As a general rule egutter recommends for roof areas that exceed 2800 square feet a 6 k style size with a 3 x 4 downspout size would be appropriate.
Roof gutter standard gutter dimensions.
5 inch 2 500 square feet.
If a roof s various drainage areas call for different size gutters go for the biggest one k style.
The standard is about inch per 10 feet.
5 inch standard k style gutter shop 5 gutterbrush.
Half round adjusted square footage of roof.
Houses with big steep roofs however may need wider gutters and extra downspouts to keep rainwater from overflowing.
You should have enough gutter downspouts to effectively handle the size of your entire gutter system.
These two types are able to handle the rainfall on majority of homes statewide.
They ll cost more and probably require a custom order through a professional installer.
It also comes in sizes 2 3 and 3 4.
Gutter style gutters are typically k style and half round styles though custom profile are available.
5 inch 5 520 square feet.
For most homes this will be a large enough gutter to handle the amount of water washing off of the roof but if you live in a particularly rainy area you will want to opt for wider downspouts to be installed with your new gutters.
This type of down spout is considered the standard downspout style in households and is used with a 5 k style guttering system.
The sizes available in this style are 3 4 5 and 6.
6 inch 7 960 square feet.
There are two most common type of residential gutters that we will talk about in this post for reliable roof gutter sizing.
The larger a gutter downspout the more water it can drain quickly.
See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches.
Get 7 or 8 inch gutters.
Five inch k style gutters.
Contractor certification certifying the roof gutter and downspout type sizes gage roof gutter slope and mounting method.
Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.
7 and greater are appropriate for churches and larger commercial buildings.
If rafter ends or fascia boards are repaired or replaced the certification shall also include the rafter end and fascia board material size type and mounting method.
6 inch 3 840 square feet.
Gutter downspout sizes are 3 to 6 inches.
Most downspouts are rectangular but they can also be round or square.
Increase the pitch of the gutter.
Then use the chart below to see what size gutter you need.
K style sizes will typically range from 5 to 6.
There are two main common sizes of gutters and one of them is 5 inch.
When you are considering what kind of gutters to get keep in mind that different gutter shapes have a significant impact on the capacity of the gutter.
This is most common in the k style gutters.
