How To Work Out Roof Area For Soakaway

Soakaway Construction Drainage Drains Patio

Soakaway Construction Drainage Drains Patio

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Top Ten Soakaway Questions Expertly Answered By A Pro In 2019

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Which Roof Area To Account For When Calculating Soakaway Diynot Forums

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No Gravel Last 120 Years The Septic Tank Soakaway Www Septictank Co Uk Septic Tank Home Construction French Drain

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Septic Tank Soakaway Septic Tank Septic Tank Systems Diy Septic System

Septic Tank Soakaway Septic Tank Septic Tank Systems Diy Septic System

Okay that s the roof bit out of the way.

How to work out roof area for soakaway. Depending whether the roof area is measured horizontally. So get your tape measure out and calculate the total surface area in square metres. How to quickly test if a soakaway will work. It affects walkability as well as drainage and roofs in areas of high rain or snowfall tend to have steeper pitches.

30 m2 roof area x pitch angle factor 1 5 45 m2. All soakaways must be sited at least 5m from any building or road and preferably at least 2 5m from any boundary. To calculate the size volume of a rubble filled soakaway the same calculation can be used but the result divided by 0 3. Measure the length of the roof from one end to the other along the eaves.

8 7m x 6 98m 60 73m. For example 50m2 roof area requires a rubble filled soakaway of 50m 2 x 50 3000 0 3 2 8m 3. Roof pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used. Because this is only one half of the roof we will need to double this number to find the entire roof area 121 45m.

If you have several different surface areas connecting to the same soakaway roof gutter conservatory patio. Write this figure down on a notepad. One of the first things to consider when choosing a site for a soakaway is the water table aka saturation line. The two determining factors for soakaway success are the size of the area or volume of water to be drained and the percolation rate of the soil sub soil or in some sites the depth to the water table.

You need to calculate the whole impermeable area roof size patio size driveway size etc as well as perform percolation tests to determine the permeability of the ground around the property. And one cubic metre is suitable for 50 square metres of surface area. Roof pitch affects the actual area of the roof. So for our example the half roof area is as follows.

Calculating the roof area. In a prolonged downpour your roof will be taking 45 m2 of surface water and this will be going to your soakaway where else. This is calculated as follows.

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7 Steps To Create A Soakaway

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Rainwater Soakaway Crates 4 Rainwater Harvesting Water Storage Rainwater

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Driveway Soakaway How To Do It And What You Need To Know

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