a tolerance so fine that the water spilling over it forms a perfectly even sheet, with no thicker or thinner sections across its full length. Drummond weir walls are formed against precision-finished plywood templates, vibrated to eliminate voids, and finished by hand to the final tolerance. The wall is also engineered to remain perfectly level for the design life of the pool, which on a Drummond project means accounting for soil settlement, seasonal movement, and the specific seismic conditions of the Bay Area site it sits on.
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The Catch Basin
Beneath the edge sits a catch basin sized to hold the volume of water flowing over the weir at maximum circulation, plus an additional margin for the surge that occurs when swimmers enter the pool. The basin is hidden from view in finished installations, often tucked into the hardscape or planted edge of the property, and is engineered for serviceability across decades of use.
The Balancing System
A vanishing edge requires constant fine adjustment of water levels to maintain the visual effect. Drummond systems use a combination of hydraulic balance lines, electronic level sensors, and variable-speed pump controls to keep the edge sheeted evenly through every condition the pool will encounter: wind, temperature swings, evaporation, and the addition or subtraction of swimmers and their accompanying water displacement.
Finishing Details
Beyond the engineered systems, the visible details of a vanishing edge are what carry the design across decades. The tile that lines the weir wall is selected for its color match to the surrounding water, the coping at the edges is mitred and finished to maintain the unbroken horizontal line, and the transition from the pool to the surrounding deck or planting is detailed so that the eye reads the pool as belonging to the landscape rather than imposed on it. These are the details most pool builders never get to and most clients never see, and they are also the difference between a vanishing edge that ages well and one that does not.
A Technique Taught by Time
Drummond & Sons has built vanishing edge pools across the Bay Area for the better part of three decades, on properties from coastal Marin to the hillsides of Los Altos to the architectural estates of Atherton. The accumulated knowledge of those projects shows up in every new one, from the small structural decisions made before construction begins to the final tile transitions completed in the closing weeks of the build.
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Begin Your Vanishing Edge Pool
Every vanishing edge project begins with a site visit, because the design is fundamentally about the relationship between the pool, the property, and the view beyond it. The first conversation usually involves walking the site at the time of day the pool is most likely to be used, looking at the landscape from the perspective of the eventual edge, and discussing how the water is meant to engage with everything in the distance. From there, the design and engineering process takes its shape, custom to the property and to what the view asks the pool to do.
