Find the rainfall intensity for your locale.
How to measeur rain gutter.
How do you calculate gutter size.
How to calculate gutter and downspout capacity step 1.
Screw a downspout elbow to the outlet tube protruding down from the gutter.
Tools you ll need to measure the rain gutters and downspouts ladder.
You ll need direct access to the gutters so a ladder is going to be a critical tool to have on hand.
Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.
Hold another elbow against the house and cut a piece of downspout to fit between the two elbows.
The steeper a roof s pitch the more windblown rain it can collect.
Secure the downspout outlet to the gutter with four pop rivets or screws.
Measure your gutter across the top from the back where the gutter meets the home to the outer edge.
Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted.
Measure the diameter of the gutter.
Run the tape measure from 1 corner of the gutter as far as you can go toward the opposite corner.
Multiply length peak to.
See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches.
5 inch standard k style gutter shop 5 gutterbrush.
Use needlenosed pliers to slightly crimp the elbow to fit into the downspout as shown.
Carefully climb down the ladder and move it to the chalk mark.
Then use the chart below to see what size gutter you need.
6 inch 7 960 square feet.
Measure the roof to get the watershed area the area from which water will run off.
If you can find one that is at least.
If the gutter run measures longer than 40 feet 12 2 m it should be positioned to pitch down from the middle aimed toward a downspout at each end.
If a roof s various drainage areas call for different size gutters go for the biggest one k style.
Rain gutters can vary in size.
Typically gutters range in size from 10 to 15 cm 4 inches to 6 inches.
A tape measure is necessary in order to determine lengths accurately.
Use a measuring tape to determine the length of the gutter.
Make a mark with chalk and record the measurement.
If a new home is purchased but the sizing isn t known take a ladder and climb up with a measuring tape.
Measure from the chalk mark to the opposite corner of the gutter making another chalk mark and moving the ladder again if necessary.
5 inch 5 520 square feet.