DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Bricks, Masonry and Concrete > drainage for concrete blocks

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Old 06-15-2014, 09:55 AM  
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Default drainage for concrete blocks

Need to provide excellent drainage for a small area where I'd like to lay 8 concrete blocks but normally fills with water. Is a bed of gravel and sand sufficient or can I put in some form of weeping tile below? How?


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Old 06-15-2014, 11:01 AM  
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Originally Posted by martyb11 View Post
normally fills with water.
Pour a known quantity of water into the area, say a few gallons, and time how long it takes to drain 'low enough'. The first gallon may move faster than the last gallon.

For worst case pick a time when the soil is already saturated from previous rainfalls. If the groundwater level is high in your area you may need to pump or pipe this water elsewhere.

Compare this drain rate with the expected rainfall and rainfall rates in your area. The best rain gauge I ever had is a 5 gal. bucket set upright in my truck bed but a coffee can will also work.

You have silt, sand or clay in your yard? ability&ie=UTF-8&oe=UTF-8

Clay to sand gives a 1:100 permeability ratio so proper construction is very important.

Last edited by Wuzzat?; 06-15-2014 at 11:23 AM.
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