For every 10 feet of gutter from this measurement and mark this distance at the low end of the gutter run.
Gutter board measurements.
If you don t have a drip edge mark the measurements on the edge of your roof or on the fascia board itself.
However in recent years some seamless forms of 7 inch gutter as well as other sizes have become available.
A 6 inch gutter with a 3 liter sink provides good drainage.
To ensure comfort is preserved as long as possible the gutters must be clean.
Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size.
This corresponds to a minimum top width of 6 inches.
The planks of wood themselves shall be 15cm wide by 2cm thick.
Drive a nail at this mark and stretch a chalk line between the two nails.
This gutter size works with large high roofs and a large volume of water.
If you aren t able to make marks use the measurement between your rafters as a guide.
Rafters are usually spaced 12 in 30 cm 16 in 41 cm or 18 in 46 cm apart on center.
See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches.
Gutters come in different sizes.
If you are replacing an existing gutter system once the old system is removed check for rot along the fascia board.
The availability of 7 inch top width k style gutter has been poor in the past.
Measure your gutter across the top from the back where the gutter meets the home to the outer edge.
For a 5 inch k style gutter the square footage should be up to 5 500 sq ft and for a 6 inch k style gutter the square footage should be upto 7 900 sq ft.
The importance of proper gutter sizing.
The gutterboard itself shall have the following dimensions 0 60m long and the two planks used to form the triangle shall be 0 25m wide at the base.
The use of 4 x 5 downspout outlets starts at a depth of gutter of 4 5 inches.
If there is damage replace the fascia plate.
After you have calculated the square footage use following calculations.
Finally measure and add the heights from the ground to the roofline in the locations where the downspouts will go.
They can be 4 5 or 6 inches.
The presence of gutters makes life in the house comfortable.
For half rounds 5 inch should be used for up to 2500 sq feet and 6 inch for up to 3 840 sq ft.
Align a level with the string to check the slope.
