03/09/2026
Tension! - Why Drainer Grooves don't do exactly what it says on the tin!
Every now and then I still get complaints that a customers drainer grooves aren't 'working'. The truth is they are doing exactly what they are designed to do, it's just not what the name suggest.
The surface tension of the water, which is increased when it is in a curved channel, holds the water in place pretty well. This prevents the water from running down the groove once the volume of water drops to a certain level.
But what the grooves are actually there for is to prevent your clean washing up walking itself across the worktop by breaking the seal created. When you put a freshly washed up bowl onto a smooth surface, the warm bowl heats the air trapped inside it making it expand. This lifts the bowl slightly and turns it into a hovercraft. Off it goes with a mind of its own.
The grooves break this seal and allow the warm expanded air to escape. This keeps the bowl in exactly the position to placed it. Bowl saved, job done!
You even see this in a bathroom on a vertical wall. It isn't until you wipe it with a squeegee after a shower that you realise just how much water is left hanging on the wall. All by the magic of surface tension.
And in both cases, when the water dries it will leave behind a deposit of minerals. Limescale! To avoid this build up, just make sure you keep it as dry as you can.
In a bathroom this can be a bit of a faff. But beautiful things take some looking after. My wife told me this. So for the 60 seconds it takes, the pay off makes it more than worth it.
After so many years in the stone industry, you learn a lot. If you have any questions or curiosities, give us a shout. β¨ π