Here’s a table to determine the pitch factor from the roof pitch. For example, if there are 4 inches between the bottom of the level and the roof surface, your roof rises – or is pitched – 4 inches per foot. The measurement value you get is called rise. From the 12-inch mark, measure the distance from the bottom of the level to the roof surface.Hold the level flat, with one end touching the roof surface.Measure the level 12 inches in from the end and mark it.You’ll need a sturdy ladder, a 2-foot level, and a tape measure.Here are the steps to calculate roof pitch. For example, if your roof rises 4 inches for every foot, the roof pitch is 4:12.Ĭalculating the roof pitch is necessary to determine the roof pitch factor. It tells you how many inches your roof rises for every 12 inches. Roof pitch refers to the steepness of your roof. Add up those values to find the total square footage. For hip, intersecting, gambrel, and mansard roofs, multiply the length and width of each flat area of your roof.For a gable roof, multiply the length and width of two slopes to find the total square footage.Here are the steps to get to that adjusted square footage number: Step 1: Calculate the Roof Area That single number will then determine the size of gutters you need. You will multiply those calculations to arrive at the “adjusted square footage” of your roof. You simply need to calculate the area of your roof, the pitch of your roof and learn the maximum rainfall intensity you can expect in your area. If you are looking for a new gutter system, it’s critical to understand the volume of water that will come off your roof in heavy rainstorms, as well as the rate it will flow. If you already have a perfect-fitting gutter and want to replace it with the same type, you can measure it and opt for a similar-sized gutter system. So the key to determining what size gutters you need is knowing how much water will flow off your roof in the heaviest rainstorms. Half-round gutters hold slightly less water. One foot of a 5-inch K-style gutter can manage 1.2 gallons of water before overflowing, while a 6-inch gutter can handle 2 gallons. Gutters also come in 7 or 8 inches but are usually used on commercial buildings (more on this later). If you have a larger home or live in an area with a lot of heavy rainfall, go for 6-inch gutters. Oversized gutters don’t overflow but are significantly more expensive and can spoil your home’s curb appeal.įive-inch gutters are the most common because they perfectly suit mid-sized homes. Undersized gutters clog frequently and cause water to overflow, damaging your roof, fascia, landscaping, and home’s foundation. But they do their job well only if they are properly sized. Gutters catch and direct rainwater away from your home’s foundation, preventing water damage. Why Gutter Size Matters Photo Credit: Comstock / Canva Pro / License Step 3: Find the Maximum Rainfall Intensity. Rain gutters keep siding and masonry looking new by preventing splash back or dirt, grass, and minerals that stain the exterior and can be difficult removing over time.Ĭollecting rain water is the simplest way to water your lawn, plants, and foundation all the while contributing to Michigan's Water Conservation goals. Standing water in flower beds around the home can permit harmful plant fungi to develop as well as attract ants, roaches, and termites. Roof drainage will direct water away from sensitive areas. Most durability issues arise from bulk water intrusion through windows and doors. Limit the movement of active zone soils underneath the foundation by reducing the amount of water that enters at the foundation wall. Keep Basements, crawl spaces, and garages dry and free of conditions that support mold and wood fungi growth by controlling roof damage The Triple Cove Profile has an additional upper cove designed into the profile, that adds another decorative line for the eye to follow from the ground.Ħ Ways Seamless Rain Gutters Protect Your Home:
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