PerkTop™

Porous concrete has been a passion of mine ever since the second job we did with it failed in 2006.  The surface had raveled, it became loose like gravel, starting a couple of months after it was installed.  At the time I was unaware just how sensitive this product can be.  I take some comfort these days now knowing that I wasn’t alone in my underestimation of how tricky pervious concrete is to install.  As it turns out around 50% of pervious / porous / permeable concrete installations are considered failures.  This is true in spite of the fact that it has been used in the U.S. for over 30 years now.

Since that initial failure I have dedicated myself to making our porous concrete installations more reliable.  We certainly can’t afford to go replacing half of our jobs.  In the process too, I decided it should be better looking.  Regular pervious concrete with its chunky, rice crispy treat looking appearance may be acceptable for certain industrial applications, but it isn’t a realistic aesthetic option for most of our residential clients.

The result of this dedication incorporating years of research & product testing, is what I call’PrettyPervious’.  PerkTop™ is more of a process than an actual product.  The process has to do with overlaying a thin layer of a finer, colored pervious concrete over regular pervious concrete, as it is being laid and is still in its plastic state.  The aggregate in PerkTop™ is so fine that from just a short distance the concrete looks like regular concrete and it certainly doesn’t look like it has the permeability that it has.  Our clients are always surprised at how much water just flows right through that tight, smooth surface.  Sometimes they even break out their 9″ stiletto high heels and parade around on it or don their roller skates and glide across it, because they can do these activities on our very ADA compliant version of pervious concrete!

By the way, the job that failed, we were able to make good on.  In the process of creating PerkTop™, we discovered that we could also make a version of it that was capable of overlaying on cured pervious concrete.  Therefore we removed the loose, raveled stone to get to the solid base and applied our modified PerkTop™ on top.  We now have a solid, attractive expanse of pervious concrete, without having had to remove and replace all that material.

Ryan

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