# How To Measure Roof Gutter Size

How To Measure Roof Gutter Size. Use the formula a = l x w where a is area, l is length and w is width. To calculate the effective roof area you should use this formula:

Roof area to be considered the design capacity for a roof drainage system depends on the quantity of water to be handled. Measure gutter across the top from the back where the gutter meets the home to the outer most edge. Roof projects may include tiling, installing insulation, ventilation and installing guttering.to calculate the roof area of a property with a classic gable roof (on which two roof sections meet in the middle in an inverted ‘v’ shape), all you need are two key dimensions.

### For Long Fascia Runs We Suggest Ordering Multiple Lengths And Joining

Use your tape measure to determine the length of the twine, marking down this calculation. Measure the length of the gutter for downspout locations. Use the formula a = l x w where a is area, l is length and w is width.

### A Gutter Ratio Can Be Used In Conjunction With The Effective Roof Area To Account For The Required Adjustment In System Flow Rate.

Measure gutter across the top from the back where the gutter meets the home to the outer most edge. Then use the chart below to see what size gutter you need. Gutter ratio = l1 / (l1 +l2) where:

### The Steeper A Roof’s Pitch, The More Windblown Rain It Can Collect.

Measure the width of the existing gutter. For a more elaborate roof shape you measure each section and. Measure each run of fascia and add an additional 200mm trimming allowance to each length to obtain your order length, adding an additional 100mm per join if using a slip join.

### If Your Gutter Is 5 Inches Wide Or Less, You'll Need Our 5 Inch Kit.

So if you divide your answer of a product of length times height by two, you will get the area of a triangle. That is how much rain a roof can drain during the most intense rainfall. This will give you the nominal size of the gutter regardless of the shape.

### Making Sure To Safely And Securely Place Your Ladders Against Your House, Carefully Climb Up And Measure The Width Of The Opening At The Top Of Your Gutter.

Stretch your tape measure along the walls from end to end in both directions. Multiply the roof square footage by a number determined by the roof pitch. Which size of gutter guard by gutterglove ® do you need?