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The undisturbed subgrade pitches sharply away from the house, encouraging the water to go away from the house, and into the french drain channel.  The pea gravel base drains freely and quickly, and also provides a lot of storage area for water interstitially. Pea gravel joints were used in the irregular flagstone area, and for the base material, and around the perforated pipes. Pea gravel at a depth of 6″ nearly eliminates weed growth, and does not subside in rain.  Dual 3 inch diameter perforated plastic pipe was used.  Since we needed only 50 ft of run and had just enough fall, we doubled it up in the french drain, maximizing the storage capacity, and minimizing cost.  Sand jointing was used for the regular bluestone paver area, and the joints were kept to around 3/8″-1/4″ when possible.

 

Time to go put in another one!

🙂

This patio is in a narrow side yard. Under the patio is a bed of stone allowing the rainwater to escape away frm the house into a french drain running under the far edge of the patio. The materials are a combination of cut bluestone remnants and salvaged sandstone flagstones. When completed, plants along the patio edge will also help soak up stomwater and asist with atormwater infiltration into the soil. We can’t wait to see this space enjoyed!!!

You might recall the Richmond Residence from April 2011. Well, here it is!

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Mi Parque Spacemaking App Demo Video